hydrocortisone/ciprofloxacin (Rx)

Acute Otitis Externa

3 gtt in affected ear q12hr for 7 days

Acute Otitis Externa

< 1 year

• Safety and efficacy not established

> 1 year

• 3 gtt in affected ear q12hr for 7 days

Contraindicated (3)

• fezolinetant

  ciprofloxacin will increase the level or effect of fezolinetant by affecting hepatic enzyme CYP1A2 metabolism. Contraindicated. Fezolinetant AUC and peak plasma concentration are increased if coadministered with drugs that are weak, moderate, or strong CYP1A2 inhibitors

• flibanserin

  ciprofloxacin will increase the level or effect of flibanserin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Coadministration of flibanserin with moderate or strong CYP3A4 inhibitors is contraindicated. Severe hypotension or syncope can occur.

• mifepristone

  mifepristone, hydrocortisone. Mechanism: unknown. Contraindicated. Mfr. states that mifepristone is contraindicated in pts. on long term corticosteroid Tx.

Serious - Use Alternative (150)

• adenovirus types 4 and 7 live, oral

  hydrocortisone decreases effects of adenovirus types 4 and 7 live, oral by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Corticosteroids may diminish therapeutic effects of vaccines and increase risk of adverse effects (increased risk of infection). Live-attenuated vaccines should be avoided for at least 3mo after cessation of corticosteroid therapy.

• aldesleukin

  hydrocortisone decreases effects of aldesleukin by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Avoid combination because corticosteroids can potentially diminish the antineoplastic effects of aldesleukin.

• alosetron

  ciprofloxacin will increase the level or effect of alosetron by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Alosetron is associated with potentially serious and life-threatening, dose-related gastrointestinal adverse effects, concomitant use with CYP450 1A2 inhibitors should generally be avoided if possible.

• aluminum hydroxide

  aluminum hydroxide decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Separate by 2 hours.

• aminolevulinic acid oral

  aminolevulinic acid oral, ciprofloxacin. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Avoid administering other phototoxic drugs with aminolevulinic acid oral for 24 hr during perioperative period.

• aminolevulinic acid topical

  ciprofloxacin increases toxicity of aminolevulinic acid topical by pharmacodynamic synergism. Avoid or Use Alternate Drug. Coadministration of photosensitizing drugs may enhance the phototoxic reaction to photodynamic therapy with aminolevulinic acid.

• amisulpride

  amisulpride and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. ECG monitoring is recommended if coadministered.

• anagrelide

  anagrelide and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• BCG vaccine live

  ciprofloxacin decreases effects of BCG vaccine live by pharmacodynamic antagonism. Contraindicated. Antibiotics may diminish therapeutic effects of BCG. Wait until Abx Tx complete to administer live bacterial vaccine.

• anthrax vaccine

  hydrocortisone decreases effects of anthrax vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• astemizole

  hydrocortisone will decrease the level or effect of astemizole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• axicabtagene ciloleucel

  hydrocortisone, axicabtagene ciloleucel. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug. Consider the use of prophylactic corticosteroid in patients after weighing the potential benefits and risks. Corticosteroids may, however, be required for treatment of cytokine release syndrome or neurologic toxicity.

• BCG vaccine live

  hydrocortisone decreases effects of BCG vaccine live by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• brexucabtagene autoleucel

  hydrocortisone, brexucabtagene autoleucel. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug. Avoid prophylactic use of systemic corticosteroids as premedication before CAR-T cell therapy. Corticosteroids may, however, be required for treatment of cytokine release syndrome or neurologic toxicity.

• buprenorphine

  buprenorphine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine buccal

  buprenorphine buccal and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine subdermal implant

  buprenorphine subdermal implant and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine transdermal

  buprenorphine transdermal and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine, long-acting injection

  buprenorphine, long-acting injection and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• carbamazepine

  carbamazepine will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• carbonyl iron

  carbonyl iron decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug.

• ceritinib

  ceritinib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• cholera vaccine

  ciprofloxacin, cholera vaccine. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Avoid coadministration of cholera vaccine with systemic antibiotics since these agents may be active against the vaccine strain. Do not administer cholera vaccine to patients who have received oral or parenteral antibiotics within 14 days prior to vaccination.

• ciltacabtagene autoleucel

  hydrocortisone, ciltacabtagene autoleucel. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug. Avoid prophylactic use of systemic corticosteroids as premedication before CAR-T cell therapy. Corticosteroids may, however, be required for treatment of cytokine release syndrome or neurologic toxicity.

• cimetidine

  cimetidine will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• cisapride

  hydrocortisone will decrease the level or effect of cisapride by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• clarithromycin

  clarithromycin will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
  
  clarithromycin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• clomipramine

  ciprofloxacin will increase the level or effect of clomipramine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Concurrent use of drugs that can cause QT interval prolongation may result in additive effects and increased risk of ventricular arrhythmias. It is important to monitor therapy carefully.

• dihydroergotamine

  hydrocortisone will decrease the level or effect of dihydroergotamine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• clozapine

  ciprofloxacin will increase the level or effect of clozapine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Use caution when administering ciprofloxacin in patients receiving drugs that prolong the QT interval. At elevated serum concentrations, clozapine may produce clinically significant prolongation of the QTc interval.
  
  clozapine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• cobimetinib

  ciprofloxacin will increase the level or effect of cobimetinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concurrent short term (14 days or less) use of moderate CYP3A inhibitors is unavoidable for patients who are taking cobimetinib 60 mg, reduce the cobimetinib dose to 20 mg. After discontinuation of a moderate CYP3A inhibitor, resume cobimetinib 60 mg. Use an alternative to a moderate CYP3A inhibitor in patients who are taking a reduced dose of cobimetinib (40 or 20 mg daily).

• desflurane

  desflurane and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• didanosine

  didanosine decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Oral ciprofloxacin should not be administered simultaneously with didanosine (chewable tablets or powder for oral solution). Administer oral doses of ciprofloxacin 2 hours before or 6 hours after didanosine, chewable tablets or powder for oral solution.

• dihydroergotamine intranasal

  hydrocortisone will decrease the level or effect of dihydroergotamine intranasal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• diphtheria & tetanus toxoids

  hydrocortisone decreases effects of diphtheria & tetanus toxoids by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• diphtheria & tetanus toxoids/ acellular pertussis vaccine

  hydrocortisone decreases effects of diphtheria & tetanus toxoids/ acellular pertussis vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• diphtheria & tetanus toxoids/acellular pertussis/poliovirus, inactivated vaccine

  hydrocortisone decreases effects of diphtheria & tetanus toxoids/acellular pertussis/poliovirus, inactivated vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• dofetilide

  dofetilide increases toxicity of ciprofloxacin by QTc interval. Avoid or Use Alternate Drug.

• dronedarone

  ciprofloxacin and dronedarone both increase QTc interval. Avoid or Use Alternate Drug. The use of dronedarone in combination with other medications that can prolong the QT interval is contraindicated.
  
  hydrocortisone will decrease the level or effect of dronedarone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• eliglustat

  eliglustat and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• erdafitinib

  erdafitinib will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If coadministration unavoidable, separate administration by at least 6 hr before or after administration of P-gp substrates with narrow therapeutic index.

• encorafenib

  encorafenib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• entrectinib

  ciprofloxacin and entrectinib both increase QTc interval. Avoid or Use Alternate Drug.

• ergotamine

  hydrocortisone will decrease the level or effect of ergotamine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• eribulin

  eribulin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• erythromycin base

  erythromycin base will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
  
  hydrocortisone will decrease the level or effect of erythromycin base by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• erythromycin ethylsuccinate

  erythromycin ethylsuccinate will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
  
  hydrocortisone will decrease the level or effect of erythromycin ethylsuccinate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• erythromycin lactobionate

  erythromycin lactobionate will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
  
  hydrocortisone will decrease the level or effect of erythromycin lactobionate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• erythromycin stearate

  erythromycin stearate will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
  
  hydrocortisone will decrease the level or effect of erythromycin stearate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• everolimus

  hydrocortisone will decrease the level or effect of everolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• fexinidazole

  fexinidazole and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Avoid coadministration of fexinidazole with drugs known to block potassium channels and/or prolong QT interval.

• glasdegib

  ciprofloxacin and glasdegib both increase QTc interval. Avoid or Use Alternate Drug. If coadministration unavoidable, monitor for increased risk of QTc interval prolongation.

• hepatitis A vaccine inactivated

  hydrocortisone decreases effects of hepatitis A vaccine inactivated by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• hepatitis a/b vaccine

  hydrocortisone decreases effects of hepatitis a/b vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• hepatitis a/typhoid vaccine

  hydrocortisone decreases effects of hepatitis a/typhoid vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• hepatitis b vaccine

  hydrocortisone decreases effects of hepatitis b vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• human papillomavirus vaccine, bivalent

  hydrocortisone decreases effects of human papillomavirus vaccine, bivalent by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Immunosuppressive therapies, including irradiation, antimetabolites, alkylating agents, cytotoxic drugs, and corticosteroids (used in greater than physiologic doses), may reduce the immune responses to vaccines.

• human papillomavirus vaccine, nonavalent

  hydrocortisone decreases effects of human papillomavirus vaccine, nonavalent by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Immunosuppressive therapies, including irradiation, antimetabolites, alkylating agents, cytotoxic drugs, and corticosteroids (used in greater than physiologic doses), may reduce the immune responses to vaccines.

• human papillomavirus vaccine, quadrivalent

  hydrocortisone decreases effects of human papillomavirus vaccine, quadrivalent by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Immunosuppressive therapies, including irradiation, antimetabolites, alkylating agents, cytotoxic drugs, and corticosteroids (used in greater than physiologic doses), may reduce the immune responses to vaccines.

• hydroxychloroquine sulfate

  hydroxychloroquine sulfate and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• ibrutinib

  ciprofloxacin increases levels of ibrutinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid concomitant use of ibrutinib and strong CYP3A4 inhibitors. If a strong CYP3A4 inhibitor must be used short-term (eg, anti-infectives for =7 days), interrupt ibrutinib therapy until strong CYP3A4 inhibitor is discontinued.

• idecabtagene vicleucel

  hydrocortisone, idecabtagene vicleucel. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug. Avoid prophylactic use of systemic corticosteroids as premedication before CAR-T cell therapy. Corticosteroids may, however, be required for treatment of cytokine release syndrome or neurologic toxicity.

• imipramine

  ciprofloxacin will increase the level or effect of imipramine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Concurrent use of drugs that can cause QT interval prolongation may result in additive effects and increased risk of ventricular arrhythmias. It is important to monitor therapy carefully.

• influenza virus vaccine quadrivalent

  hydrocortisone decreases effects of influenza virus vaccine quadrivalent by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• influenza virus vaccine quadrivalent, adjuvanted

  hydrocortisone decreases effects of influenza virus vaccine quadrivalent, adjuvanted by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Immunosuppressive drugs may reduce the immune response to influenza vaccine.

• influenza virus vaccine quadrivalent, cell-cultured

  hydrocortisone decreases effects of influenza virus vaccine quadrivalent, cell-cultured by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• influenza virus vaccine quadrivalent, intranasal

  hydrocortisone decreases effects of influenza virus vaccine quadrivalent, intranasal by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• influenza virus vaccine trivalent

  hydrocortisone decreases effects of influenza virus vaccine trivalent by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• influenza virus vaccine trivalent, adjuvanted

  hydrocortisone decreases effects of influenza virus vaccine trivalent, adjuvanted by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Immunosuppressive drugs may reduce the immune response to influenza vaccine.

• Japanese encephalitis virus vaccine

  hydrocortisone decreases effects of Japanese encephalitis virus vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• inotuzumab

  inotuzumab and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. If unable to avoid concomitant use, obtain ECGs and electrolytes before and after initiation of any drug known to prolong QTc, and periodically monitor as clinically indicated during treatment.

• iron sucrose

  iron sucrose decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• isoflurane

  isoflurane and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• ivosidenib

  ivosidenib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Avoid coadministration of QTc prolonging drugs with ivosidenib or replace with alternate therapies. If coadministration of a QTc prolonging drug is unavoidable, monitor for increased risk of QTc interval prolongation.

• lasmiditan

  lasmiditan increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.
  
  lasmiditan increases levels of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

• lefamulin

  lefamulin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• lisocabtagene maraleucel

  hydrocortisone, lisocabtagene maraleucel. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug. Avoid prophylactic use of systemic corticosteroids as premedication before CAR-T cell therapy. Corticosteroids may, however, be required for treatment of cytokine release syndrome or neurologic toxicity.

• lonafarnib

  ciprofloxacin will increase the level or effect of lonafarnib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration of lonafarnib (a sensitive CYP3A substrate) with weak CYP3A inhibitors is unavoidable, reduce to, or continue lonafarnib at starting dose. Closely monitor for arrhythmias and events (eg, syncope, heart palpitations) since lonafarnib effect on QT interval is unknown.

• lovastatin

  hydrocortisone will decrease the level or effect of lovastatin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• macimorelin

  hydrocortisone, macimorelin. unspecified interaction mechanism. Avoid or Use Alternate Drug. Drugs that directly affect the pituitary secretion of growth hormone (GH) may impact the accuracy of the macimorelin diagnostic test. Allow sufficient washout time of drugs affecting GH release before administering macimorelin. .
  
  macimorelin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Macimorelin causes an increase of ~11 msec in the corrected QT interval. Avoid coadministration with drugs that prolong QT interval, which could increase risk for developing torsade de pointes-type ventricular tachycardia. Allow sufficient washout time of drugs that are known to prolong the QT interval before administering macimorelin.

• measles (rubeola) vaccine

  hydrocortisone decreases effects of measles (rubeola) vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• mefloquine

  mefloquine increases toxicity of ciprofloxacin by QTc interval. Avoid or Use Alternate Drug. Mefloquine may enhance the QTc prolonging effect of high risk QTc prolonging agents.

• measles mumps and rubella vaccine, live

  hydrocortisone decreases effects of measles mumps and rubella vaccine, live by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• measles, mumps, rubella and varicella vaccine, live

  hydrocortisone decreases effects of measles, mumps, rubella and varicella vaccine, live by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• meningococcal A C Y and W-135 polysaccharide vaccine combined

  hydrocortisone decreases effects of meningococcal A C Y and W-135 polysaccharide vaccine combined by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• methyl aminolevulinate

  ciprofloxacin, methyl aminolevulinate. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Each drug may increase the photosensitizing effect of the other.

• microbiota oral

  ciprofloxacin decreases effects of microbiota oral by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Microbiota oral contains bacterial spores. Antibacterial agents may decrease efficacy if coadministered. Complete antibiotic regimens 2-4 days before initiating microbiota oral. .

• mirtazapine

  mirtazapine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• mobocertinib

  mobocertinib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. If coadministration unavoidable, reduce mobocertinib dose and monitor QTc interval more frequently.

• nefazodone

  nefazodone will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• olanzapine

  olanzapine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• olaparib

  ciprofloxacin will increase the level or effect of olaparib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration with moderate CYP3A inhibitors cannot be avoided, reduce olaparib dose to 200 mg (capsule) or 150 mg (tablet) PO BID. Do not substitute tablets with capsules.

• ondansetron

  ciprofloxacin and ondansetron both increase QTc interval. Avoid or Use Alternate Drug. Avoid with congenital long QT syndrome; ECG monitoring recommended with concomitant medications that prolong QT interval, electrolyte abnormalities, CHF, or bradyarrhythmias.

• oxaliplatin

  oxaliplatin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• pacritinib

  hydrocortisone will decrease the level or effect of pacritinib by affecting hepatic enzyme CYP2E1 metabolism. Avoid or Use Alternate Drug.
  
  hydrocortisone will decrease the level or effect of pacritinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• panobinostat

  ciprofloxacin and panobinostat both increase QTc interval. Avoid or Use Alternate Drug. Panobinostat is known to significantly prolong QT interval. Panobinostat prescribing information states use with drugs known to prolong QTc is not recommended.

• pirfenidone

  ciprofloxacin will increase the level or effect of pirfenidone by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Use of strong CYP1A2 inhibitors should be discontinued before initiating pirfenidone and avoided during treatment; if strong CYP1A2 inhibitors are the only drug of choice, dosage reductions are recommended

• pitolisant

  ciprofloxacin and pitolisant both increase QTc interval. Avoid or Use Alternate Drug.

• pneumococcal vaccine 13-valent

  hydrocortisone decreases effects of pneumococcal vaccine 13-valent by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• pneumococcal vaccine heptavalent

  hydrocortisone decreases effects of pneumococcal vaccine heptavalent by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• pneumococcal vaccine polyvalent

  hydrocortisone decreases effects of pneumococcal vaccine polyvalent by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• poliovirus vaccine live oral trivalent

  hydrocortisone decreases effects of poliovirus vaccine live oral trivalent by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• pomalidomide

  ciprofloxacin increases levels of pomalidomide by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug.

• quinidine

  quinidine will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

• rabies vaccine

  hydrocortisone decreases effects of rabies vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids may interfere with development of active immunity.

• rabies vaccine chick embryo cell derived

  hydrocortisone decreases effects of rabies vaccine chick embryo cell derived by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• ranolazine

  hydrocortisone will decrease the level or effect of ranolazine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• rasagiline

  ciprofloxacin will increase the level or effect of rasagiline by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Ciprofloxacin may increase rasagiline concentration resulting in increased adverse reactions. Patients should be closely monitored during concomitant use of these drugs.

• ribociclib

  ribociclib increases toxicity of ciprofloxacin by QTc interval. Avoid or Use Alternate Drug.

• rifabutin

  rifabutin will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• rifampin

  rifampin will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• rotavirus oral vaccine, live

  hydrocortisone decreases effects of rotavirus oral vaccine, live by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• rubella vaccine

  hydrocortisone decreases effects of rubella vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• saquinavir

  saquinavir increases levels of ciprofloxacin by pharmacodynamic synergism. Avoid or Use Alternate Drug. Potential for increased toxicity. Increased risk of QT prolongation and cardiac arrhythmias.

• selinexor

  selinexor, ciprofloxacin. unspecified interaction mechanism. Avoid or Use Alternate Drug. Patients treated with selinexor may experience neurological toxicities. Avoid taking selinexor with other medications that may cause dizziness or confusion.

• sertindole

  hydrocortisone will decrease the level or effect of sertindole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• sevoflurane

  sevoflurane and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• silodosin

  hydrocortisone will decrease the level or effect of silodosin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• simvastatin

  hydrocortisone will decrease the level or effect of simvastatin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• siponimod

  siponimod and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• sirolimus

  hydrocortisone will decrease the level or effect of sirolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• smallpox (vaccinia) vaccine, live

  hydrocortisone decreases effects of smallpox (vaccinia) vaccine, live by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• sotorasib

  sotorasib will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If use is unavoidable, refer to the prescribing information of the P-gp substrate for dosage modifications.
  
  sotorasib will decrease the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If use is unavoidable, refer to the prescribing information of the P-gp substrate for dosage modifications.

• squill

  hydrocortisone increases toxicity of squill by unspecified interaction mechanism. Avoid or Use Alternate Drug.

• tepotinib

  tepotinib will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If concomitant use unavoidable, reduce the P-gp substrate dosage if recommended in its approved product labeling.

• St John's Wort

  St John's Wort will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• tepotinib

  tepotinib will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If concomitant use unavoidable, reduce the P-gp substrate dosage if recommended in its approved product labeling.

• terfenadine

  hydrocortisone will decrease the level or effect of terfenadine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• testosterone intranasal

  testosterone intranasal, hydrocortisone. Either increases effects of the other by Other (see comment). Avoid or Use Alternate Drug. Comment: Coadministration increases risk for edema, particularly in patients with cardiac, renal, or hepatic disease.

• tetanus toxoid adsorbed or fluid

  hydrocortisone decreases effects of tetanus toxoid adsorbed or fluid by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• theophylline

  ciprofloxacin will increase the level or effect of theophylline by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Concomitant use of theophylline and ciprofloxacin has decreased theophylline clearance and increased plasma levels and symptoms of toxicity. Serious and fatal reactions have included cardiac arrest, seizure, status epilepticus, and respiratory failure. If concomitant use cannot be avoided, monitor theophylline levels and adjust dosage as needed.
  
  ciprofloxacin will increase the level or effect of theophylline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Concomitant use of theophylline and ciprofloxacin has decreased theophylline clearance and increased plasma levels and symptoms of toxicity. Serious and fatal reactions have included cardiac arrest, seizure, status epilepticus, and respiratory failure. If concomitant use cannot be avoided, monitor theophylline levels and adjust dosage as needed.

• tick-borne encephalitis vaccine

  hydrocortisone decreases effects of tick-borne encephalitis vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• tisagenlecleucel

  hydrocortisone, tisagenlecleucel. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug. Avoid prophylactic use of systemic corticosteroids as premedication before CAR-T cell therapy. Corticosteroids may, however, be required for treatment of cytokine release syndrome or neurologic toxicity.

• tizanidine

  ciprofloxacin will increase the level or effect of tizanidine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Coadministration of ciprofloxacin and tizanidine is contraindicated.

• tofacitinib

  hydrocortisone, tofacitinib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug.

• tolvaptan

  hydrocortisone will decrease the level or effect of tolvaptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• toremifene

  ciprofloxacin and toremifene both increase QTc interval. Avoid or Use Alternate Drug. Concurrent use of toremifene with agents causing QT prolongation should be avoided. If concomitant use is required it's recommended that toremifene be interrupted. If interruption not possible, patients requiring therapy with a drug that prolongs QT should be closely monitored. ECGs should be obtained for high risk patients.

• travelers diarrhea and cholera vaccine inactivated

  hydrocortisone decreases effects of travelers diarrhea and cholera vaccine inactivated by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• tretinoin

  ciprofloxacin, tretinoin. Mechanism: pharmacodynamic synergism. Avoid or Use Alternate Drug. Both drugs have increased risk of phototoxicity, use caution with concomitant use.

• tretinoin topical

  ciprofloxacin, tretinoin topical. Mechanism: pharmacodynamic synergism. Avoid or Use Alternate Drug. Both drugs have increased risk of phototoxicity, use caution with concomitant use.

• trilaciclib

  trilaciclib will decrease the level or effect of ciprofloxacin by Other (see comment). Avoid or Use Alternate Drug. Avoid coadministration of trilaciclib (OCT2, MATE1, and MATE-2K inhibitor) with substrates where minimal increased concentration in kidney or blood may lead to serious or life-threatening toxicities.

• typhoid polysaccharide vaccine

  hydrocortisone decreases effects of typhoid polysaccharide vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• typhoid vaccine live

  hydrocortisone decreases effects of typhoid vaccine live by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.
  
  ciprofloxacin decreases effects of typhoid vaccine live by pharmacodynamic antagonism. Contraindicated. Antibiotics may diminish the therapeutic effects of Typhoid Vaccine. Wait until Abx Tx complete to administer live bacterial vaccine.

• umeclidinium bromide/vilanterol inhaled

  ciprofloxacin increases toxicity of umeclidinium bromide/vilanterol inhaled by QTc interval. Avoid or Use Alternate Drug. Exercise extreme caution when vilanterol coadministered with drugs that prolong QTc interval; adrenergic agonist effects on the cardiovascular system may be potentiated.

• varicella virus vaccine live

  hydrocortisone decreases effects of varicella virus vaccine live by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• vandetanib

  ciprofloxacin, vandetanib. Either increases toxicity of the other by QTc interval. Avoid or Use Alternate Drug. Avoid coadministration with drugs known to prolong QT interval; if a drug known to prolong QT interval must be used, more frequent ECG monitoring is recommended.

• vemurafenib

  vemurafenib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Concomitant use of vemurafenib with drugs that prolong QT interval is not recommended.

• venetoclax

  ciprofloxacin will increase the level or effect of venetoclax by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If a moderate CYP3A inhibitor must be used, reduce the venetoclax dose by at least 50%. Monitor more closely for signs of venetoclax toxicities.

• vilanterol/fluticasone furoate inhaled

  ciprofloxacin increases toxicity of vilanterol/fluticasone furoate inhaled by QTc interval. Avoid or Use Alternate Drug. Exercise extreme caution when vilanterol coadministered with drugs that prolong QTc interval; adrenergic agonist effects on the cardiovascular system may be potentiated.

• yellow fever vaccine

  hydrocortisone decreases effects of yellow fever vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

Monitor Closely (436)

• acarbose

  ciprofloxacin increases effects of acarbose by pharmacodynamic synergism. Use Caution/Monitor. Quinolone antibiotic administration may result in hyper- or hypoglycemia. .

• aceclofenac

  aceclofenac, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• acemetacin

  acemetacin, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• albiglutide

  hydrocortisone decreases effects of albiglutide by pharmacodynamic antagonism. Use Caution/Monitor. Corticosteroids may diminish hypoglycemic effect of antidiabetic agents. Monitor blood glucose levels carefully. .

• albuterol

  albuterol and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• alfuzosin

  ciprofloxacin and alfuzosin both increase QTc interval. Use Caution/Monitor.
  
  alfuzosin and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• alitretinoin

  hydrocortisone will decrease the level or effect of alitretinoin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• almotriptan

  hydrocortisone will decrease the level or effect of almotriptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• alprazolam

  hydrocortisone will decrease the level or effect of alprazolam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• amifampridine

  ciprofloxacin increases toxicity of amifampridine by Other (see comment). Modify Therapy/Monitor Closely. Comment: Amifampridine can cause seizures. Coadministration with drugs that lower seizure threshold may increase this risk.

• amiodarone

  hydrocortisone will decrease the level or effect of amiodarone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  amiodarone will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  ciprofloxacin and amiodarone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• amobarbital

  amobarbital will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• arformoterol

  arformoterol and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• antithrombin alfa

  hydrocortisone, antithrombin alfa. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• antithrombin III

  hydrocortisone, antithrombin III. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• aprepitant

  aprepitant will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of aprepitant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• argatroban

  hydrocortisone, argatroban. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• aripiprazole

  hydrocortisone will decrease the level or effect of aripiprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  aripiprazole and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• armodafinil

  armodafinil will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• arsenic trioxide

  ciprofloxacin and arsenic trioxide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• artemether

  ciprofloxacin and artemether both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• artemether/lumefantrine

  artemether/lumefantrine will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin and artemether/lumefantrine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.
  
  hydrocortisone will decrease the level or effect of artemether/lumefantrine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• asenapine

  ciprofloxacin will increase the level or effect of asenapine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Asenapine has been associated with dose-related prolongation of the QT interval; asenapine should not be used with other agents also known to have this effect.
  
  ciprofloxacin and asenapine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• aspirin

  aspirin, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• asenapine transdermal

  asenapine transdermal and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• aspirin

  aspirin decreases levels of ciprofloxacin by Other (see comment). Use Caution/Monitor. Comment: Buffered aspirin may decrease absorption of quinolones. Consider administering 2 hr before or 6 hr after, buffered aspirin administration.

• aspirin rectal

  aspirin rectal, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• aspirin/citric acid/sodium bicarbonate

  aspirin/citric acid/sodium bicarbonate decreases levels of ciprofloxacin by Other (see comment). Use Caution/Monitor. Comment: Buffered aspirin may decrease absorption of quinolones. Consider administering 2 hr before or 6 hr after, buffered aspirin administration.
  
  aspirin/citric acid/sodium bicarbonate, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• atazanavir

  atazanavir will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• atogepant

  ciprofloxacin will increase the level or effect of atogepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• atogepant

  hydrocortisone will decrease the level or effect of atogepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• atomoxetine

  atomoxetine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• atorvastatin

  hydrocortisone will decrease the level or effect of atorvastatin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  atorvastatin will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• atracurium

  atracurium, hydrocortisone. Other (see comment). Use Caution/Monitor. Comment: Coadministration of corticosteroids and neuromuscular blockers may increase risk of developing acute myopathy.

• avapritinib

  ciprofloxacin will increase the level or effect of avapritinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• axitinib

  ciprofloxacin increases levels of axitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone decreases levels of axitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• azithromycin

  azithromycin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor.

• bazedoxifene/conjugated estrogens

  hydrocortisone will decrease the level or effect of bazedoxifene/conjugated estrogens by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• bazedoxifene/conjugated estrogens

  ciprofloxacin will decrease the level or effect of bazedoxifene/conjugated estrogens by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• bedaquiline

  ciprofloxacin and bedaquiline both increase QTc interval. Modify Therapy/Monitor Closely. ECG should be monitored closely

• belatacept

  belatacept and hydrocortisone both increase immunosuppressive effects; risk of infection. Use Caution/Monitor.

• bemiparin

  hydrocortisone, bemiparin. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• benazepril

  benazepril increases toxicity of ciprofloxacin by unknown mechanism. Use Caution/Monitor. ACE Inhibitors may increase arrhythmogenic potential of ciprofloxacin, possibly by increasing serum potassium levels.

• bendamustine

  ciprofloxacin increases levels of bendamustine by decreasing metabolism. Use Caution/Monitor. Decreased conversion of bendamustine to active metabolites. Concurrent administration of a CYP1A2 inhibitor such as ciprofloxacin may increase bendamustine concentrations. .

• berotralstat

  berotralstat will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor or titrate P-gp substrate dose if coadministered.
  
  berotralstat will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor or titrate P-gp substrate dose if coadministered.

• betamethasone

  betamethasone, ciprofloxacin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• bivalirudin

  hydrocortisone, bivalirudin. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• betaxolol

  ciprofloxacin increases levels of betaxolol by decreasing metabolism. Use Caution/Monitor. Consider modifying therapy; CYP1A2 inhibitors may decrease metabolism of 1A2 substrates.

• biotin

  biotin will decrease the level or effect of ciprofloxacin by altering intestinal flora. Applies only to oral form of both agents. Use Caution/Monitor. Administer ciprofloxacin 4 hours before or 2 hours after biotin.

• bosentan

  bosentan will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• bosutinib

  bosutinib increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  bosutinib increases levels of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• budesonide

  budesonide will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• caffeine

  ciprofloxacin will increase the level or effect of caffeine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. The hepatic metabolism of caffeine may be decreased by ciprofloxacin; pharmacologic effects of caffeine may be increased.

• buspirone

  hydrocortisone will decrease the level or effect of buspirone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• butabarbital

  butabarbital will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• butalbital

  butalbital will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• calcium acetate

  calcium acetate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.

• calcium carbonate

  calcium carbonate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.

• calcium chloride

  calcium chloride decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.

• calcium citrate

  calcium citrate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.

• calcium gluconate

  calcium gluconate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.

• captopril

  captopril increases toxicity of ciprofloxacin by Mechanism: unspecified interaction mechanism. Use Caution/Monitor. ACE Inhibitors increase arrhythmogenic potential of ciprofloxacin. Monitor ECG and QT interval.

• carbamazepine

  ciprofloxacin will increase the level or effect of carbamazepine by decreasing metabolism. Modify Therapy/Monitor Closely. Monitor plasma levels when used concomitantly
  
  hydrocortisone will decrease the level or effect of carbamazepine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• celecoxib

  ciprofloxacin, celecoxib. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  celecoxib, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• chloroquine

  chloroquine and ciprofloxacin both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• cholera vaccine

  hydrocortisone decreases effects of cholera vaccine by immunosuppressive effects; risk of infection. Modify Therapy/Monitor Closely. Immunosuppressive therapies, including irradiation, antimetabolites, alkylating agents, cytotoxic drugs and corticosteroids (used in greater than physiologic doses), may reduce the immune response to cholera vaccine.

• chlorpromazine

  ciprofloxacin and chlorpromazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• chlorpropamide

  ciprofloxacin increases effects of chlorpropamide by pharmacodynamic synergism. Use Caution/Monitor. Careful monitoring of blood glucose is recommended when quinolones and antidiabetic agents are coadministered. Hyperglycemia and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agent.

• cholestyramine

  cholestyramine decreases levels of hydrocortisone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.

• choline magnesium trisalicylate

  choline magnesium trisalicylate, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• cilostazol

  hydrocortisone will decrease the level or effect of cilostazol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• cinacalcet

  hydrocortisone will decrease the level or effect of cinacalcet by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• ciprofloxacin

  hydrocortisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• cisatracurium

  cisatracurium, hydrocortisone. Other (see comment). Use Caution/Monitor. Comment: Coadministration of corticosteroids and neuromuscular blockers may increase risk of developing acute myopathy.

• citalopram

  ciprofloxacin and citalopram both increase QTc interval. Use Caution/Monitor. ECG monitoring is recommended, along with drugs that may prolong the QT interval.

• clarithromycin

  clarithromycin will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• clopidogrel

  hydrocortisone will increase the level or effect of clopidogrel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. CYP3A4 inducers may increase the metabolism of clopidogrel to its active metabolite. Monitor patients for potential increase in antiplatelet effects when CYP3A4 inducers are used in combination with clopidogrel

• clotrimazole

  clotrimazole will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• clozapine

  hydrocortisone will decrease the level or effect of clozapine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• colchicine

  hydrocortisone will decrease the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin increases toxicity of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Fatal drug interactions reported when colchicine administered with dual inhibitor of CYP3A4 and P-glycoprotein; toxicities also reported when colchicine administered with inhibitors of CYP3A4; coadminister only if no other option available; contraindicated in renal or hepatic impairment with drugs that inhibit both P-gp and CYP3A4.

• conivaptan

  conivaptan will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of conivaptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• conjugated estrogens

  ciprofloxacin will decrease the level or effect of conjugated estrogens by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• conjugated estrogens

  hydrocortisone will decrease the level or effect of conjugated estrogens by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• conjugated estrogens, vaginal

  hydrocortisone will decrease the level or effect of conjugated estrogens, vaginal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• corticotropin

  corticotropin and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• cortisone

  cortisone will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  cortisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• crizotinib

  crizotinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor. ECG monitoring is recommended, along with drugs that may prolong the QT interval.

• cyclosporine

  cyclosporine will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  cyclosporine will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  hydrocortisone, cyclosporine. decreasing metabolism. Use Caution/Monitor. Corticosteroids may increase or decrease cyclosporine concentrations. Also, cyclosporine may increase the plasma concentrations of the corticosteroids. Monitor for changes in cyclosporine concentrations and for toxicities of corticosteroids and/or cyclosporine.
  
  hydrocortisone, cyclosporine. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may increase or decrease cyclosporine concentrations. Also, cyclosporine may increase the plasma concentrations of the corticosteroids. Monitor for changes in cyclosporine concentrations and for toxicities of corticosteroids and/or cyclosporine.

• dalteparin

  hydrocortisone, dalteparin. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• darifenacin

  darifenacin will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• darunavir

  darunavir will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of darunavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• dasatinib

  dasatinib will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of dasatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  dasatinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• deferasirox

  deferasirox will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• degarelix

  ciprofloxacin and degarelix both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• dengue vaccine

  hydrocortisone decreases effects of dengue vaccine by immunosuppressive effects; risk of infection. Use Caution/Monitor. Immunosuppressive therapies (eg, irradiation, antimetabolites, alkylating agents, cytotoxic drugs, corticosteroids [greater than physiologic doses]) may reduce immune response to dengue vaccine.

• denosumab

  hydrocortisone, denosumab. Other (see comment). Use Caution/Monitor. Comment: Caution should be taken in patients on concomitant immunosuppressants or with impaired immune systems because of increased risk for serious infections.

• deutetrabenazine

  deutetrabenazine and ciprofloxacin both increase QTc interval. Use Caution/Monitor. At the maximum recommended dose, deutetrabenazine does not prolong QT interval to a clinically relevant extent. Certain circumstances may increase risk of torsade de pointes and/or sudden death in association with drugs that prolong the QTc interval (eg, bradycardia, hypokalemia or hypomagnesemia, coadministration with other drugs that prolong QTc interval, presence of congenital QT prolongation).

• dexamethasone

  dexamethasone will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  dexamethasone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• DHEA, herbal

  DHEA, herbal will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• dichlorphenamide

  dichlorphenamide and ciprofloxacin both decrease serum potassium. Use Caution/Monitor.

• diazepam

  hydrocortisone will decrease the level or effect of diazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• dichlorphenamide

  dichlorphenamide and hydrocortisone both decrease serum potassium. Use Caution/Monitor.

• diclofenac

  diclofenac, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  diclofenac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• dienogest/estradiol valerate

  hydrocortisone will decrease the level or effect of dienogest/estradiol valerate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Advise women to use alternative method of contraception or back-up method when moderate or weak enzyme inducer is used with combination contraceptives. Back-up contraception should be continued for 28 days after discontinuing medication to ensure contraceptive reliability.
  
  ciprofloxacin will decrease the level or effect of dienogest/estradiol valerate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor. An alternate or additional form of birth control may be advisable during concomitant use.

• diflunisal

  diflunisal, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  diflunisal, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• diltiazem

  diltiazem will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• disopyramide

  ciprofloxacin and disopyramide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• dofetilide

  ciprofloxacin and dofetilide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• dolasetron

  ciprofloxacin and dolasetron both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• donepezil

  donepezil and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• doxepin

  doxepin and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• dronedarone

  dronedarone will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  dronedarone will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• droperidol

  ciprofloxacin and droperidol both decrease QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• duloxetine

  ciprofloxacin will increase the level or effect of duloxetine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Coadministration of CYP1A2 inhibiting quinolones with duloxetine may lead to significant increases in duloxetine levels, AUC, and half-life. Consider therapy modification if duloxetine is necessary.

• dyphylline

  hydrocortisone will decrease the level or effect of dyphylline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• efavirenz

  efavirenz will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  efavirenz and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• elagolix

  elagolix will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  elagolix will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• eletriptan

  hydrocortisone will decrease the level or effect of eletriptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• eliglustat

  eliglustat increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Monitor therapeutic drug concentrations, as indicated, or consider reducing the dosage of the P-gp substrate and titrate to clinical effect.

• eliglustat

  eliglustat increases levels of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Monitor therapeutic drug concentrations, as indicated, or consider reducing the dosage of the P-gp substrate and titrate to clinical effect.

• eltrombopag

  ciprofloxacin will increase the level or effect of eltrombopag by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• eluxadoline

  ciprofloxacin increases levels of eluxadoline by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. As a precautionary measure due to incomplete information on the metabolism of eluxadoline, use caution when coadministered with strong CYP1A2 inhibitors.

• enoxaparin

  hydrocortisone, enoxaparin. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• erlotinib

  hydrocortisone will decrease the level or effect of erlotinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin increases levels of erlotinib by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. If severe adverse effects occur consider reducing erlotinib dose.

• erythromycin base

  erythromycin base will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  ciprofloxacin and erythromycin base both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.

• erythromycin ethylsuccinate

  erythromycin ethylsuccinate will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  ciprofloxacin and erythromycin ethylsuccinate both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.

• erythromycin lactobionate

  ciprofloxacin and erythromycin lactobionate both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.
  
  erythromycin lactobionate will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• erythromycin stearate

  ciprofloxacin and erythromycin stearate both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.
  
  erythromycin stearate will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• escitalopram

  escitalopram increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor.

• estradiol

  hydrocortisone will decrease the level or effect of estradiol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• estradiol

  ciprofloxacin will decrease the level or effect of estradiol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• estrogens conjugated synthetic

  hydrocortisone will decrease the level or effect of estrogens conjugated synthetic by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin will decrease the level or effect of estrogens conjugated synthetic by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• estrogens esterified

  hydrocortisone will decrease the level or effect of estrogens esterified by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• estropipate

  ciprofloxacin will decrease the level or effect of estropipate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• estropipate

  hydrocortisone will decrease the level or effect of estropipate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• ethinylestradiol

  ciprofloxacin will decrease the level or effect of ethinylestradiol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• etodolac

  etodolac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  etodolac, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• etonogestrel

  hydrocortisone will decrease the level or effect of etonogestrel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• etrasimod

  etrasimod, ciprofloxacin. Either increases effects of the other by QTc interval. Modify Therapy/Monitor Closely. Transient decrease in heart rate and AV conduction delays may occur when initiating etrasimod. Owing to potential of additive effect on heart rate, etrasimod may increase risk of QT prolongation and Torsades de Pointes when coadministered with Class Ia or Class III antiarrhythmic drugs, or other drugs that prolong the QT interval. .

• etravirine

  hydrocortisone will decrease the level or effect of etravirine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  etravirine will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• exenatide injectable solution

  hydrocortisone decreases effects of exenatide injectable solution by pharmacodynamic antagonism. Use Caution/Monitor. Corticosteroids may diminish hypoglycemic effect of antidiabetic agents. Monitor blood glucose levels carefully. .

• exenatide injectable suspension

  hydrocortisone decreases effects of exenatide injectable suspension by pharmacodynamic antagonism. Use Caution/Monitor. Corticosteroids may diminish hypoglycemic effect of antidiabetic agents. Monitor blood glucose levels carefully.

• ezogabine

  ezogabine, ciprofloxacin. Either increases toxicity of the other by QTc interval. Use Caution/Monitor. Slight and transient QT-prolongation observed with ezogabine, particularly when dose titrated to 1200 mg/day. QT interval should be monitored when ezogabine is prescribed with agents known to increase QT interval.

• felodipine

  hydrocortisone will decrease the level or effect of felodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  felodipine will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• fenoprofen

  fenoprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  fenoprofen, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• ferric citrate

  ferric citrate will decrease the level or effect of ciprofloxacin by drug binding in GI tract. Use Caution/Monitor. Take at least 2 hours before or after ferric citrate

• fesoterodine

  hydrocortisone will decrease the level or effect of fesoterodine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• ferric maltol

  ferric maltol decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• ferrous fumarate

  ferrous fumarate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• ferrous gluconate

  ferrous gluconate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• ferrous sulfate

  ferrous sulfate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• finerenone

  ciprofloxacin will increase the level or effect of finerenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Monitor serum potassium during initiation and dosage adjustment of either finererone or weak CYP3A4 inhibitors. Adjust finererone dosage as needed.

• fingolimod

  fingolimod and ciprofloxacin both increase QTc interval. Use Caution/Monitor.
  
  hydrocortisone increases effects of fingolimod by immunosuppressive effects; risk of infection. Modify Therapy/Monitor Closely. Concomitant therapy is expected to increase the risk of immunosuppression. Use caution when switching patients from long-acting therapies with immune effects. .

• flecainide

  ciprofloxacin and flecainide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• fluconazole

  fluconazole will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• fludrocortisone

  fludrocortisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.
  
  fludrocortisone will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• fluoxetine

  ciprofloxacin and fluoxetine both increase QTc interval. Modify Therapy/Monitor Closely.

• flurbiprofen

  flurbiprofen, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• flurbiprofen

  flurbiprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• fondaparinux

  hydrocortisone, fondaparinux. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• fosamprenavir

  fosamprenavir will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of fosamprenavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• fosaprepitant

  fosaprepitant will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of fosaprepitant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• fosphenytoin

  fosphenytoin will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  fosphenytoin will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• fostamatinib

  fostamatinib will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Concomitant use of fostamatinib may increase concentrations of P-gp substrates. Monitor for toxicities of the P-gp substrate drug that may require dosage reduction when given concurrently with fostamatinib.
  
  fostamatinib will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Concomitant use of fostamatinib may increase concentrations of P-gp substrates. Monitor for toxicities of the P-gp substrate drug that may require dosage reduction when given concurrently with fostamatinib.

• fostemsavir

  ciprofloxacin and fostemsavir both increase QTc interval. Use Caution/Monitor. QTc prolongation reported with higher than recommended doses of fostemsavir.

• gemifloxacin

  hydrocortisone and gemifloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• gemtuzumab

  ciprofloxacin and gemtuzumab both increase QTc interval. Use Caution/Monitor.

• gepirone

  gepirone and ciprofloxacin both increase QTc interval. Modify Therapy/Monitor Closely.

• gilteritinib

  gilteritinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• glecaprevir/pibrentasvir

  glecaprevir/pibrentasvir will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  glecaprevir/pibrentasvir will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• glimepiride

  ciprofloxacin increases effects of glimepiride by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• glycerol phenylbutyrate

  hydrocortisone decreases effects of glycerol phenylbutyrate by Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may cause the breakdown of body protein and increase plasma ammonia levels; monitor ammonia levels closely when glycerol phenylbutyrate is coadministered with corticosteroids.

• glipizide

  ciprofloxacin increases effects of glipizide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• glyburide

  ciprofloxacin increases effects of glyburide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• goserelin

  goserelin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• granisetron

  granisetron and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• grapefruit

  grapefruit will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• griseofulvin

  griseofulvin will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• guanfacine

  hydrocortisone will decrease the level or effect of guanfacine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• haemophilus influenzae type b vaccine

  hydrocortisone decreases effects of haemophilus influenzae type b vaccine by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. Avoid vaccination during chemotherapy or radiation therapy if possible because antibody response might be suboptimal. Patients vaccinated within a 14-day period before starting or during immunosuppressive therapy should be revaccinated =3 months after therapy is discontinued if immune competence has been restored.

• haloperidol

  ciprofloxacin and haloperidol both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• hemin

  hydrocortisone decreases effects of hemin by pharmacodynamic synergism. Use Caution/Monitor. Drugs that increase delta-aminolevulinic acid synthetase may decrease hemin effect.

• heparin

  hydrocortisone, heparin. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• histrelin

  histrelin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• hydrocortisone

  hydrocortisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• hydrocortisone rectal

  hydrocortisone rectal and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• hydroxyprogesterone caproate (DSC)

  hydrocortisone will decrease the level or effect of hydroxyprogesterone caproate (DSC) by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• hydroxyzine

  hydroxyzine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• ibuprofen

  ibuprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  ibuprofen, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• ibuprofen IV

  ibuprofen IV, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  ibuprofen IV, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• ibutilide

  ciprofloxacin and ibutilide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• iloperidone

  hydrocortisone will decrease the level or effect of iloperidone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• ifosfamide

  ciprofloxacin will decrease the level or effect of ifosfamide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Use of a CYP3A4 inhibitor may decrease metabolism of ifosfamide, potentially reducing ifosfamide therapeutic effects.

• iloperidone

  ciprofloxacin and iloperidone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• indacaterol, inhaled

  hydrocortisone, indacaterol, inhaled. serum potassium. Use Caution/Monitor. Combination may increase risk of hypokalemia.
  
  indacaterol, inhaled, ciprofloxacin. QTc interval. Use Caution/Monitor. Drugs that are known to prolong the QTc interval may have an increased the risk of ventricular arrhythmias.

• indinavir

  indinavir will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  indinavir will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• indomethacin

  indomethacin, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• indomethacin

  indomethacin, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• influenza A (H5N1) vaccine

  hydrocortisone decreases effects of influenza A (H5N1) vaccine by pharmacodynamic antagonism. Use Caution/Monitor. Corticosteroids used in greater than physiologic doses may reduce immune response to H5N1 vaccine.

• influenza virus vaccine (H5N1), adjuvanted

  hydrocortisone decreases effects of influenza virus vaccine (H5N1), adjuvanted by pharmacodynamic antagonism. Use Caution/Monitor. Corticosteroids used in greater than physiologic doses may reduce immune response to H5N1 vaccine.

• influenza virus vaccine quadrivalent, recombinant

  hydrocortisone decreases effects of influenza virus vaccine quadrivalent, recombinant by pharmacodynamic antagonism. Use Caution/Monitor. Immune response to vaccine may be decreased in immunocompromised individuals.

• influenza virus vaccine trivalent, recombinant

  hydrocortisone decreases effects of influenza virus vaccine trivalent, recombinant by pharmacodynamic antagonism. Use Caution/Monitor. Immune response to vaccine may be decreased in immunocompromised individuals.

• insulin aspart

  ciprofloxacin increases effects of insulin aspart by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• insulin degludec

  hydrocortisone decreases effects of insulin degludec by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. Endogneous cortisol is a regulatory hormone that increases blood glucose levels; exogenous systemic corticosteroids have been associated with hyperglycemia and may cause diabetes with chronic, high dose use; dose of antidiabetic agents may need adjustment and increased frequency of glucose monitoring may be required.

• insulin degludec/insulin aspart

  hydrocortisone decreases effects of insulin degludec/insulin aspart by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. Endogneous cortisol is a regulatory hormone that increases blood glucose levels; exogenous systemic corticosteroids have been associated with hyperglycemia and may cause diabetes with chronic, high dose use; dose of antidiabetic agents may need adjustment and increased frequency of glucose monitoring may be required.

• insulin inhaled

  hydrocortisone decreases effects of insulin inhaled by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. Endogneous cortisol is a regulatory hormone that increases blood glucose levels; exogenous systemic corticosteroids have been associated with hyperglycemia and may cause diabetes with chronic, high dose use; dose of antidiabetic agents may need adjustment and increased frequency of glucose monitoring may be required.

• insulin lispro

  ciprofloxacin increases effects of insulin lispro by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• insulin regular human

  ciprofloxacin increases effects of insulin regular human by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• iron dextran complex

  iron dextran complex decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• isavuconazonium sulfate

  hydrocortisone and isavuconazonium sulfate both decrease immunosuppressive effects; risk of infection. Use Caution/Monitor.
  
  ciprofloxacin will increase the level or effect of isavuconazonium sulfate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of isavuconazonium sulfate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• isoniazid

  isoniazid will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• istradefylline

  istradefylline will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Istradefylline 40 mg/day increased peak levels and AUC of P-gp substrates in clinical trials. Consider dose reduction of sensitive P-gp substrates.

• istradefylline

  istradefylline will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Istradefylline 40 mg/day increased peak levels and AUC of P-gp substrates in clinical trials. Consider dose reduction of sensitive P-gp substrates.

• itraconazole

  itraconazole and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• ivacaftor

  ivacaftor increases levels of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Ivacaftor and its M1 metabolite has the potential to inhibit P-gp; may significantly increase systemic exposure to sensitive P-gp substrates with a narrow therapeutic index.
  
  ivacaftor increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Ivacaftor and its M1 metabolite has the potential to inhibit P-gp; may significantly increase systemic exposure to sensitive P-gp substrates with a narrow therapeutic index.
  
  ciprofloxacin increases levels of ivacaftor by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Monitor when coadministered with weak CYP3A4 inhibitors .

• ivosidenib

  ciprofloxacin will increase the level or effect of ivosidenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration with moderate CYP3A4 inhibitors may increase ivosidenib plasma concentrations, thus increasing the risk of QTc prolongation. Monitor for increased risk of QTc interval prolongation.

• ixabepilone

  hydrocortisone will decrease the level or effect of ixabepilone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• ketoconazole

  ketoconazole will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ketoconazole will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• ketoprofen

  ketoprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  ketoprofen, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• ketorolac

  ketorolac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  ketorolac, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• ketorolac intranasal

  ketorolac intranasal, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• lanthanum carbonate

  lanthanum carbonate decreases levels of ciprofloxacin by cation binding in GI tract. Use Caution/Monitor. Administer oral quinolone antibiotics at least 1 hr before or 4 hr after lanthanum. Interaction applies only to oral quinolones.

• lacidipine

  hydrocortisone will decrease the level or effect of lacidipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• lapatinib

  lapatinib will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of lapatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  lapatinib will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• lemborexant

  ciprofloxacin will increase the level or effect of lemborexant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Lower nightly dose of lemborexant recommended if coadministered with weak CYP3A4 inhibitors. See drug monograph for specific dosage modification.

• lenacapavir

  lenacapavir will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Lenacapavir (a CYP3A4 inhibitor) may significantly increase levels of hydrocortisone, resulting in an increase risk of toxicities (eg, Cushing syndrome, adrenal suppression). Initiate dexamethasone as the lowest starting dose, monitor, and titrate accordingly.

• lenvatinib

  ciprofloxacin and lenvatinib both increase QTc interval. Use Caution/Monitor. Lenvatinib prescribing information recommends monitoring ECG closely when coadministered with QT prolonging drugs.

• lepirudin

  hydrocortisone, lepirudin. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• lercanidipine

  hydrocortisone will decrease the level or effect of lercanidipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• letermovir

  letermovir increases levels of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• leuprolide

  leuprolide increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• levobupivacaine

  hydrocortisone will decrease the level or effect of levobupivacaine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• levofloxacin

  hydrocortisone and levofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• levoketoconazole

  levoketoconazole will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  levoketoconazole will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• levonorgestrel oral/ethinylestradiol/ferrous bisglycinate

  ciprofloxacin will decrease the level or effect of levonorgestrel oral/ethinylestradiol/ferrous bisglycinate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor. Antibiotics may decrease hormonal contraceptive efficacy.

• lidocaine

  ciprofloxacin will increase the level or effect of lidocaine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Lidocaine plasma levels may be elevated, increasing the risk of toxicity. Monitor cardiac function and symptoms of toxicity.

• linagliptin

  hydrocortisone will increase the level or effect of linagliptin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Use of alternative treatments is strongly recommended when linagliptin is to be administered with a CYP3A4 inducer

• liraglutide

  hydrocortisone decreases effects of liraglutide by pharmacodynamic antagonism. Use Caution/Monitor. Corticosteroids may diminish hypoglycemic effect of antidiabetic agents. Monitor blood glucose levels carefully. .

• lithium

  lithium and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• lomitapide

  ciprofloxacin increases levels of lomitapide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Lomitapide dose should not exceed 30 mg/day.
  
  lomitapide increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Consider reducing dose when used concomitantly with lomitapide.
  
  lomitapide increases levels of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Consider reducing dose when used concomitantly with lomitapide.

• lonafarnib

  lonafarnib will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Lonafarnib is a weak P-gp inhibitor. Monitor for adverse reactions if coadministered with P-gp substrates where minimal concentration changes may lead to serious or life-threatening toxicities. Reduce P-gp substrate dose if needed.

• lumefantrine

  ciprofloxacin and lumefantrine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• lonapegsomatropin

  lonapegsomatropin decreases effects of hydrocortisone by Other (see comment). Use Caution/Monitor. Comment: Growth hormone (GH) inhibits microsomal enzyme 11 beta-hydroxysteroid dehydrogenase type 1, which converts cortisone to its active metabolite, cortisol. Patients with untreated GH deficiency may have increases in serum cortisol, and initiation of lonapegsomatropin may result decreased serum cortisol. Patients with hypoadrenalism treated with glucocorticoids may require an increase glucocorticoid stress or maintenance doses following lonapegsomatropin initiation.
  
  hydrocortisone decreases effects of lonapegsomatropin by Other (see comment). Use Caution/Monitor. Comment: Glucocorticoid therapy and supraphysiologic glucocorticoid treatment may attenuate the growth promoting effects of lonapegsomatropin in children. Carefully adjust glucocorticoid replacement dosing in children receiving glucocorticoid treatments to avoid both hypoadrenalism and an inhibitory effect on growth.
  
  hydrocortisone decreases effects of lonapegsomatropin by pharmacodynamic antagonism. Use Caution/Monitor. Supraphysiologic glucocorticoid treatment may attenuate growth-promoting effects of growth hormone (GH). Microsomal enzyme 11-beta-hydroxysteroid dehydrogenase type 1 (11-beta-HSD-1) is required for conversion of cortisone to its active metabolite, cortisol, in hepatic and adipose tissue. GH inhibits 11-beta-HSD-1. Consequently, individuals with untreated GH deficiency have relative increases in 11-beta-HSD-1 and serum cortisol. Initiation of GH analogs may result in inhibition of 11-beta-HSD-1 and reduced serum cortisol concentrations.

• lopinavir

  hydrocortisone will decrease the level or effect of lopinavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• loratadine

  hydrocortisone will decrease the level or effect of loratadine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  loratadine will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• lornoxicam

  lornoxicam, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• lovastatin

  lovastatin will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• lumefantrine

  hydrocortisone will decrease the level or effect of lumefantrine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  lumefantrine will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• magnesium chloride

  magnesium chloride decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium citrate

  magnesium citrate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium hydroxide

  magnesium hydroxide decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium oxide

  magnesium oxide decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Separate by 2 hours.

• magnesium sulfate

  magnesium sulfate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium supplement

  magnesium supplement will decrease the level or effect of ciprofloxacin by Other (see comment). Modify Therapy/Monitor Closely. Formation of an insoluble complex reduces absorption of the drug through intestinal tract; administer magnesium 2hr before the quinolone or 6hr after the quinolone

• maraviroc

  hydrocortisone will decrease the level or effect of maraviroc by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• marijuana

  marijuana will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• meclofenamate

  meclofenamate, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  meclofenamate, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• mefenamic acid

  mefenamic acid, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  mefenamic acid, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• mefloquine

  ciprofloxacin and mefloquine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• meloxicam

  meloxicam, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• melatonin

  ciprofloxacin will increase the level or effect of melatonin by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Monitor melatonin effects if coadministered with moderate CYP1A2 inhibitors

• meloxicam

  meloxicam, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• meningococcal group B vaccine

  hydrocortisone decreases effects of meningococcal group B vaccine by pharmacodynamic antagonism. Use Caution/Monitor. Individuals with altered immunocompetence may have reduced immune responses to the vaccine.

• mestranol

  ciprofloxacin will decrease the level or effect of mestranol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of mestranol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• metformin

  ciprofloxacin increases effects of metformin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• methadone

  hydrocortisone will decrease the level or effect of methadone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• methadone

  ciprofloxacin and methadone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• methotrexate

  ciprofloxacin will increase the level or effect of methotrexate by Other (see comment). Use Caution/Monitor. Renal tubular transport of methotrexate may be inhibited by coadministration of ciprofloxacin, potentially leading to increased methotrexate plasma levels and toxicity.

• methylprednisolone

  methylprednisolone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.
  
  hydrocortisone will decrease the level or effect of methylprednisolone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• metronidazole

  metronidazole will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• mexiletine

  ciprofloxacin will increase the level or effect of mexiletine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Mexiletine concentrations may be elevated and may produce an increase in therapeutic and adverse reactions.

• miconazole vaginal

  miconazole vaginal will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• midazolam

  hydrocortisone will decrease the level or effect of midazolam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• midazolam intranasal

  ciprofloxacin will increase the level or effect of midazolam intranasal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration of mild CYP3A4 inhibitors with midazolam intranasal may cause higher midazolam systemic exposure, which may prolong sedation.

• mifepristone

  ciprofloxacin will increase the level or effect of mifepristone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Use alternatives if available.

• miglitol

  ciprofloxacin increases effects of miglitol by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• mometasone inhaled

  mometasone inhaled and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• moxifloxacin

  ciprofloxacin and moxifloxacin both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.
  
  hydrocortisone and moxifloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• nabumetone

  nabumetone, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  nabumetone, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• naproxen

  naproxen, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  naproxen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• nateglinide

  ciprofloxacin increases effects of nateglinide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• nefazodone

  nefazodone will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• nelfinavir

  nelfinavir will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• nevirapine

  nevirapine will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• nicardipine

  hydrocortisone will decrease the level or effect of nicardipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  nicardipine will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• nifedipine

  nifedipine will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  nifedipine will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• nilotinib

  hydrocortisone will decrease the level or effect of nilotinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin and nilotinib both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.
  
  nilotinib will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  nilotinib will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• nisoldipine

  hydrocortisone will decrease the level or effect of nisoldipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• olanzapine

  ciprofloxacin will increase the level or effect of olanzapine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Olanzapine plasma concentrations may be elevated, increasing the risk of adverse reactions such as orthostatic hypotension or sedation. It is important to use caution and observe patient and adjust the olanzapine dosage as needed.

• norfloxacin

  hydrocortisone and norfloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• ocrelizumab

  hydrocortisone and ocrelizumab both increase immunosuppressive effects; risk of infection. Use Caution/Monitor. Coadministration of ocrelizumab with high doses of corticosteroids is expected to increase the risk of immunosuppression.

• ofatumumab SC

  ofatumumab SC, hydrocortisone. Either increases effects of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Consider the risk of additive immune system effects when coadministering immunosuppressive therapies with coadministration. When switching from therapies with immune effects, take into account the duration and mechanism of action of these therapies when initiating ofatumumab SC.

• ofloxacin

  hydrocortisone and ofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• olodaterol inhaled

  ciprofloxacin and olodaterol inhaled both increase QTc interval. Use Caution/Monitor. Drugs that prolong the QTc interval and may potentiate the effects of beta2 agonists on the cardiovascular system; increased risk of ventricular arrhythmias
  
  hydrocortisone and olodaterol inhaled both decrease serum potassium. Use Caution/Monitor.

• omeprazole

  omeprazole will decrease the level or effect of ciprofloxacin by unknown mechanism. Use Caution/Monitor. Absorption of the ciprofloxacin ER tablet was slightly diminished (20%) when coadministered with omeprazole.

• oxaprozin

  oxaprozin, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• osilodrostat

  osilodrostat and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• osimertinib

  osimertinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor. Conduct periodic monitoring with ECGs and electrolytes in patients taking drugs known to prolong the QTc interval.

• oxaliplatin

  oxaliplatin will increase the level or effect of ciprofloxacin by Other (see comment). Use Caution/Monitor. Monitor for ECG changes if therapy is initiated in patients with drugs known to prolong QT interval.

• oxaprozin

  oxaprozin, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• oxcarbazepine

  oxcarbazepine will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• ozanimod

  ozanimod and ciprofloxacin both increase QTc interval. Modify Therapy/Monitor Closely. The potential additive effects on heart rate, treatment with ozanimod should generally not be initiated in patients who are concurrently treated with QT prolonging drugs with known arrhythmogenic properties.

• paliperidone

  ciprofloxacin and paliperidone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• pancuronium

  pancuronium, hydrocortisone. Other (see comment). Use Caution/Monitor. Comment: Coadministration of corticosteroids and neuromuscular blockers may increase risk of developing acute myopathy.

• parecoxib

  parecoxib, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• pasireotide

  ciprofloxacin and pasireotide both increase QTc interval. Modify Therapy/Monitor Closely.

• patiromer

  patiromer will decrease the level or effect of ciprofloxacin by drug binding in GI tract. Modify Therapy/Monitor Closely. Separate administration by at least 3 hr from patiromer

• pazopanib

  hydrocortisone will decrease the level or effect of pazopanib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• pentamidine

  ciprofloxacin and pentamidine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• pentobarbital

  pentobarbital will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• pentoxifylline

  ciprofloxacin will increase the level or effect of pentoxifylline by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• phenindione

  hydrocortisone, phenindione. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• phenobarbital

  phenobarbital will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  phenobarbital will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• phenytoin

  phenytoin will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  ciprofloxacin decreases effects of phenytoin by unknown mechanism. Use Caution/Monitor. Ciprofloxacin has been reported to both increase and decrease phenytoin concentrations. Additional clinical evidence is needed however; phenytoin serum concentrations should be monitored in patients.
  
  phenytoin will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• pimozide

  ciprofloxacin and pimozide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• piroxicam

  piroxicam, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• pioglitazone

  ciprofloxacin increases effects of pioglitazone by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• piroxicam

  piroxicam, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• poliovirus vaccine inactivated

  hydrocortisone decreases effects of poliovirus vaccine inactivated by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. Avoid vaccination during chemotherapy or radiation therapy if possible because antibody response might be suboptimal. Patients vaccinated within a 14-day period before starting or during immunosuppressive therapy should be revaccinated =3 months after therapy is discontinued if immune competence has been restored. .

• polysaccharide iron

  polysaccharide iron decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• ponatinib

  ponatinib increases levels of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  ponatinib increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• ponesimod

  ponesimod and hydrocortisone both increase immunosuppressive effects; risk of infection. Use Caution/Monitor. Caution if coadministered because of additive immunosuppressive effects during such therapy and in the weeks following administration. When switching from drugs with prolonged immune effects, consider the half-life and mode of action of these drugs to avoid unintended additive immunosuppressive effects.

• prednisolone

  prednisolone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• posaconazole

  posaconazole will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• prednisone

  prednisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.
  
  hydrocortisone will decrease the level or effect of prednisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• pretomanid

  pretomanid will increase the level or effect of ciprofloxacin by Other (see comment). Modify Therapy/Monitor Closely. In vitro studies demonstrated that pretomanid significantly inhibits OAT3; monitor for increased adverse effects and consider dosage reduction for OAT3 substrates.

• primidone

  primidone will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• primaquine

  primaquine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• probenecid

  probenecid will increase the level or effect of ciprofloxacin by Other (see comment). Use Caution/Monitor. Probenecid interferes with renal tubular secretion of ciprofloxacin and produces an increase in the ciprofloxacin levels in the serum

• procainamide

  ciprofloxacin and procainamide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• protamine

  hydrocortisone, protamine. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• quercetin

  quercetin will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• quetiapine

  quetiapine, ciprofloxacin. Either increases toxicity of the other by QTc interval. Use Caution/Monitor. Avoid use with drugs that prolong QT and in patients with risk factors for prolonged QT interval. Postmarketing cases show QT prolongation with overdose in patients with concomitant illness or with drugs known to cause electrolyte imbalance or prolong QT.
  
  hydrocortisone will decrease the level or effect of quetiapine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• quinapril

  quinapril will decrease the level or effect of ciprofloxacin by Other (see comment). Use Caution/Monitor. Separate doses of quinapril and oral quinolones by 2 hr; interaction likely due to chelation

• quinidine

  hydrocortisone will decrease the level or effect of quinidine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• quinidine

  ciprofloxacin and quinidine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• quinine

  ciprofloxacin and quinine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• quinupristin/dalfopristin

  quinupristin/dalfopristin will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• quizartinib

  quizartinib, ciprofloxacin. Either increases effects of the other by QTc interval. Modify Therapy/Monitor Closely. Monitor patients more frequently with ECG if coadministered with QT prolonging drugs.

• ramelteon

  ciprofloxacin will increase the level or effect of ramelteon by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Ciprofloxacin may decrease the metabolism of ramelteon; if ciprofloxacin is coadministered with ramelteon, monitor the patient closely for toxicity.

• ranolazine

  ranolazine will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  ciprofloxacin and ranolazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• repaglinide

  hydrocortisone will decrease the level or effect of repaglinide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin increases effects of repaglinide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• rifampin

  rifampin will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• rilpivirine

  rilpivirine increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Rilpivirine should be used with caution when co-administered with a drug with a known risk of Torsades de Pointes.

• rifapentine

  rifapentine will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• riluzole

  ciprofloxacin will increase the level or effect of riluzole by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• rimonabant

  hydrocortisone will decrease the level or effect of rimonabant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• ritonavir

  ritonavir will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of ritonavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ritonavir will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• rocuronium

  rocuronium, hydrocortisone. Other (see comment). Use Caution/Monitor. Comment: Coadministration of corticosteroids and neuromuscular blockers may increase risk of developing acute myopathy.

• romidepsin

  hydrocortisone will decrease the level or effect of romidepsin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• ropinirole

  ciprofloxacin will increase the level or effect of ropinirole by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Ciprofloxacin may decrease the metabolism of ropinirole; monitor for increased effects of ropinirole.

• ropivacaine

  ciprofloxacin will increase the level or effect of ropivacaine by Mechanism: decreasing metabolism. Use Caution/Monitor. Monitor for increased ropivacaine toxicity.

• rosiglitazone

  ciprofloxacin increases effects of rosiglitazone by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• rufinamide

  rufinamide will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• salicylates (non-asa)

  salicylates (non-asa), hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• salsalate

  salsalate, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• saquinavir

  hydrocortisone will decrease the level or effect of saquinavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin and saquinavir both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• sarecycline

  sarecycline will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor for toxicities of P-gp substrates that may require dosage reduction when coadministered with P-gp inhibitors.
  
  sarecycline will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor for toxicities of P-gp substrates that may require dosage reduction when coadministered with P-gp inhibitors.

• saxagliptin

  ciprofloxacin increases effects of saxagliptin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• secobarbital

  secobarbital will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• selpercatinib

  selpercatinib increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor.

• sertraline

  sertraline and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• sevelamer

  sevelamer decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Administer oral quinolones at least 1 hour before or 3 hours after sevelamer. .

• sildenafil

  hydrocortisone will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• simvastatin

  simvastatin will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• sipuleucel-T

  hydrocortisone decreases effects of sipuleucel-T by pharmacodynamic antagonism. Modify Therapy/Monitor Closely.

• sirolimus

  sirolimus will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• sitagliptin

  ciprofloxacin increases effects of sitagliptin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• sodium bicarbonate

  sodium bicarbonate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. A large proportion of ciprofloxacin is normally excreted unchanged in the urine. When urinary alkalinizing agents such as sodium bicarbonate are used concomitantly, the solubility of ciprofloxacin can be decreased because of alkaline urine. Patients should be monitored for crystalluria and nephrotoxicity.

• sodium citrate/citric acid

  sodium citrate/citric acid decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. A large proportion of ciprofloxacin is normally excreted unchanged in the urine. When urinary alkalinizing agents such as sodium citrate are used concomitantly, the solubility of ciprofloxacin can be decreased because of alkaline urine. Patients should be monitored for crystalluria and nephrotoxicity.

• sodium picosulfate/magnesium oxide/anhydrous citric acid

  ciprofloxacin decreases effects of sodium picosulfate/magnesium oxide/anhydrous citric acid by altering metabolism. Use Caution/Monitor. Coadministration with antibiotics decreases efficacy by altering colonic bacterial flora needed to convert sodium picosulfate to active drug.
  
  sodium picosulfate/magnesium oxide/anhydrous citric acid decreases levels of ciprofloxacin by cation binding in GI tract. Use Caution/Monitor. Take at least 2 hours before and not less than 6 hours after administration of sodium picosulfate, magnesium oxide and anhydrous citric acid to avoid magnesium chelation.
  
  hydrocortisone, sodium picosulfate/magnesium oxide/anhydrous citric acid. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May be associated with fluid and electrolyte imbalances such as hypokalemia.

• sodium sulfate/?magnesium sulfate/potassium chloride

  sodium sulfate/?magnesium sulfate/potassium chloride decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Modify Therapy/Monitor Closely. Administer fluoroquinolones at least 2 hr before and no less than 6 hr after each dose to avoid chelation with magnesium. .
  
  sodium sulfate/?magnesium sulfate/potassium chloride increases toxicity of hydrocortisone by Other (see comment). Use Caution/Monitor. Comment: Coadministration with medications that cause fluid and electrolyte abnormalities may increase the risk of adverse events of seizure, arrhythmias, and renal impairment.

• sodium sulfate/potassium chloride/magnesium sulfate/polyethylene glycol

  hydrocortisone and sodium sulfate/potassium chloride/magnesium sulfate/polyethylene glycol both decrease serum potassium. Modify Therapy/Monitor Closely.

• sodium sulfate/potassium sulfate/magnesium sulfate

  sodium sulfate/potassium sulfate/magnesium sulfate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Modify Therapy/Monitor Closely. Administer fluoroquinolones at least 2 hr before and no less than 6 hr after each dose to avoid chelation with magnesium. .

• sodium sulfate/potassium sulfate/magnesium sulfate

  sodium sulfate/potassium sulfate/magnesium sulfate increases toxicity of hydrocortisone by Other (see comment). Use Caution/Monitor. Comment: Coadministration with medications that cause fluid and electrolyte abnormalities may increase the risk of adverse events of seizure, arrhythmias, and renal impairment.

• solifenacin

  solifenacin and ciprofloxacin both increase QTc interval. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of solifenacin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• somapacitan

  somapacitan decreases effects of hydrocortisone by Other (see comment). Modify Therapy/Monitor Closely. Comment: Microsomal enzyme 11-beta-hydroxysteroid dehydrogenase type 1 (11-beta-HSD-1) required for cortisone conversion to its active metabolite, cortisol, in hepatic and adipose tissue. GH inhibits 11-beta-HSD-1. Patients treated with glucocorticoid for hypoadrenalism may require increased maintenance or stress doses after initiating somapacitan.
  
  hydrocortisone decreases effects of somapacitan by pharmacodynamic antagonism. Use Caution/Monitor. Supraphysiologic glucocorticoid treatment may attenuate growth-promoting effects of growth hormone (GH). Microsomal enzyme 11-beta-hydroxysteroid dehydrogenase type 1 (11-beta-HSD-1) is required for conversion of cortisone to its active metabolite, cortisol, in hepatic and adipose tissue. GH inhibits 11-beta-HSD-1. Consequently, individuals with untreated GH deficiency have relative increases in 11-beta-HSD-1 and serum cortisol. Initiation of GH analogs may result in inhibition of 11-beta-HSD-1 and reduced serum cortisol concentrations.

• sorafenib

  sorafenib and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• somatrem

  hydrocortisone decreases effects of somatrem by pharmacodynamic antagonism. Use Caution/Monitor.

• somatrogon

  hydrocortisone decreases effects of somatrogon by pharmacodynamic antagonism. Use Caution/Monitor. Supraphysiologic glucocorticoid treatment may attenuate growth-promoting effects of growth hormone (GH). Microsomal enzyme 11-beta-hydroxysteroid dehydrogenase type 1 (11-beta-HSD-1) is required for conversion of cortisone to its active metabolite, cortisol, in hepatic and adipose tissue. GH inhibits 11-beta-HSD-1. Consequently, individuals with untreated GH deficiency have relative increases in 11-beta-HSD-1 and serum cortisol. Initiation of GH analogs may result in inhibition of 11-beta-HSD-1 and reduced serum cortisol concentrations.

• somatropin

  hydrocortisone decreases effects of somatropin by pharmacodynamic antagonism. Use Caution/Monitor. Supraphysiologic glucocorticoid treatment may attenuate growth-promoting effects of growth hormone (GH). Microsomal enzyme 11-beta-hydroxysteroid dehydrogenase type 1 (11-beta-HSD-1) is required for conversion of cortisone to its active metabolite, cortisol, in hepatic and adipose tissue. GH inhibits 11-beta-HSD-1. Consequently, individuals with untreated GH deficiency have relative increases in 11-beta-HSD-1 and serum cortisol. Initiation of GH analogs may result in inhibition of 11-beta-HSD-1 and reduced serum cortisol concentrations.

• sorafenib

  hydrocortisone decreases levels of sorafenib by increasing metabolism. Use Caution/Monitor.

• St John's Wort

  St John's Wort will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• sotalol

  ciprofloxacin and sotalol both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• stiripentol

  stiripentol will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Consider reducing the dose of P-glycoprotein (P-gp) substrates, if adverse reactions are experienced when administered concomitantly with stiripentol.
  
  stiripentol will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Consider reducing the dose of P-glycoprotein (P-gp) substrates, if adverse reactions are experienced when administered concomitantly with stiripentol.

• succinylcholine

  succinylcholine, hydrocortisone. Other (see comment). Use Caution/Monitor. Comment: Coadministration of corticosteroids and neuromuscular blockers may increase risk of developing acute myopathy.

• sucralfate

  sucralfate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. The oral absorption of ciprofloxacin may be significantly reduced by sucralfate secondary to chelation within the GI tract. To help avoid interactions due to chelation, ciprofloxacin should be taken 2 hours before or 6 hours after administration of sucralfate.

• sulfasalazine

  sulfasalazine, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• sulindac

  sulindac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  sulindac, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• sunitinib

  hydrocortisone will decrease the level or effect of sunitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin and sunitinib both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• tacrolimus

  hydrocortisone will decrease the level or effect of tacrolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  tacrolimus and ciprofloxacin both increase QTc interval. Use Caution/Monitor.
  
  tacrolimus will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• tasimelteon

  ciprofloxacin will increase the level or effect of tasimelteon by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Avoid coadministration; potentially large increase in tasimelteon exposure and greater risk of adverse reactions with strong CYP1A2 inhibitors

• tazemetostat

  hydrocortisone will decrease the level or effect of tazemetostat by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• telavancin

  ciprofloxacin and telavancin both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• temsirolimus

  hydrocortisone will decrease the level or effect of temsirolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• terbinafine

  ciprofloxacin will increase the level or effect of terbinafine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• tetrabenazine

  ciprofloxacin and tetrabenazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• theophylline

  hydrocortisone will decrease the level or effect of theophylline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• thioridazine

  ciprofloxacin and thioridazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• tinidazole

  ciprofloxacin will increase the level or effect of tinidazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• tinzaparin

  hydrocortisone, tinzaparin. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• tipranavir

  hydrocortisone will decrease the level or effect of tipranavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• tobramycin inhaled

  tobramycin inhaled and ciprofloxacin both increase nephrotoxicity and/or ototoxicity. Modify Therapy/Monitor Closely. Avoid concurrent or sequential use to decrease risk for ototoxicity

• tolazamide

  ciprofloxacin increases effects of tolazamide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• tolbutamide

  ciprofloxacin increases effects of tolbutamide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• tolfenamic acid

  tolfenamic acid, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• tolmetin

  tolmetin, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  tolmetin, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• tolterodine

  hydrocortisone will decrease the level or effect of tolterodine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• triamcinolone acetonide injectable suspension

  triamcinolone acetonide injectable suspension and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• tolvaptan

  tolvaptan will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• topiramate

  topiramate will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• trastuzumab

  trastuzumab, hydrocortisone. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .

• trastuzumab deruxtecan

  trastuzumab deruxtecan, hydrocortisone. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .

• trazodone

  hydrocortisone will decrease the level or effect of trazodone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  trazodone will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• triamcinolone acetonide injectable suspension

  hydrocortisone will decrease the level or effect of triamcinolone acetonide injectable suspension by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• triazolam

  hydrocortisone will decrease the level or effect of triazolam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• trimagnesium citrate anhydrous

  trimagnesium citrate anhydrous decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Multivalent cation-containing products may reduce bioavailability of quinolones; administer quinolone at least 2 hr before or 6 hr after magnesium; use alternatives if available.

• triptorelin

  triptorelin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• tucatinib

  tucatinib will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Consider reducing the dosage of P-gp substrates, where minimal concentration changes may lead to serious or life-threatening toxicities.
  
  tucatinib will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Consider reducing the dosage of P-gp substrates, where minimal concentration changes may lead to serious or life-threatening toxicities.

• ublituximab

  ublituximab and hydrocortisone both increase immunosuppressive effects; risk of infection. Modify Therapy/Monitor Closely. Owing to potential additive immunosuppressive effects, consider duration of effect and mechanism of action of these therapies if coadministered

• valbenazine

  valbenazine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• ubrogepant

  hydrocortisone will decrease the level or effect of ubrogepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Dose adjustment is recommended with concomitant use of ubrogepant and moderate and weak CYP3A4 inducers. (see Dosage Modifications)

• vardenafil

  hydrocortisone will decrease the level or effect of vardenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• vecuronium

  vecuronium, hydrocortisone. Other (see comment). Use Caution/Monitor. Comment: Coadministration of corticosteroids and neuromuscular blockers may increase risk of developing acute myopathy.

• verapamil

  verapamil will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of verapamil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  verapamil will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• vildagliptin

  ciprofloxacin increases effects of vildagliptin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.

• voclosporin

  voclosporin, ciprofloxacin. Either increases effects of the other by QTc interval. Use Caution/Monitor.

• voriconazole

  voriconazole will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• vorinostat

  vorinostat and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• warfarin

  hydrocortisone increases effects of warfarin by unspecified interaction mechanism. Use Caution/Monitor.
  
  ciprofloxacin increases effects of warfarin by unspecified interaction mechanism. Use Caution/Monitor.

• xipamide

  xipamide, hydrocortisone. pharmacodynamic synergism. Use Caution/Monitor. Risk of hypokalemia.

• zinc

  zinc will decrease the level or effect of ciprofloxacin by cation binding in GI tract. Modify Therapy/Monitor Closely. Ciprofloxacin should be administered 2 hr before or 6 hr after zinc salts.

• zafirlukast

  zafirlukast will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• ziprasidone

  ciprofloxacin and ziprasidone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• zolpidem

  ciprofloxacin will increase the level or effect of zolpidem by affecting hepatic enzyme CYP1A2 metabolism. Modify Therapy/Monitor Closely.
  
  ciprofloxacin will increase the level or effect of zolpidem by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely.

• zoster vaccine recombinant

  hydrocortisone decreases effects of zoster vaccine recombinant by pharmacodynamic antagonism. Use Caution/Monitor. Immunosuppressive therapies may reduce the effectiveness of zoster vaccine recombinant.

Minor (166)

• acarbose

  hydrocortisone decreases effects of acarbose by pharmacodynamic antagonism. Minor/Significance Unknown.

• acebutolol

  ciprofloxacin increases levels of acebutolol by decreasing metabolism. Minor/Significance Unknown. May also rarely decrease beta blocker levels.

• alfentanil

  hydrocortisone will decrease the level or effect of alfentanil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• alfuzosin

  hydrocortisone will decrease the level or effect of alfuzosin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• aliskiren

  hydrocortisone will decrease the level or effect of aliskiren by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• alosetron

  hydrocortisone will decrease the level or effect of alosetron by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• alprazolam

  ciprofloxacin increases levels of alprazolam by decreasing metabolism. Minor/Significance Unknown.

• amitriptyline

  hydrocortisone will decrease the level or effect of amitriptyline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• amlodipine

  hydrocortisone will decrease the level or effect of amlodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• amphotericin B deoxycholate

  amphotericin B deoxycholate, hydrocortisone. Mechanism: unspecified interaction mechanism. Minor/Significance Unknown. Potential for hypokalemia.

• armodafinil

  hydrocortisone will decrease the level or effect of armodafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• aspirin

  hydrocortisone decreases levels of aspirin by increasing renal clearance. Minor/Significance Unknown.

• aspirin rectal

  hydrocortisone decreases levels of aspirin rectal by increasing renal clearance. Minor/Significance Unknown.

• aspirin/citric acid/sodium bicarbonate

  hydrocortisone decreases levels of aspirin/citric acid/sodium bicarbonate by increasing renal clearance. Minor/Significance Unknown.

• atazanavir

  hydrocortisone will decrease the level or effect of atazanavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• balsalazide

  hydrocortisone decreases levels of balsalazide by increasing renal clearance. Minor/Significance Unknown.
  
  ciprofloxacin will decrease the level or effect of balsalazide by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• bendroflumethiazide

  hydrocortisone, bendroflumethiazide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• carvedilol

  ciprofloxacin increases levels of carvedilol by decreasing metabolism. Minor/Significance Unknown. May also rarely decrease beta blocker levels.

• bexarotene

  hydrocortisone will decrease the level or effect of bexarotene by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• bosentan

  hydrocortisone will decrease the level or effect of bosentan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• bumetanide

  hydrocortisone, bumetanide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• calcium acetate

  hydrocortisone decreases levels of calcium acetate by increasing elimination. Minor/Significance Unknown.

• calcium carbonate

  hydrocortisone decreases levels of calcium carbonate by increasing elimination. Minor/Significance Unknown.

• calcium chloride

  hydrocortisone decreases levels of calcium chloride by increasing elimination. Minor/Significance Unknown.

• calcium citrate

  hydrocortisone decreases levels of calcium citrate by increasing elimination. Minor/Significance Unknown.

• calcium gluconate

  hydrocortisone decreases levels of calcium gluconate by increasing elimination. Minor/Significance Unknown.

• cevimeline

  hydrocortisone will decrease the level or effect of cevimeline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• chlordiazepoxide

  ciprofloxacin increases levels of chlordiazepoxide by decreasing metabolism. Minor/Significance Unknown.

• chlorothiazide

  hydrocortisone, chlorothiazide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• chlorpropamide

  hydrocortisone decreases effects of chlorpropamide by pharmacodynamic antagonism. Minor/Significance Unknown.

• chlorthalidone

  hydrocortisone, chlorthalidone. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• choline magnesium trisalicylate

  hydrocortisone decreases levels of choline magnesium trisalicylate by increasing renal clearance. Minor/Significance Unknown.

• chromium

  hydrocortisone decreases levels of chromium by increasing renal clearance. Minor/Significance Unknown.

• clarithromycin

  hydrocortisone will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• clomethiazole

  hydrocortisone will decrease the level or effect of clomethiazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• clomipramine

  hydrocortisone will decrease the level or effect of clomipramine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• clonazepam

  ciprofloxacin increases levels of clonazepam by decreasing metabolism. Minor/Significance Unknown.

• clorazepate

  ciprofloxacin increases levels of clorazepate by decreasing metabolism. Minor/Significance Unknown.

• colestipol

  colestipol decreases levels of hydrocortisone by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.

• cyclopenthiazide

  hydrocortisone, cyclopenthiazide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• cyclosporine

  hydrocortisone, cyclosporine. Either increases levels of the other by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• danazol

  danazol, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• dapsone

  hydrocortisone will decrease the level or effect of dapsone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• delavirdine

  hydrocortisone will decrease the level or effect of delavirdine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• diazepam

  ciprofloxacin increases levels of diazepam by decreasing metabolism. Minor/Significance Unknown.

• diflunisal

  hydrocortisone decreases levels of diflunisal by increasing renal clearance. Minor/Significance Unknown.

• digoxin

  ciprofloxacin will increase the level or effect of digoxin by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• disopyramide

  hydrocortisone will decrease the level or effect of disopyramide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• docetaxel

  hydrocortisone will decrease the level or effect of docetaxel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• donepezil

  hydrocortisone will decrease the level or effect of donepezil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• doxorubicin

  hydrocortisone will decrease the level or effect of doxorubicin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• doxorubicin liposomal

  hydrocortisone will decrease the level or effect of doxorubicin liposomal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• dutasteride

  hydrocortisone will decrease the level or effect of dutasteride by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• efavirenz

  hydrocortisone will decrease the level or effect of efavirenz by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• eplerenone

  hydrocortisone will decrease the level or effect of eplerenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• eslicarbazepine acetate

  eslicarbazepine acetate will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• esmolol

  ciprofloxacin increases levels of esmolol by decreasing metabolism. Minor/Significance Unknown.

• estazolam

  ciprofloxacin increases levels of estazolam by decreasing metabolism. Minor/Significance Unknown.

• ethacrynic acid

  hydrocortisone, ethacrynic acid. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• etoposide

  hydrocortisone will decrease the level or effect of etoposide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• etoricoxib

  hydrocortisone will decrease the level or effect of etoricoxib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• eucalyptus

  hydrocortisone will decrease the level or effect of eucalyptus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• exemestane

  hydrocortisone will decrease the level or effect of exemestane by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• fennel

  fennel decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown. Fennel may decrease the amount of ciprofloxacin the body absorbs. Take fennel at least 1 hour after ciprofloxacin administration.

• feverfew

  hydrocortisone decreases effects of feverfew by pharmacodynamic antagonism. Minor/Significance Unknown.

• finasteride

  hydrocortisone will decrease the level or effect of finasteride by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• fluoxymesterone

  fluoxymesterone, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• flurazepam

  ciprofloxacin increases levels of flurazepam by decreasing metabolism. Minor/Significance Unknown.

• foscarnet

  ciprofloxacin, foscarnet. Mechanism: unknown. Minor/Significance Unknown. Based on 2 case reports it was reported that there is a potential for an increased risk of seizures.

• frovatriptan

  ciprofloxacin will increase the level or effect of frovatriptan by affecting hepatic enzyme CYP1A2 metabolism. Minor/Significance Unknown.

• furosemide

  hydrocortisone, furosemide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• galantamine

  hydrocortisone will decrease the level or effect of galantamine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• glimepiride

  hydrocortisone decreases effects of glimepiride by pharmacodynamic antagonism. Minor/Significance Unknown.

• glipizide

  hydrocortisone decreases effects of glipizide by pharmacodynamic antagonism. Minor/Significance Unknown.

• gliquidone

  hydrocortisone decreases effects of gliquidone by pharmacodynamic antagonism. Minor/Significance Unknown.

• glyburide

  hydrocortisone decreases effects of glyburide by pharmacodynamic antagonism. Minor/Significance Unknown.

• green tea

  ciprofloxacin increases levels of green tea by decreasing elimination. Minor/Significance Unknown. (Caffeine). Some quinolones can inhibit the hepatic clearance of caffeine. Caution is advised.

• hydrochlorothiazide

  hydrocortisone, hydrochlorothiazide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• imatinib

  hydrocortisone will decrease the level or effect of imatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• imipramine

  hydrocortisone will decrease the level or effect of imipramine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• indapamide

  hydrocortisone, indapamide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• insulin aspart

  hydrocortisone decreases effects of insulin aspart by pharmacodynamic antagonism. Minor/Significance Unknown.

• insulin detemir

  hydrocortisone decreases effects of insulin detemir by pharmacodynamic antagonism. Minor/Significance Unknown.

• insulin glargine

  hydrocortisone decreases effects of insulin glargine by pharmacodynamic antagonism. Minor/Significance Unknown.

• insulin glulisine

  hydrocortisone decreases effects of insulin glulisine by pharmacodynamic antagonism. Minor/Significance Unknown.

• insulin lispro

  hydrocortisone decreases effects of insulin lispro by pharmacodynamic antagonism. Minor/Significance Unknown.

• insulin NPH

  hydrocortisone decreases effects of insulin NPH by pharmacodynamic antagonism. Minor/Significance Unknown.

• insulin regular human

  hydrocortisone decreases effects of insulin regular human by pharmacodynamic antagonism. Minor/Significance Unknown.

• isoniazid

  hydrocortisone decreases effects of isoniazid by unknown mechanism. Minor/Significance Unknown.

• isotretinoin

  ciprofloxacin, isotretinoin. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Both drugs have increased risk of phototoxicity, use caution with concomitant use.

• isradipine

  hydrocortisone will decrease the level or effect of isradipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• itraconazole

  hydrocortisone will decrease the level or effect of itraconazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• ketoconazole

  hydrocortisone will decrease the level or effect of ketoconazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• levoketoconazole

  hydrocortisone will decrease the level or effect of levoketoconazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• mesalamine

  hydrocortisone decreases levels of mesalamine by increasing renal clearance. Minor/Significance Unknown.

• mesterolone

  mesterolone, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• metformin

  hydrocortisone decreases effects of metformin by pharmacodynamic antagonism. Minor/Significance Unknown.

• methyclothiazide

  hydrocortisone, methyclothiazide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• methyltestosterone

  methyltestosterone, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• metolazone

  hydrocortisone, metolazone. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• metoprolol

  ciprofloxacin increases levels of metoprolol by decreasing metabolism. Minor/Significance Unknown. Ciprofloxacin may increase metoprolol plasma concentrations however mechanism is unknown. Further clinical evidence is needed but it may be appropriate to monitor patients during concomitant therapy with ciprofloxacin.

• metyrapone

  hydrocortisone decreases effects of metyrapone by unspecified interaction mechanism. Minor/Significance Unknown.

• mibefradil

  hydrocortisone will decrease the level or effect of mibefradil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• midazolam

  ciprofloxacin increases levels of midazolam by decreasing metabolism. Minor/Significance Unknown.

• miglitol

  hydrocortisone decreases effects of miglitol by pharmacodynamic antagonism. Minor/Significance Unknown.

• montelukast

  hydrocortisone will decrease the level or effect of montelukast by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• nadolol

  ciprofloxacin increases levels of nadolol by decreasing metabolism. Minor/Significance Unknown.

• nateglinide

  hydrocortisone decreases effects of nateglinide by pharmacodynamic antagonism. Minor/Significance Unknown.

• nebivolol

  ciprofloxacin increases levels of nebivolol by decreasing metabolism. Minor/Significance Unknown.

• nifedipine

  hydrocortisone will decrease the level or effect of nifedipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• nimodipine

  hydrocortisone will decrease the level or effect of nimodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• nitrendipine

  hydrocortisone will decrease the level or effect of nitrendipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• oxandrolone

  oxandrolone, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• oxybutynin

  hydrocortisone will decrease the level or effect of oxybutynin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• oxymetholone

  oxymetholone, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• paclitaxel

  hydrocortisone will decrease the level or effect of paclitaxel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• paclitaxel protein bound

  hydrocortisone will decrease the level or effect of paclitaxel protein bound by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• parecoxib

  hydrocortisone will decrease the level or effect of parecoxib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• penbutolol

  ciprofloxacin increases levels of penbutolol by decreasing metabolism. Minor/Significance Unknown.

• pimozide

  hydrocortisone will decrease the level or effect of pimozide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• pindolol

  ciprofloxacin increases levels of pindolol by decreasing metabolism. Minor/Significance Unknown.

• pioglitazone

  hydrocortisone will decrease the level or effect of pioglitazone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
  
  hydrocortisone decreases effects of pioglitazone by pharmacodynamic antagonism. Minor/Significance Unknown.

• porfimer

  hydrocortisone decreases levels of porfimer by unspecified interaction mechanism. Minor/Significance Unknown.

• prednisolone

  hydrocortisone will decrease the level or effect of prednisolone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• propafenone

  hydrocortisone will decrease the level or effect of propafenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• propranolol

  ciprofloxacin increases levels of propranolol by decreasing metabolism. Minor/Significance Unknown.

• pyridoxine

  ciprofloxacin will decrease the level or effect of pyridoxine by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• quazepam

  ciprofloxacin increases levels of quazepam by decreasing metabolism. Minor/Significance Unknown.

• quercetin

  quercetin decreases effects of ciprofloxacin by pharmacodynamic antagonism. Minor/Significance Unknown.

• quinine

  hydrocortisone will decrease the level or effect of quinine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• rabeprazole

  hydrocortisone will decrease the level or effect of rabeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• ramelteon

  hydrocortisone will decrease the level or effect of ramelteon by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• repaglinide

  hydrocortisone decreases effects of repaglinide by pharmacodynamic antagonism. Minor/Significance Unknown.

• rosiglitazone

  hydrocortisone decreases effects of rosiglitazone by pharmacodynamic antagonism. Minor/Significance Unknown.

• ruxolitinib

  ciprofloxacin will increase the level or effect of ruxolitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• ruxolitinib topical

  ciprofloxacin will increase the level or effect of ruxolitinib topical by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• salicylates (non-asa)

  hydrocortisone decreases levels of salicylates (non-asa) by increasing renal clearance. Minor/Significance Unknown.

• salsalate

  hydrocortisone decreases levels of salsalate by increasing renal clearance. Minor/Significance Unknown.

• sargramostim

  hydrocortisone increases effects of sargramostim by pharmacodynamic synergism. Minor/Significance Unknown.

• saxagliptin

  hydrocortisone will decrease the level or effect of saxagliptin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
  
  hydrocortisone decreases effects of saxagliptin by pharmacodynamic antagonism. Minor/Significance Unknown.

• sitagliptin

  hydrocortisone decreases effects of sitagliptin by pharmacodynamic antagonism. Minor/Significance Unknown.

• sufentanil

  hydrocortisone will decrease the level or effect of sufentanil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• sulfasalazine

  hydrocortisone decreases levels of sulfasalazine by increasing renal clearance. Minor/Significance Unknown.

• tacrolimus

  hydrocortisone, tacrolimus. Either increases levels of the other by decreasing metabolism. Minor/Significance Unknown.

• tamoxifen

  hydrocortisone will decrease the level or effect of tamoxifen by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• telithromycin

  hydrocortisone will decrease the level or effect of telithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• temazepam

  ciprofloxacin increases levels of temazepam by decreasing metabolism. Minor/Significance Unknown.

• testosterone

  testosterone, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• testosterone buccal system

  testosterone buccal system, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• testosterone topical

  testosterone topical, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• thiamine

  ciprofloxacin will decrease the level or effect of thiamine by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• timolol

  ciprofloxacin increases levels of timolol by decreasing metabolism. Minor/Significance Unknown. May also rarely decrease beta blocker levels.

• tolazamide

  hydrocortisone decreases effects of tolazamide by pharmacodynamic antagonism. Minor/Significance Unknown.

• tolbutamide

  hydrocortisone decreases effects of tolbutamide by pharmacodynamic antagonism. Minor/Significance Unknown.

• torsemide

  hydrocortisone, torsemide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• triazolam

  ciprofloxacin increases levels of triazolam by decreasing metabolism. Minor/Significance Unknown.

• troglitazone

  hydrocortisone decreases effects of troglitazone by pharmacodynamic antagonism. Minor/Significance Unknown.

• troleandomycin

  hydrocortisone will decrease the level or effect of troleandomycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• vesnarinone

  hydrocortisone will decrease the level or effect of vesnarinone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• vildagliptin

  hydrocortisone decreases effects of vildagliptin by pharmacodynamic antagonism. Minor/Significance Unknown.

• vinblastine

  hydrocortisone will decrease the level or effect of vinblastine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• vincristine

  hydrocortisone will decrease the level or effect of vincristine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• vincristine liposomal

  hydrocortisone will decrease the level or effect of vincristine liposomal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• vinorelbine

  hydrocortisone will decrease the level or effect of vinorelbine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• vitamin K1 (phytonadione)

  ciprofloxacin will decrease the level or effect of vitamin K1 (phytonadione) by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• willow bark

  hydrocortisone decreases levels of willow bark by increasing renal clearance. Minor/Significance Unknown.

• acarbose

  Monitor Closely (1)ciprofloxacin increases effects of acarbose by pharmacodynamic synergism. Use Caution/Monitor. Quinolone antibiotic administration may result in hyper- or hypoglycemia. .Minor (1)hydrocortisone decreases effects of acarbose by pharmacodynamic antagonism. Minor/Significance Unknown.

• acebutolol

  Minor (1)ciprofloxacin increases levels of acebutolol by decreasing metabolism. Minor/Significance Unknown. May also rarely decrease beta blocker levels.

• aceclofenac

  Monitor Closely (1)aceclofenac, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• acemetacin

  Monitor Closely (1)acemetacin, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• adenovirus types 4 and 7 live, oral

  Serious - Use Alternative (1)hydrocortisone decreases effects of adenovirus types 4 and 7 live, oral by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Corticosteroids may diminish therapeutic effects of vaccines and increase risk of adverse effects (increased risk of infection). Live-attenuated vaccines should be avoided for at least 3mo after cessation of corticosteroid therapy.

• albiglutide

  Monitor Closely (1)hydrocortisone decreases effects of albiglutide by pharmacodynamic antagonism. Use Caution/Monitor. Corticosteroids may diminish hypoglycemic effect of antidiabetic agents. Monitor blood glucose levels carefully. .

• albuterol

  Monitor Closely (1)albuterol and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• aldesleukin

  Serious - Use Alternative (1)hydrocortisone decreases effects of aldesleukin by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Avoid combination because corticosteroids can potentially diminish the antineoplastic effects of aldesleukin.

• alfentanil

  Minor (1)hydrocortisone will decrease the level or effect of alfentanil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• alfuzosin

  Monitor Closely (2)alfuzosin and ciprofloxacin both increase QTc interval. Use Caution/Monitor.
  
  ciprofloxacin and alfuzosin both increase QTc interval. Use Caution/Monitor.Minor (1)hydrocortisone will decrease the level or effect of alfuzosin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• aliskiren

  Minor (1)hydrocortisone will decrease the level or effect of aliskiren by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• alitretinoin

  Monitor Closely (1)hydrocortisone will decrease the level or effect of alitretinoin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• almotriptan

  Monitor Closely (1)hydrocortisone will decrease the level or effect of almotriptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• alosetron

  Minor (1)hydrocortisone will decrease the level or effect of alosetron by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of alosetron by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Alosetron is associated with potentially serious and life-threatening, dose-related gastrointestinal adverse effects, concomitant use with CYP450 1A2 inhibitors should generally be avoided if possible.

• alprazolam

  Monitor Closely (1)hydrocortisone will decrease the level or effect of alprazolam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.Minor (1)ciprofloxacin increases levels of alprazolam by decreasing metabolism. Minor/Significance Unknown.

• aluminum hydroxide

  Serious - Use Alternative (1)aluminum hydroxide decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Separate by 2 hours.

• amifampridine

  Monitor Closely (1)ciprofloxacin increases toxicity of amifampridine by Other (see comment). Modify Therapy/Monitor Closely. Comment: Amifampridine can cause seizures. Coadministration with drugs that lower seizure threshold may increase this risk.

• aminolevulinic acid oral

  Serious - Use Alternative (1)aminolevulinic acid oral, ciprofloxacin. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Avoid administering other phototoxic drugs with aminolevulinic acid oral for 24 hr during perioperative period.

• aminolevulinic acid topical

  Serious - Use Alternative (1)ciprofloxacin increases toxicity of aminolevulinic acid topical by pharmacodynamic synergism. Avoid or Use Alternate Drug. Coadministration of photosensitizing drugs may enhance the phototoxic reaction to photodynamic therapy with aminolevulinic acid.

• amiodarone

  Monitor Closely (3)hydrocortisone will decrease the level or effect of amiodarone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  amiodarone will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  ciprofloxacin and amiodarone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• amisulpride

  Serious - Use Alternative (1)amisulpride and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. ECG monitoring is recommended if coadministered.

• amitriptyline

  Minor (1)hydrocortisone will decrease the level or effect of amitriptyline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• amlodipine

  Minor (1)hydrocortisone will decrease the level or effect of amlodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• amobarbital

  Monitor Closely (1)amobarbital will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• amphotericin B deoxycholate

  Minor (1)amphotericin B deoxycholate, hydrocortisone. Mechanism: unspecified interaction mechanism. Minor/Significance Unknown. Potential for hypokalemia.

• anagrelide

  Serious - Use Alternative (1)anagrelide and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• anthrax vaccine

  Serious - Use Alternative (1)hydrocortisone decreases effects of anthrax vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• antithrombin alfa

  Monitor Closely (1)hydrocortisone, antithrombin alfa. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• antithrombin III

  Monitor Closely (1)hydrocortisone, antithrombin III. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• aprepitant

  Monitor Closely (2)aprepitant will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of aprepitant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• arformoterol

  Monitor Closely (1)arformoterol and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• argatroban

  Monitor Closely (1)hydrocortisone, argatroban. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• aripiprazole

  Monitor Closely (2)hydrocortisone will decrease the level or effect of aripiprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  aripiprazole and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• armodafinil

  Monitor Closely (1)armodafinil will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.Minor (1)hydrocortisone will decrease the level or effect of armodafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• arsenic trioxide

  Monitor Closely (1)ciprofloxacin and arsenic trioxide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• artemether

  Monitor Closely (1)ciprofloxacin and artemether both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• artemether/lumefantrine

  Monitor Closely (3)artemether/lumefantrine will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin and artemether/lumefantrine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.
  
  hydrocortisone will decrease the level or effect of artemether/lumefantrine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• asenapine

  Monitor Closely (2)ciprofloxacin will increase the level or effect of asenapine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Asenapine has been associated with dose-related prolongation of the QT interval; asenapine should not be used with other agents also known to have this effect.
  
  ciprofloxacin and asenapine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• asenapine transdermal

  Monitor Closely (1)asenapine transdermal and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• aspirin

  Monitor Closely (2)aspirin decreases levels of ciprofloxacin by Other (see comment). Use Caution/Monitor. Comment: Buffered aspirin may decrease absorption of quinolones. Consider administering 2 hr before or 6 hr after, buffered aspirin administration.
  
  aspirin, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.Minor (1)hydrocortisone decreases levels of aspirin by increasing renal clearance. Minor/Significance Unknown.

• aspirin rectal

  Monitor Closely (1)aspirin rectal, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.Minor (1)hydrocortisone decreases levels of aspirin rectal by increasing renal clearance. Minor/Significance Unknown.

• aspirin/citric acid/sodium bicarbonate

  Monitor Closely (2)aspirin/citric acid/sodium bicarbonate, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  aspirin/citric acid/sodium bicarbonate decreases levels of ciprofloxacin by Other (see comment). Use Caution/Monitor. Comment: Buffered aspirin may decrease absorption of quinolones. Consider administering 2 hr before or 6 hr after, buffered aspirin administration.Minor (1)hydrocortisone decreases levels of aspirin/citric acid/sodium bicarbonate by increasing renal clearance. Minor/Significance Unknown.

• astemizole

  Serious - Use Alternative (1)hydrocortisone will decrease the level or effect of astemizole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• atazanavir

  Monitor Closely (1)atazanavir will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.Minor (1)hydrocortisone will decrease the level or effect of atazanavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• atogepant

  Monitor Closely (2)hydrocortisone will decrease the level or effect of atogepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin will increase the level or effect of atogepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• atomoxetine

  Monitor Closely (1)atomoxetine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• atorvastatin

  Monitor Closely (2)hydrocortisone will decrease the level or effect of atorvastatin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  atorvastatin will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• atracurium

  Monitor Closely (1)atracurium, hydrocortisone. Other (see comment). Use Caution/Monitor. Comment: Coadministration of corticosteroids and neuromuscular blockers may increase risk of developing acute myopathy.

• avapritinib

  Monitor Closely (1)ciprofloxacin will increase the level or effect of avapritinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• axicabtagene ciloleucel

  Serious - Use Alternative (1)hydrocortisone, axicabtagene ciloleucel. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug. Consider the use of prophylactic corticosteroid in patients after weighing the potential benefits and risks. Corticosteroids may, however, be required for treatment of cytokine release syndrome or neurologic toxicity.

• axitinib

  Monitor Closely (2)ciprofloxacin increases levels of axitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone decreases levels of axitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• azithromycin

  Monitor Closely (1)azithromycin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor.

• balsalazide

  Minor (2)hydrocortisone decreases levels of balsalazide by increasing renal clearance. Minor/Significance Unknown.
  
  ciprofloxacin will decrease the level or effect of balsalazide by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• bazedoxifene/conjugated estrogens

  Monitor Closely (2)hydrocortisone will decrease the level or effect of bazedoxifene/conjugated estrogens by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin will decrease the level or effect of bazedoxifene/conjugated estrogens by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• BCG vaccine live

  Serious - Use Alternative (2)hydrocortisone decreases effects of BCG vaccine live by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.
  
  ciprofloxacin decreases effects of BCG vaccine live by pharmacodynamic antagonism. Contraindicated. Antibiotics may diminish therapeutic effects of BCG. Wait until Abx Tx complete to administer live bacterial vaccine.

• bedaquiline

  Monitor Closely (1)ciprofloxacin and bedaquiline both increase QTc interval. Modify Therapy/Monitor Closely. ECG should be monitored closely

• belatacept

  Monitor Closely (1)belatacept and hydrocortisone both increase immunosuppressive effects; risk of infection. Use Caution/Monitor.

• bemiparin

  Monitor Closely (1)hydrocortisone, bemiparin. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• benazepril

  Monitor Closely (1)benazepril increases toxicity of ciprofloxacin by unknown mechanism. Use Caution/Monitor. ACE Inhibitors may increase arrhythmogenic potential of ciprofloxacin, possibly by increasing serum potassium levels.

• bendamustine

  Monitor Closely (1)ciprofloxacin increases levels of bendamustine by decreasing metabolism. Use Caution/Monitor. Decreased conversion of bendamustine to active metabolites. Concurrent administration of a CYP1A2 inhibitor such as ciprofloxacin may increase bendamustine concentrations. .

• bendroflumethiazide

  Minor (1)hydrocortisone, bendroflumethiazide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• berotralstat

  Monitor Closely (2)berotralstat will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor or titrate P-gp substrate dose if coadministered.
  
  berotralstat will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor or titrate P-gp substrate dose if coadministered.

• betamethasone

  Monitor Closely (1)betamethasone, ciprofloxacin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• betaxolol

  Monitor Closely (1)ciprofloxacin increases levels of betaxolol by decreasing metabolism. Use Caution/Monitor. Consider modifying therapy; CYP1A2 inhibitors may decrease metabolism of 1A2 substrates.

• bexarotene

  Minor (1)hydrocortisone will decrease the level or effect of bexarotene by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• biotin

  Monitor Closely (1)biotin will decrease the level or effect of ciprofloxacin by altering intestinal flora. Applies only to oral form of both agents. Use Caution/Monitor. Administer ciprofloxacin 4 hours before or 2 hours after biotin.

• bivalirudin

  Monitor Closely (1)hydrocortisone, bivalirudin. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• bosentan

  Monitor Closely (1)bosentan will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.Minor (1)hydrocortisone will decrease the level or effect of bosentan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• bosutinib

  Monitor Closely (2)bosutinib increases levels of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  bosutinib increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• brexucabtagene autoleucel

  Serious - Use Alternative (1)hydrocortisone, brexucabtagene autoleucel. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug. Avoid prophylactic use of systemic corticosteroids as premedication before CAR-T cell therapy. Corticosteroids may, however, be required for treatment of cytokine release syndrome or neurologic toxicity.

• budesonide

  Monitor Closely (1)budesonide will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• bumetanide

  Minor (1)hydrocortisone, bumetanide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• buprenorphine

  Serious - Use Alternative (1)buprenorphine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine buccal

  Serious - Use Alternative (1)buprenorphine buccal and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine subdermal implant

  Serious - Use Alternative (1)buprenorphine subdermal implant and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine transdermal

  Serious - Use Alternative (1)buprenorphine transdermal and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine, long-acting injection

  Serious - Use Alternative (1)buprenorphine, long-acting injection and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• buspirone

  Monitor Closely (1)hydrocortisone will decrease the level or effect of buspirone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• butabarbital

  Monitor Closely (1)butabarbital will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• butalbital

  Monitor Closely (1)butalbital will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• caffeine

  Monitor Closely (1)ciprofloxacin will increase the level or effect of caffeine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. The hepatic metabolism of caffeine may be decreased by ciprofloxacin; pharmacologic effects of caffeine may be increased.

• calcium acetate

  Monitor Closely (1)calcium acetate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.Minor (1)hydrocortisone decreases levels of calcium acetate by increasing elimination. Minor/Significance Unknown.

• calcium carbonate

  Monitor Closely (1)calcium carbonate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.Minor (1)hydrocortisone decreases levels of calcium carbonate by increasing elimination. Minor/Significance Unknown.

• calcium chloride

  Monitor Closely (1)calcium chloride decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.Minor (1)hydrocortisone decreases levels of calcium chloride by increasing elimination. Minor/Significance Unknown.

• calcium citrate

  Monitor Closely (1)calcium citrate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.Minor (1)hydrocortisone decreases levels of calcium citrate by increasing elimination. Minor/Significance Unknown.

• calcium gluconate

  Monitor Closely (1)calcium gluconate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Ciprofloxacin should be administered 2 hr before or 6 hr after calcium salts.Minor (1)hydrocortisone decreases levels of calcium gluconate by increasing elimination. Minor/Significance Unknown.

• captopril

  Monitor Closely (1)captopril increases toxicity of ciprofloxacin by Mechanism: unspecified interaction mechanism. Use Caution/Monitor. ACE Inhibitors increase arrhythmogenic potential of ciprofloxacin. Monitor ECG and QT interval.

• carbamazepine

  Monitor Closely (2)ciprofloxacin will increase the level or effect of carbamazepine by decreasing metabolism. Modify Therapy/Monitor Closely. Monitor plasma levels when used concomitantly
  
  hydrocortisone will decrease the level or effect of carbamazepine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.Serious - Use Alternative (1)carbamazepine will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• carbonyl iron

  Serious - Use Alternative (1)carbonyl iron decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug.

• carvedilol

  Minor (1)ciprofloxacin increases levels of carvedilol by decreasing metabolism. Minor/Significance Unknown. May also rarely decrease beta blocker levels.

• celecoxib

  Monitor Closely (2)ciprofloxacin, celecoxib. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  celecoxib, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• ceritinib

  Serious - Use Alternative (1)ceritinib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• cevimeline

  Minor (1)hydrocortisone will decrease the level or effect of cevimeline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• chlordiazepoxide

  Minor (1)ciprofloxacin increases levels of chlordiazepoxide by decreasing metabolism. Minor/Significance Unknown.

• chloroquine

  Monitor Closely (1)chloroquine and ciprofloxacin both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• chlorothiazide

  Minor (1)hydrocortisone, chlorothiazide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• chlorpromazine

  Monitor Closely (1)ciprofloxacin and chlorpromazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• chlorpropamide

  Monitor Closely (1)ciprofloxacin increases effects of chlorpropamide by pharmacodynamic synergism. Use Caution/Monitor. Careful monitoring of blood glucose is recommended when quinolones and antidiabetic agents are coadministered. Hyperglycemia and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agent.Minor (1)hydrocortisone decreases effects of chlorpropamide by pharmacodynamic antagonism. Minor/Significance Unknown.

• chlorthalidone

  Minor (1)hydrocortisone, chlorthalidone. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• cholera vaccine

  Monitor Closely (1)hydrocortisone decreases effects of cholera vaccine by immunosuppressive effects; risk of infection. Modify Therapy/Monitor Closely. Immunosuppressive therapies, including irradiation, antimetabolites, alkylating agents, cytotoxic drugs and corticosteroids (used in greater than physiologic doses), may reduce the immune response to cholera vaccine.Serious - Use Alternative (1)ciprofloxacin, cholera vaccine. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Avoid coadministration of cholera vaccine with systemic antibiotics since these agents may be active against the vaccine strain. Do not administer cholera vaccine to patients who have received oral or parenteral antibiotics within 14 days prior to vaccination.

• cholestyramine

  Monitor Closely (1)cholestyramine decreases levels of hydrocortisone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.

• choline magnesium trisalicylate

  Monitor Closely (1)choline magnesium trisalicylate, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.Minor (1)hydrocortisone decreases levels of choline magnesium trisalicylate by increasing renal clearance. Minor/Significance Unknown.

• chromium

  Minor (1)hydrocortisone decreases levels of chromium by increasing renal clearance. Minor/Significance Unknown.

• cilostazol

  Monitor Closely (1)hydrocortisone will decrease the level or effect of cilostazol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• ciltacabtagene autoleucel

  Serious - Use Alternative (1)hydrocortisone, ciltacabtagene autoleucel. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug. Avoid prophylactic use of systemic corticosteroids as premedication before CAR-T cell therapy. Corticosteroids may, however, be required for treatment of cytokine release syndrome or neurologic toxicity.

• cimetidine

  Serious - Use Alternative (1)cimetidine will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• cinacalcet

  Monitor Closely (1)hydrocortisone will decrease the level or effect of cinacalcet by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• ciprofloxacin

  Monitor Closely (1)hydrocortisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• cisapride

  Serious - Use Alternative (1)hydrocortisone will decrease the level or effect of cisapride by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• cisatracurium

  Monitor Closely (1)cisatracurium, hydrocortisone. Other (see comment). Use Caution/Monitor. Comment: Coadministration of corticosteroids and neuromuscular blockers may increase risk of developing acute myopathy.

• citalopram

  Monitor Closely (1)ciprofloxacin and citalopram both increase QTc interval. Use Caution/Monitor. ECG monitoring is recommended, along with drugs that may prolong the QT interval.

• clarithromycin

  Monitor Closely (1)clarithromycin will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Serious - Use Alternative (2)clarithromycin will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
  
  clarithromycin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.Minor (1)hydrocortisone will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• clomethiazole

  Minor (1)hydrocortisone will decrease the level or effect of clomethiazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• clomipramine

  Minor (1)hydrocortisone will decrease the level or effect of clomipramine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of clomipramine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Concurrent use of drugs that can cause QT interval prolongation may result in additive effects and increased risk of ventricular arrhythmias. It is important to monitor therapy carefully.

• clonazepam

  Minor (1)ciprofloxacin increases levels of clonazepam by decreasing metabolism. Minor/Significance Unknown.

• clopidogrel

  Monitor Closely (1)hydrocortisone will increase the level or effect of clopidogrel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. CYP3A4 inducers may increase the metabolism of clopidogrel to its active metabolite. Monitor patients for potential increase in antiplatelet effects when CYP3A4 inducers are used in combination with clopidogrel

• clorazepate

  Minor (1)ciprofloxacin increases levels of clorazepate by decreasing metabolism. Minor/Significance Unknown.

• clotrimazole

  Monitor Closely (1)clotrimazole will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• clozapine

  Monitor Closely (1)hydrocortisone will decrease the level or effect of clozapine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.Serious - Use Alternative (2)ciprofloxacin will increase the level or effect of clozapine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Use caution when administering ciprofloxacin in patients receiving drugs that prolong the QT interval. At elevated serum concentrations, clozapine may produce clinically significant prolongation of the QTc interval.
  
  clozapine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• cobimetinib

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of cobimetinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concurrent short term (14 days or less) use of moderate CYP3A inhibitors is unavoidable for patients who are taking cobimetinib 60 mg, reduce the cobimetinib dose to 20 mg. After discontinuation of a moderate CYP3A inhibitor, resume cobimetinib 60 mg. Use an alternative to a moderate CYP3A inhibitor in patients who are taking a reduced dose of cobimetinib (40 or 20 mg daily).

• colchicine

  Monitor Closely (2)hydrocortisone will decrease the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin increases toxicity of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Fatal drug interactions reported when colchicine administered with dual inhibitor of CYP3A4 and P-glycoprotein; toxicities also reported when colchicine administered with inhibitors of CYP3A4; coadminister only if no other option available; contraindicated in renal or hepatic impairment with drugs that inhibit both P-gp and CYP3A4.

• colestipol

  Minor (1)colestipol decreases levels of hydrocortisone by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.

• conivaptan

  Monitor Closely (2)conivaptan will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of conivaptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• conjugated estrogens

  Monitor Closely (2)hydrocortisone will decrease the level or effect of conjugated estrogens by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin will decrease the level or effect of conjugated estrogens by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• conjugated estrogens, vaginal

  Monitor Closely (1)hydrocortisone will decrease the level or effect of conjugated estrogens, vaginal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• corticotropin

  Monitor Closely (1)corticotropin and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• cortisone

  Monitor Closely (2)cortisone will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  cortisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• crizotinib

  Monitor Closely (1)crizotinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor. ECG monitoring is recommended, along with drugs that may prolong the QT interval.

• cyclopenthiazide

  Minor (1)hydrocortisone, cyclopenthiazide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• cyclosporine

  Monitor Closely (4)cyclosporine will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  cyclosporine will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  hydrocortisone, cyclosporine. decreasing metabolism. Use Caution/Monitor. Corticosteroids may increase or decrease cyclosporine concentrations. Also, cyclosporine may increase the plasma concentrations of the corticosteroids. Monitor for changes in cyclosporine concentrations and for toxicities of corticosteroids and/or cyclosporine.
  
  hydrocortisone, cyclosporine. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may increase or decrease cyclosporine concentrations. Also, cyclosporine may increase the plasma concentrations of the corticosteroids. Monitor for changes in cyclosporine concentrations and for toxicities of corticosteroids and/or cyclosporine.Minor (1)hydrocortisone, cyclosporine. Either increases levels of the other by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• dalteparin

  Monitor Closely (1)hydrocortisone, dalteparin. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• danazol

  Minor (1)danazol, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• dapsone

  Minor (1)hydrocortisone will decrease the level or effect of dapsone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• darifenacin

  Monitor Closely (1)darifenacin will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• darunavir

  Monitor Closely (2)darunavir will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of darunavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• dasatinib

  Monitor Closely (3)dasatinib will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of dasatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  dasatinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• deferasirox

  Monitor Closely (1)deferasirox will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• degarelix

  Monitor Closely (1)ciprofloxacin and degarelix both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• delavirdine

  Minor (1)hydrocortisone will decrease the level or effect of delavirdine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• dengue vaccine

  Monitor Closely (1)hydrocortisone decreases effects of dengue vaccine by immunosuppressive effects; risk of infection. Use Caution/Monitor. Immunosuppressive therapies (eg, irradiation, antimetabolites, alkylating agents, cytotoxic drugs, corticosteroids [greater than physiologic doses]) may reduce immune response to dengue vaccine.

• denosumab

  Monitor Closely (1)hydrocortisone, denosumab. Other (see comment). Use Caution/Monitor. Comment: Caution should be taken in patients on concomitant immunosuppressants or with impaired immune systems because of increased risk for serious infections.

• desflurane

  Serious - Use Alternative (1)desflurane and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• deutetrabenazine

  Monitor Closely (1)deutetrabenazine and ciprofloxacin both increase QTc interval. Use Caution/Monitor. At the maximum recommended dose, deutetrabenazine does not prolong QT interval to a clinically relevant extent. Certain circumstances may increase risk of torsade de pointes and/or sudden death in association with drugs that prolong the QTc interval (eg, bradycardia, hypokalemia or hypomagnesemia, coadministration with other drugs that prolong QTc interval, presence of congenital QT prolongation).

• dexamethasone

  Monitor Closely (2)dexamethasone will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  dexamethasone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• DHEA, herbal

  Monitor Closely (1)DHEA, herbal will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• diazepam

  Monitor Closely (1)hydrocortisone will decrease the level or effect of diazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.Minor (1)ciprofloxacin increases levels of diazepam by decreasing metabolism. Minor/Significance Unknown.

• dichlorphenamide

  Monitor Closely (2)dichlorphenamide and hydrocortisone both decrease serum potassium. Use Caution/Monitor.
  
  dichlorphenamide and ciprofloxacin both decrease serum potassium. Use Caution/Monitor.

• diclofenac

  Monitor Closely (2)diclofenac, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  diclofenac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• didanosine

  Serious - Use Alternative (1)didanosine decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Oral ciprofloxacin should not be administered simultaneously with didanosine (chewable tablets or powder for oral solution). Administer oral doses of ciprofloxacin 2 hours before or 6 hours after didanosine, chewable tablets or powder for oral solution.

• dienogest/estradiol valerate

  Monitor Closely (2)hydrocortisone will decrease the level or effect of dienogest/estradiol valerate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Advise women to use alternative method of contraception or back-up method when moderate or weak enzyme inducer is used with combination contraceptives. Back-up contraception should be continued for 28 days after discontinuing medication to ensure contraceptive reliability.
  
  ciprofloxacin will decrease the level or effect of dienogest/estradiol valerate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor. An alternate or additional form of birth control may be advisable during concomitant use.

• diflunisal

  Monitor Closely (2)diflunisal, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  diflunisal, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.Minor (1)hydrocortisone decreases levels of diflunisal by increasing renal clearance. Minor/Significance Unknown.

• digoxin

  Minor (1)ciprofloxacin will increase the level or effect of digoxin by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• dihydroergotamine

  Serious - Use Alternative (1)hydrocortisone will decrease the level or effect of dihydroergotamine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• dihydroergotamine intranasal

  Serious - Use Alternative (1)hydrocortisone will decrease the level or effect of dihydroergotamine intranasal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• diltiazem

  Monitor Closely (1)diltiazem will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• diphtheria & tetanus toxoids

  Serious - Use Alternative (1)hydrocortisone decreases effects of diphtheria & tetanus toxoids by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• diphtheria & tetanus toxoids/ acellular pertussis vaccine

  Serious - Use Alternative (1)hydrocortisone decreases effects of diphtheria & tetanus toxoids/ acellular pertussis vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• diphtheria & tetanus toxoids/acellular pertussis/poliovirus, inactivated vaccine

  Serious - Use Alternative (1)hydrocortisone decreases effects of diphtheria & tetanus toxoids/acellular pertussis/poliovirus, inactivated vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• disopyramide

  Monitor Closely (1)ciprofloxacin and disopyramide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.Minor (1)hydrocortisone will decrease the level or effect of disopyramide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• docetaxel

  Minor (1)hydrocortisone will decrease the level or effect of docetaxel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• dofetilide

  Monitor Closely (1)ciprofloxacin and dofetilide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.Serious - Use Alternative (1)dofetilide increases toxicity of ciprofloxacin by QTc interval. Avoid or Use Alternate Drug.

• dolasetron

  Monitor Closely (1)ciprofloxacin and dolasetron both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• donepezil

  Monitor Closely (1)donepezil and ciprofloxacin both increase QTc interval. Use Caution/Monitor.Minor (1)hydrocortisone will decrease the level or effect of donepezil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• doxepin

  Monitor Closely (1)doxepin and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• doxorubicin

  Minor (1)hydrocortisone will decrease the level or effect of doxorubicin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• doxorubicin liposomal

  Minor (1)hydrocortisone will decrease the level or effect of doxorubicin liposomal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• dronedarone

  Monitor Closely (2)dronedarone will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  dronedarone will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.Serious - Use Alternative (2)ciprofloxacin and dronedarone both increase QTc interval. Avoid or Use Alternate Drug. The use of dronedarone in combination with other medications that can prolong the QT interval is contraindicated.
  
  hydrocortisone will decrease the level or effect of dronedarone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• droperidol

  Monitor Closely (1)ciprofloxacin and droperidol both decrease QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• duloxetine

  Monitor Closely (1)ciprofloxacin will increase the level or effect of duloxetine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Coadministration of CYP1A2 inhibiting quinolones with duloxetine may lead to significant increases in duloxetine levels, AUC, and half-life. Consider therapy modification if duloxetine is necessary.

• dutasteride

  Minor (1)hydrocortisone will decrease the level or effect of dutasteride by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• dyphylline

  Monitor Closely (1)hydrocortisone will decrease the level or effect of dyphylline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• efavirenz

  Monitor Closely (2)efavirenz will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  efavirenz and ciprofloxacin both increase QTc interval. Use Caution/Monitor.Minor (1)hydrocortisone will decrease the level or effect of efavirenz by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• elagolix

  Monitor Closely (2)elagolix will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  elagolix will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• eletriptan

  Monitor Closely (1)hydrocortisone will decrease the level or effect of eletriptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• eliglustat

  Monitor Closely (2)eliglustat increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Monitor therapeutic drug concentrations, as indicated, or consider reducing the dosage of the P-gp substrate and titrate to clinical effect.
  
  eliglustat increases levels of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Monitor therapeutic drug concentrations, as indicated, or consider reducing the dosage of the P-gp substrate and titrate to clinical effect.Serious - Use Alternative (1)eliglustat and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• eltrombopag

  Monitor Closely (1)ciprofloxacin will increase the level or effect of eltrombopag by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• eluxadoline

  Monitor Closely (1)ciprofloxacin increases levels of eluxadoline by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. As a precautionary measure due to incomplete information on the metabolism of eluxadoline, use caution when coadministered with strong CYP1A2 inhibitors.

• encorafenib

  Serious - Use Alternative (1)encorafenib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• enoxaparin

  Monitor Closely (1)hydrocortisone, enoxaparin. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• entrectinib

  Serious - Use Alternative (1)ciprofloxacin and entrectinib both increase QTc interval. Avoid or Use Alternate Drug.

• eplerenone

  Minor (1)hydrocortisone will decrease the level or effect of eplerenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• erdafitinib

  Serious - Use Alternative (1)erdafitinib will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If coadministration unavoidable, separate administration by at least 6 hr before or after administration of P-gp substrates with narrow therapeutic index.

• ergotamine

  Serious - Use Alternative (1)hydrocortisone will decrease the level or effect of ergotamine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• eribulin

  Serious - Use Alternative (1)eribulin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• erlotinib

  Monitor Closely (2)hydrocortisone will decrease the level or effect of erlotinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin increases levels of erlotinib by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. If severe adverse effects occur consider reducing erlotinib dose.

• erythromycin base

  Monitor Closely (2)erythromycin base will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  ciprofloxacin and erythromycin base both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.Serious - Use Alternative (2)hydrocortisone will decrease the level or effect of erythromycin base by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
  
  erythromycin base will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• erythromycin ethylsuccinate

  Monitor Closely (2)erythromycin ethylsuccinate will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  ciprofloxacin and erythromycin ethylsuccinate both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.Serious - Use Alternative (2)hydrocortisone will decrease the level or effect of erythromycin ethylsuccinate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
  
  erythromycin ethylsuccinate will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• erythromycin lactobionate

  Monitor Closely (2)ciprofloxacin and erythromycin lactobionate both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.
  
  erythromycin lactobionate will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Serious - Use Alternative (2)hydrocortisone will decrease the level or effect of erythromycin lactobionate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
  
  erythromycin lactobionate will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• erythromycin stearate

  Monitor Closely (2)ciprofloxacin and erythromycin stearate both increase QTc interval. Use Caution/Monitor. Coadministration of ciprofloxacin with drugs known to prolong QT interval could increase risk of developing torsade de pointes in predisposed patients; however less likely with ciprofloxacin than other quinolones.
  
  erythromycin stearate will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Serious - Use Alternative (2)hydrocortisone will decrease the level or effect of erythromycin stearate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
  
  erythromycin stearate will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• escitalopram

  Monitor Closely (1)escitalopram increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor.

• eslicarbazepine acetate

  Minor (1)eslicarbazepine acetate will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• esmolol

  Minor (1)ciprofloxacin increases levels of esmolol by decreasing metabolism. Minor/Significance Unknown.

• estazolam

  Minor (1)ciprofloxacin increases levels of estazolam by decreasing metabolism. Minor/Significance Unknown.

• estradiol

  Monitor Closely (2)ciprofloxacin will decrease the level or effect of estradiol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of estradiol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• estrogens conjugated synthetic

  Monitor Closely (2)hydrocortisone will decrease the level or effect of estrogens conjugated synthetic by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin will decrease the level or effect of estrogens conjugated synthetic by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• estrogens esterified

  Monitor Closely (1)hydrocortisone will decrease the level or effect of estrogens esterified by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• estropipate

  Monitor Closely (2)hydrocortisone will decrease the level or effect of estropipate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin will decrease the level or effect of estropipate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• ethacrynic acid

  Minor (1)hydrocortisone, ethacrynic acid. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• ethinylestradiol

  Monitor Closely (1)ciprofloxacin will decrease the level or effect of ethinylestradiol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

• etodolac

  Monitor Closely (2)etodolac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  etodolac, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• etonogestrel

  Monitor Closely (1)hydrocortisone will decrease the level or effect of etonogestrel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• etoposide

  Minor (1)hydrocortisone will decrease the level or effect of etoposide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• etoricoxib

  Minor (1)hydrocortisone will decrease the level or effect of etoricoxib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• etrasimod

  Monitor Closely (1)etrasimod, ciprofloxacin. Either increases effects of the other by QTc interval. Modify Therapy/Monitor Closely. Transient decrease in heart rate and AV conduction delays may occur when initiating etrasimod. Owing to potential of additive effect on heart rate, etrasimod may increase risk of QT prolongation and Torsades de Pointes when coadministered with Class Ia or Class III antiarrhythmic drugs, or other drugs that prolong the QT interval. .

• etravirine

  Monitor Closely (2)hydrocortisone will decrease the level or effect of etravirine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  etravirine will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• eucalyptus

  Minor (1)hydrocortisone will decrease the level or effect of eucalyptus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• everolimus

  Serious - Use Alternative (1)hydrocortisone will decrease the level or effect of everolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• exemestane

  Minor (1)hydrocortisone will decrease the level or effect of exemestane by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• exenatide injectable solution

  Monitor Closely (1)hydrocortisone decreases effects of exenatide injectable solution by pharmacodynamic antagonism. Use Caution/Monitor. Corticosteroids may diminish hypoglycemic effect of antidiabetic agents. Monitor blood glucose levels carefully. .

• exenatide injectable suspension

  Monitor Closely (1)hydrocortisone decreases effects of exenatide injectable suspension by pharmacodynamic antagonism. Use Caution/Monitor. Corticosteroids may diminish hypoglycemic effect of antidiabetic agents. Monitor blood glucose levels carefully.

• ezogabine

  Monitor Closely (1)ezogabine, ciprofloxacin. Either increases toxicity of the other by QTc interval. Use Caution/Monitor. Slight and transient QT-prolongation observed with ezogabine, particularly when dose titrated to 1200 mg/day. QT interval should be monitored when ezogabine is prescribed with agents known to increase QT interval.

• felodipine

  Monitor Closely (2)hydrocortisone will decrease the level or effect of felodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  felodipine will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• fennel

  Minor (1)fennel decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown. Fennel may decrease the amount of ciprofloxacin the body absorbs. Take fennel at least 1 hour after ciprofloxacin administration.

• fenoprofen

  Monitor Closely (2)fenoprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  fenoprofen, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• ferric citrate

  Monitor Closely (1)ferric citrate will decrease the level or effect of ciprofloxacin by drug binding in GI tract. Use Caution/Monitor. Take at least 2 hours before or after ferric citrate

• ferric maltol

  Monitor Closely (1)ferric maltol decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• ferrous fumarate

  Monitor Closely (1)ferrous fumarate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• ferrous gluconate

  Monitor Closely (1)ferrous gluconate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• ferrous sulfate

  Monitor Closely (1)ferrous sulfate decreases effects of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• fesoterodine

  Monitor Closely (1)hydrocortisone will decrease the level or effect of fesoterodine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• feverfew

  Minor (1)hydrocortisone decreases effects of feverfew by pharmacodynamic antagonism. Minor/Significance Unknown.

• fexinidazole

  Serious - Use Alternative (1)fexinidazole and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Avoid coadministration of fexinidazole with drugs known to block potassium channels and/or prolong QT interval.

• fezolinetant

  Contraindicated (1)ciprofloxacin will increase the level or effect of fezolinetant by affecting hepatic enzyme CYP1A2 metabolism. Contraindicated. Fezolinetant AUC and peak plasma concentration are increased if coadministered with drugs that are weak, moderate, or strong CYP1A2 inhibitors

• finasteride

  Minor (1)hydrocortisone will decrease the level or effect of finasteride by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• finerenone

  Monitor Closely (1)ciprofloxacin will increase the level or effect of finerenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Monitor serum potassium during initiation and dosage adjustment of either finererone or weak CYP3A4 inhibitors. Adjust finererone dosage as needed.

• fingolimod

  Monitor Closely (2)fingolimod and ciprofloxacin both increase QTc interval. Use Caution/Monitor.
  
  hydrocortisone increases effects of fingolimod by immunosuppressive effects; risk of infection. Modify Therapy/Monitor Closely. Concomitant therapy is expected to increase the risk of immunosuppression. Use caution when switching patients from long-acting therapies with immune effects. .

• flecainide

  Monitor Closely (1)ciprofloxacin and flecainide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• flibanserin

  Contraindicated (1)ciprofloxacin will increase the level or effect of flibanserin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Coadministration of flibanserin with moderate or strong CYP3A4 inhibitors is contraindicated. Severe hypotension or syncope can occur.

• fluconazole

  Monitor Closely (1)fluconazole will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• fludrocortisone

  Monitor Closely (2)fludrocortisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.
  
  fludrocortisone will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• fluoxetine

  Monitor Closely (1)ciprofloxacin and fluoxetine both increase QTc interval. Modify Therapy/Monitor Closely.

• fluoxymesterone

  Minor (1)fluoxymesterone, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• flurazepam

  Minor (1)ciprofloxacin increases levels of flurazepam by decreasing metabolism. Minor/Significance Unknown.

• flurbiprofen

  Monitor Closely (2)flurbiprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  flurbiprofen, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• fondaparinux

  Monitor Closely (1)hydrocortisone, fondaparinux. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• fosamprenavir

  Monitor Closely (2)fosamprenavir will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of fosamprenavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• fosaprepitant

  Monitor Closely (2)fosaprepitant will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of fosaprepitant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• foscarnet

  Minor (1)ciprofloxacin, foscarnet. Mechanism: unknown. Minor/Significance Unknown. Based on 2 case reports it was reported that there is a potential for an increased risk of seizures.

• fosphenytoin

  Monitor Closely (2)fosphenytoin will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  fosphenytoin will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• fostamatinib

  Monitor Closely (2)fostamatinib will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Concomitant use of fostamatinib may increase concentrations of P-gp substrates. Monitor for toxicities of the P-gp substrate drug that may require dosage reduction when given concurrently with fostamatinib.
  
  fostamatinib will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Concomitant use of fostamatinib may increase concentrations of P-gp substrates. Monitor for toxicities of the P-gp substrate drug that may require dosage reduction when given concurrently with fostamatinib.

• fostemsavir

  Monitor Closely (1)ciprofloxacin and fostemsavir both increase QTc interval. Use Caution/Monitor. QTc prolongation reported with higher than recommended doses of fostemsavir.

• frovatriptan

  Minor (1)ciprofloxacin will increase the level or effect of frovatriptan by affecting hepatic enzyme CYP1A2 metabolism. Minor/Significance Unknown.

• furosemide

  Minor (1)hydrocortisone, furosemide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• galantamine

  Minor (1)hydrocortisone will decrease the level or effect of galantamine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• gemifloxacin

  Monitor Closely (1)hydrocortisone and gemifloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• gemtuzumab

  Monitor Closely (1)ciprofloxacin and gemtuzumab both increase QTc interval. Use Caution/Monitor.

• gepirone

  Monitor Closely (1)gepirone and ciprofloxacin both increase QTc interval. Modify Therapy/Monitor Closely.

• gilteritinib

  Monitor Closely (1)gilteritinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• glasdegib

  Serious - Use Alternative (1)ciprofloxacin and glasdegib both increase QTc interval. Avoid or Use Alternate Drug. If coadministration unavoidable, monitor for increased risk of QTc interval prolongation.

• glecaprevir/pibrentasvir

  Monitor Closely (2)glecaprevir/pibrentasvir will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  glecaprevir/pibrentasvir will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• glimepiride

  Monitor Closely (1)ciprofloxacin increases effects of glimepiride by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (1)hydrocortisone decreases effects of glimepiride by pharmacodynamic antagonism. Minor/Significance Unknown.

• glipizide

  Monitor Closely (1)ciprofloxacin increases effects of glipizide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (1)hydrocortisone decreases effects of glipizide by pharmacodynamic antagonism. Minor/Significance Unknown.

• gliquidone

  Minor (1)hydrocortisone decreases effects of gliquidone by pharmacodynamic antagonism. Minor/Significance Unknown.

• glyburide

  Monitor Closely (1)ciprofloxacin increases effects of glyburide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (1)hydrocortisone decreases effects of glyburide by pharmacodynamic antagonism. Minor/Significance Unknown.

• glycerol phenylbutyrate

  Monitor Closely (1)hydrocortisone decreases effects of glycerol phenylbutyrate by Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may cause the breakdown of body protein and increase plasma ammonia levels; monitor ammonia levels closely when glycerol phenylbutyrate is coadministered with corticosteroids.

• goserelin

  Monitor Closely (1)goserelin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• granisetron

  Monitor Closely (1)granisetron and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• grapefruit

  Monitor Closely (1)grapefruit will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• green tea

  Minor (1)ciprofloxacin increases levels of green tea by decreasing elimination. Minor/Significance Unknown. (Caffeine). Some quinolones can inhibit the hepatic clearance of caffeine. Caution is advised.

• griseofulvin

  Monitor Closely (1)griseofulvin will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• guanfacine

  Monitor Closely (1)hydrocortisone will decrease the level or effect of guanfacine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• haemophilus influenzae type b vaccine

  Monitor Closely (1)hydrocortisone decreases effects of haemophilus influenzae type b vaccine by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. Avoid vaccination during chemotherapy or radiation therapy if possible because antibody response might be suboptimal. Patients vaccinated within a 14-day period before starting or during immunosuppressive therapy should be revaccinated =3 months after therapy is discontinued if immune competence has been restored.

• haloperidol

  Monitor Closely (1)ciprofloxacin and haloperidol both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• hemin

  Monitor Closely (1)hydrocortisone decreases effects of hemin by pharmacodynamic synergism. Use Caution/Monitor. Drugs that increase delta-aminolevulinic acid synthetase may decrease hemin effect.

• heparin

  Monitor Closely (1)hydrocortisone, heparin. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• hepatitis A vaccine inactivated

  Serious - Use Alternative (1)hydrocortisone decreases effects of hepatitis A vaccine inactivated by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• hepatitis a/b vaccine

  Serious - Use Alternative (1)hydrocortisone decreases effects of hepatitis a/b vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• hepatitis a/typhoid vaccine

  Serious - Use Alternative (1)hydrocortisone decreases effects of hepatitis a/typhoid vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• hepatitis b vaccine

  Serious - Use Alternative (1)hydrocortisone decreases effects of hepatitis b vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• histrelin

  Monitor Closely (1)histrelin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• human papillomavirus vaccine, bivalent

  Serious - Use Alternative (1)hydrocortisone decreases effects of human papillomavirus vaccine, bivalent by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Immunosuppressive therapies, including irradiation, antimetabolites, alkylating agents, cytotoxic drugs, and corticosteroids (used in greater than physiologic doses), may reduce the immune responses to vaccines.

• human papillomavirus vaccine, nonavalent

  Serious - Use Alternative (1)hydrocortisone decreases effects of human papillomavirus vaccine, nonavalent by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Immunosuppressive therapies, including irradiation, antimetabolites, alkylating agents, cytotoxic drugs, and corticosteroids (used in greater than physiologic doses), may reduce the immune responses to vaccines.

• human papillomavirus vaccine, quadrivalent

  Serious - Use Alternative (1)hydrocortisone decreases effects of human papillomavirus vaccine, quadrivalent by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Immunosuppressive therapies, including irradiation, antimetabolites, alkylating agents, cytotoxic drugs, and corticosteroids (used in greater than physiologic doses), may reduce the immune responses to vaccines.

• hydrochlorothiazide

  Minor (1)hydrocortisone, hydrochlorothiazide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• hydrocortisone

  Monitor Closely (1)hydrocortisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• hydrocortisone rectal

  Monitor Closely (1)hydrocortisone rectal and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• hydroxychloroquine sulfate

  Serious - Use Alternative (1)hydroxychloroquine sulfate and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• hydroxyprogesterone caproate (DSC)

  Monitor Closely (1)hydrocortisone will decrease the level or effect of hydroxyprogesterone caproate (DSC) by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• hydroxyzine

  Monitor Closely (1)hydroxyzine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• ibrutinib

  Serious - Use Alternative (1)ciprofloxacin increases levels of ibrutinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid concomitant use of ibrutinib and strong CYP3A4 inhibitors. If a strong CYP3A4 inhibitor must be used short-term (eg, anti-infectives for =7 days), interrupt ibrutinib therapy until strong CYP3A4 inhibitor is discontinued.

• ibuprofen

  Monitor Closely (2)ibuprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  ibuprofen, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• ibuprofen IV

  Monitor Closely (2)ibuprofen IV, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  ibuprofen IV, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• ibutilide

  Monitor Closely (1)ciprofloxacin and ibutilide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• idecabtagene vicleucel

  Serious - Use Alternative (1)hydrocortisone, idecabtagene vicleucel. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug. Avoid prophylactic use of systemic corticosteroids as premedication before CAR-T cell therapy. Corticosteroids may, however, be required for treatment of cytokine release syndrome or neurologic toxicity.

• ifosfamide

  Monitor Closely (1)ciprofloxacin will decrease the level or effect of ifosfamide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Use of a CYP3A4 inhibitor may decrease metabolism of ifosfamide, potentially reducing ifosfamide therapeutic effects.

• iloperidone

  Monitor Closely (2)ciprofloxacin and iloperidone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.
  
  hydrocortisone will decrease the level or effect of iloperidone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• imatinib

  Minor (1)hydrocortisone will decrease the level or effect of imatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• imipramine

  Minor (1)hydrocortisone will decrease the level or effect of imipramine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of imipramine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Concurrent use of drugs that can cause QT interval prolongation may result in additive effects and increased risk of ventricular arrhythmias. It is important to monitor therapy carefully.

• indacaterol, inhaled

  Monitor Closely (2)hydrocortisone, indacaterol, inhaled. serum potassium. Use Caution/Monitor. Combination may increase risk of hypokalemia.
  
  indacaterol, inhaled, ciprofloxacin. QTc interval. Use Caution/Monitor. Drugs that are known to prolong the QTc interval may have an increased the risk of ventricular arrhythmias.

• indapamide

  Minor (1)hydrocortisone, indapamide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• indinavir

  Monitor Closely (2)indinavir will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  indinavir will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• indomethacin

  Monitor Closely (2)indomethacin, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  indomethacin, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• influenza A (H5N1) vaccine

  Monitor Closely (1)hydrocortisone decreases effects of influenza A (H5N1) vaccine by pharmacodynamic antagonism. Use Caution/Monitor. Corticosteroids used in greater than physiologic doses may reduce immune response to H5N1 vaccine.

• influenza virus vaccine (H5N1), adjuvanted

  Monitor Closely (1)hydrocortisone decreases effects of influenza virus vaccine (H5N1), adjuvanted by pharmacodynamic antagonism. Use Caution/Monitor. Corticosteroids used in greater than physiologic doses may reduce immune response to H5N1 vaccine.

• influenza virus vaccine quadrivalent

  Serious - Use Alternative (1)hydrocortisone decreases effects of influenza virus vaccine quadrivalent by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• influenza virus vaccine quadrivalent, adjuvanted

  Serious - Use Alternative (1)hydrocortisone decreases effects of influenza virus vaccine quadrivalent, adjuvanted by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Immunosuppressive drugs may reduce the immune response to influenza vaccine.

• influenza virus vaccine quadrivalent, cell-cultured

  Serious - Use Alternative (1)hydrocortisone decreases effects of influenza virus vaccine quadrivalent, cell-cultured by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• influenza virus vaccine quadrivalent, intranasal

  Serious - Use Alternative (1)hydrocortisone decreases effects of influenza virus vaccine quadrivalent, intranasal by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• influenza virus vaccine quadrivalent, recombinant

  Monitor Closely (1)hydrocortisone decreases effects of influenza virus vaccine quadrivalent, recombinant by pharmacodynamic antagonism. Use Caution/Monitor. Immune response to vaccine may be decreased in immunocompromised individuals.

• influenza virus vaccine trivalent

  Serious - Use Alternative (1)hydrocortisone decreases effects of influenza virus vaccine trivalent by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• influenza virus vaccine trivalent, adjuvanted

  Serious - Use Alternative (1)hydrocortisone decreases effects of influenza virus vaccine trivalent, adjuvanted by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Immunosuppressive drugs may reduce the immune response to influenza vaccine.

• influenza virus vaccine trivalent, recombinant

  Monitor Closely (1)hydrocortisone decreases effects of influenza virus vaccine trivalent, recombinant by pharmacodynamic antagonism. Use Caution/Monitor. Immune response to vaccine may be decreased in immunocompromised individuals.

• inotuzumab

  Serious - Use Alternative (1)inotuzumab and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. If unable to avoid concomitant use, obtain ECGs and electrolytes before and after initiation of any drug known to prolong QTc, and periodically monitor as clinically indicated during treatment.

• insulin aspart

  Monitor Closely (1)ciprofloxacin increases effects of insulin aspart by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (1)hydrocortisone decreases effects of insulin aspart by pharmacodynamic antagonism. Minor/Significance Unknown.

• insulin degludec

  Monitor Closely (1)hydrocortisone decreases effects of insulin degludec by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. Endogneous cortisol is a regulatory hormone that increases blood glucose levels; exogenous systemic corticosteroids have been associated with hyperglycemia and may cause diabetes with chronic, high dose use; dose of antidiabetic agents may need adjustment and increased frequency of glucose monitoring may be required.

• insulin degludec/insulin aspart

  Monitor Closely (1)hydrocortisone decreases effects of insulin degludec/insulin aspart by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. Endogneous cortisol is a regulatory hormone that increases blood glucose levels; exogenous systemic corticosteroids have been associated with hyperglycemia and may cause diabetes with chronic, high dose use; dose of antidiabetic agents may need adjustment and increased frequency of glucose monitoring may be required.

• insulin detemir

  Minor (1)hydrocortisone decreases effects of insulin detemir by pharmacodynamic antagonism. Minor/Significance Unknown.

• insulin glargine

  Minor (1)hydrocortisone decreases effects of insulin glargine by pharmacodynamic antagonism. Minor/Significance Unknown.

• insulin glulisine

  Minor (1)hydrocortisone decreases effects of insulin glulisine by pharmacodynamic antagonism. Minor/Significance Unknown.

• insulin inhaled

  Monitor Closely (1)hydrocortisone decreases effects of insulin inhaled by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. Endogneous cortisol is a regulatory hormone that increases blood glucose levels; exogenous systemic corticosteroids have been associated with hyperglycemia and may cause diabetes with chronic, high dose use; dose of antidiabetic agents may need adjustment and increased frequency of glucose monitoring may be required.

• insulin lispro

  Monitor Closely (1)ciprofloxacin increases effects of insulin lispro by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (1)hydrocortisone decreases effects of insulin lispro by pharmacodynamic antagonism. Minor/Significance Unknown.

• insulin NPH

  Minor (1)hydrocortisone decreases effects of insulin NPH by pharmacodynamic antagonism. Minor/Significance Unknown.

• insulin regular human

  Monitor Closely (1)ciprofloxacin increases effects of insulin regular human by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (1)hydrocortisone decreases effects of insulin regular human by pharmacodynamic antagonism. Minor/Significance Unknown.

• iron dextran complex

  Monitor Closely (1)iron dextran complex decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• iron sucrose

  Serious - Use Alternative (1)iron sucrose decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• isavuconazonium sulfate

  Monitor Closely (3)hydrocortisone and isavuconazonium sulfate both decrease immunosuppressive effects; risk of infection. Use Caution/Monitor.
  
  ciprofloxacin will increase the level or effect of isavuconazonium sulfate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of isavuconazonium sulfate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• isoflurane

  Serious - Use Alternative (1)isoflurane and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• isoniazid

  Monitor Closely (1)isoniazid will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.Minor (1)hydrocortisone decreases effects of isoniazid by unknown mechanism. Minor/Significance Unknown.

• isotretinoin

  Minor (1)ciprofloxacin, isotretinoin. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Both drugs have increased risk of phototoxicity, use caution with concomitant use.

• isradipine

  Minor (1)hydrocortisone will decrease the level or effect of isradipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• istradefylline

  Monitor Closely (2)istradefylline will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Istradefylline 40 mg/day increased peak levels and AUC of P-gp substrates in clinical trials. Consider dose reduction of sensitive P-gp substrates.
  
  istradefylline will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Istradefylline 40 mg/day increased peak levels and AUC of P-gp substrates in clinical trials. Consider dose reduction of sensitive P-gp substrates.

• itraconazole

  Monitor Closely (1)itraconazole and ciprofloxacin both increase QTc interval. Use Caution/Monitor.Minor (1)hydrocortisone will decrease the level or effect of itraconazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• ivacaftor

  Monitor Closely (3)ivacaftor increases levels of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Ivacaftor and its M1 metabolite has the potential to inhibit P-gp; may significantly increase systemic exposure to sensitive P-gp substrates with a narrow therapeutic index.
  
  ivacaftor increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Ivacaftor and its M1 metabolite has the potential to inhibit P-gp; may significantly increase systemic exposure to sensitive P-gp substrates with a narrow therapeutic index.
  
  ciprofloxacin increases levels of ivacaftor by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Monitor when coadministered with weak CYP3A4 inhibitors .

• ivosidenib

  Monitor Closely (1)ciprofloxacin will increase the level or effect of ivosidenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration with moderate CYP3A4 inhibitors may increase ivosidenib plasma concentrations, thus increasing the risk of QTc prolongation. Monitor for increased risk of QTc interval prolongation.Serious - Use Alternative (1)ivosidenib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Avoid coadministration of QTc prolonging drugs with ivosidenib or replace with alternate therapies. If coadministration of a QTc prolonging drug is unavoidable, monitor for increased risk of QTc interval prolongation.

• ixabepilone

  Monitor Closely (1)hydrocortisone will decrease the level or effect of ixabepilone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• Japanese encephalitis virus vaccine

  Serious - Use Alternative (1)hydrocortisone decreases effects of Japanese encephalitis virus vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• ketoconazole

  Monitor Closely (2)ketoconazole will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ketoconazole will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Minor (1)hydrocortisone will decrease the level or effect of ketoconazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• ketoprofen

  Monitor Closely (2)ketoprofen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  ketoprofen, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• ketorolac

  Monitor Closely (2)ketorolac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  ketorolac, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• ketorolac intranasal

  Monitor Closely (1)ketorolac intranasal, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• lacidipine

  Monitor Closely (1)hydrocortisone will decrease the level or effect of lacidipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• lanthanum carbonate

  Monitor Closely (1)lanthanum carbonate decreases levels of ciprofloxacin by cation binding in GI tract. Use Caution/Monitor. Administer oral quinolone antibiotics at least 1 hr before or 4 hr after lanthanum. Interaction applies only to oral quinolones.

• lapatinib

  Monitor Closely (3)lapatinib will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of lapatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  lapatinib will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• lasmiditan

  Serious - Use Alternative (2)lasmiditan increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.
  
  lasmiditan increases levels of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

• lefamulin

  Serious - Use Alternative (1)lefamulin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• lemborexant

  Monitor Closely (1)ciprofloxacin will increase the level or effect of lemborexant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Lower nightly dose of lemborexant recommended if coadministered with weak CYP3A4 inhibitors. See drug monograph for specific dosage modification.

• lenacapavir

  Monitor Closely (1)lenacapavir will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Lenacapavir (a CYP3A4 inhibitor) may significantly increase levels of hydrocortisone, resulting in an increase risk of toxicities (eg, Cushing syndrome, adrenal suppression). Initiate dexamethasone as the lowest starting dose, monitor, and titrate accordingly.

• lenvatinib

  Monitor Closely (1)ciprofloxacin and lenvatinib both increase QTc interval. Use Caution/Monitor. Lenvatinib prescribing information recommends monitoring ECG closely when coadministered with QT prolonging drugs.

• lepirudin

  Monitor Closely (1)hydrocortisone, lepirudin. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• lercanidipine

  Monitor Closely (1)hydrocortisone will decrease the level or effect of lercanidipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• letermovir

  Monitor Closely (1)letermovir increases levels of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• leuprolide

  Monitor Closely (1)leuprolide increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• levobupivacaine

  Monitor Closely (1)hydrocortisone will decrease the level or effect of levobupivacaine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• levofloxacin

  Monitor Closely (1)hydrocortisone and levofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• levoketoconazole

  Monitor Closely (2)levoketoconazole will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  levoketoconazole will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Minor (1)hydrocortisone will decrease the level or effect of levoketoconazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• levonorgestrel oral/ethinylestradiol/ferrous bisglycinate

  Monitor Closely (1)ciprofloxacin will decrease the level or effect of levonorgestrel oral/ethinylestradiol/ferrous bisglycinate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor. Antibiotics may decrease hormonal contraceptive efficacy.

• lidocaine

  Monitor Closely (1)ciprofloxacin will increase the level or effect of lidocaine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Lidocaine plasma levels may be elevated, increasing the risk of toxicity. Monitor cardiac function and symptoms of toxicity.

• linagliptin

  Monitor Closely (1)hydrocortisone will increase the level or effect of linagliptin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Use of alternative treatments is strongly recommended when linagliptin is to be administered with a CYP3A4 inducer

• liraglutide

  Monitor Closely (1)hydrocortisone decreases effects of liraglutide by pharmacodynamic antagonism. Use Caution/Monitor. Corticosteroids may diminish hypoglycemic effect of antidiabetic agents. Monitor blood glucose levels carefully. .

• lisocabtagene maraleucel

  Serious - Use Alternative (1)hydrocortisone, lisocabtagene maraleucel. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug. Avoid prophylactic use of systemic corticosteroids as premedication before CAR-T cell therapy. Corticosteroids may, however, be required for treatment of cytokine release syndrome or neurologic toxicity.

• lithium

  Monitor Closely (1)lithium and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• lomitapide

  Monitor Closely (3)ciprofloxacin increases levels of lomitapide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Lomitapide dose should not exceed 30 mg/day.
  
  lomitapide increases levels of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Consider reducing dose when used concomitantly with lomitapide.
  
  lomitapide increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Consider reducing dose when used concomitantly with lomitapide.

• lonafarnib

  Monitor Closely (1)lonafarnib will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Lonafarnib is a weak P-gp inhibitor. Monitor for adverse reactions if coadministered with P-gp substrates where minimal concentration changes may lead to serious or life-threatening toxicities. Reduce P-gp substrate dose if needed.Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of lonafarnib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration of lonafarnib (a sensitive CYP3A substrate) with weak CYP3A inhibitors is unavoidable, reduce to, or continue lonafarnib at starting dose. Closely monitor for arrhythmias and events (eg, syncope, heart palpitations) since lonafarnib effect on QT interval is unknown.

• lonapegsomatropin

  Monitor Closely (3)lonapegsomatropin decreases effects of hydrocortisone by Other (see comment). Use Caution/Monitor. Comment: Growth hormone (GH) inhibits microsomal enzyme 11 beta-hydroxysteroid dehydrogenase type 1, which converts cortisone to its active metabolite, cortisol. Patients with untreated GH deficiency may have increases in serum cortisol, and initiation of lonapegsomatropin may result decreased serum cortisol. Patients with hypoadrenalism treated with glucocorticoids may require an increase glucocorticoid stress or maintenance doses following lonapegsomatropin initiation.
  
  hydrocortisone decreases effects of lonapegsomatropin by Other (see comment). Use Caution/Monitor. Comment: Glucocorticoid therapy and supraphysiologic glucocorticoid treatment may attenuate the growth promoting effects of lonapegsomatropin in children. Carefully adjust glucocorticoid replacement dosing in children receiving glucocorticoid treatments to avoid both hypoadrenalism and an inhibitory effect on growth.
  
  hydrocortisone decreases effects of lonapegsomatropin by pharmacodynamic antagonism. Use Caution/Monitor. Supraphysiologic glucocorticoid treatment may attenuate growth-promoting effects of growth hormone (GH). Microsomal enzyme 11-beta-hydroxysteroid dehydrogenase type 1 (11-beta-HSD-1) is required for conversion of cortisone to its active metabolite, cortisol, in hepatic and adipose tissue. GH inhibits 11-beta-HSD-1. Consequently, individuals with untreated GH deficiency have relative increases in 11-beta-HSD-1 and serum cortisol. Initiation of GH analogs may result in inhibition of 11-beta-HSD-1 and reduced serum cortisol concentrations.

• lopinavir

  Monitor Closely (1)hydrocortisone will decrease the level or effect of lopinavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• loratadine

  Monitor Closely (2)hydrocortisone will decrease the level or effect of loratadine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  loratadine will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• lornoxicam

  Monitor Closely (1)lornoxicam, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• lovastatin

  Monitor Closely (1)lovastatin will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Serious - Use Alternative (1)hydrocortisone will decrease the level or effect of lovastatin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• lumefantrine

  Monitor Closely (3)ciprofloxacin and lumefantrine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.
  
  hydrocortisone will decrease the level or effect of lumefantrine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  lumefantrine will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• macimorelin

  Serious - Use Alternative (2)hydrocortisone, macimorelin. unspecified interaction mechanism. Avoid or Use Alternate Drug. Drugs that directly affect the pituitary secretion of growth hormone (GH) may impact the accuracy of the macimorelin diagnostic test. Allow sufficient washout time of drugs affecting GH release before administering macimorelin. .
  
  macimorelin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Macimorelin causes an increase of ~11 msec in the corrected QT interval. Avoid coadministration with drugs that prolong QT interval, which could increase risk for developing torsade de pointes-type ventricular tachycardia. Allow sufficient washout time of drugs that are known to prolong the QT interval before administering macimorelin.

• magnesium chloride

  Monitor Closely (1)magnesium chloride decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium citrate

  Monitor Closely (1)magnesium citrate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium hydroxide

  Monitor Closely (1)magnesium hydroxide decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium oxide

  Monitor Closely (1)magnesium oxide decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Separate by 2 hours.

• magnesium sulfate

  Monitor Closely (1)magnesium sulfate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• magnesium supplement

  Monitor Closely (1)magnesium supplement will decrease the level or effect of ciprofloxacin by Other (see comment). Modify Therapy/Monitor Closely. Formation of an insoluble complex reduces absorption of the drug through intestinal tract; administer magnesium 2hr before the quinolone or 6hr after the quinolone

• maraviroc

  Monitor Closely (1)hydrocortisone will decrease the level or effect of maraviroc by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• marijuana

  Monitor Closely (1)marijuana will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• measles (rubeola) vaccine

  Serious - Use Alternative (1)hydrocortisone decreases effects of measles (rubeola) vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• measles mumps and rubella vaccine, live

  Serious - Use Alternative (1)hydrocortisone decreases effects of measles mumps and rubella vaccine, live by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• measles, mumps, rubella and varicella vaccine, live

  Serious - Use Alternative (1)hydrocortisone decreases effects of measles, mumps, rubella and varicella vaccine, live by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• meclofenamate

  Monitor Closely (2)meclofenamate, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  meclofenamate, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• mefenamic acid

  Monitor Closely (2)mefenamic acid, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  mefenamic acid, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• mefloquine

  Monitor Closely (1)ciprofloxacin and mefloquine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.Serious - Use Alternative (1)mefloquine increases toxicity of ciprofloxacin by QTc interval. Avoid or Use Alternate Drug. Mefloquine may enhance the QTc prolonging effect of high risk QTc prolonging agents.

• melatonin

  Monitor Closely (1)ciprofloxacin will increase the level or effect of melatonin by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Monitor melatonin effects if coadministered with moderate CYP1A2 inhibitors

• meloxicam

  Monitor Closely (2)meloxicam, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  meloxicam, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• meningococcal A C Y and W-135 polysaccharide vaccine combined

  Serious - Use Alternative (1)hydrocortisone decreases effects of meningococcal A C Y and W-135 polysaccharide vaccine combined by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• meningococcal group B vaccine

  Monitor Closely (1)hydrocortisone decreases effects of meningococcal group B vaccine by pharmacodynamic antagonism. Use Caution/Monitor. Individuals with altered immunocompetence may have reduced immune responses to the vaccine.

• mesalamine

  Minor (1)hydrocortisone decreases levels of mesalamine by increasing renal clearance. Minor/Significance Unknown.

• mesterolone

  Minor (1)mesterolone, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• mestranol

  Monitor Closely (2)ciprofloxacin will decrease the level or effect of mestranol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of mestranol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• metformin

  Monitor Closely (1)ciprofloxacin increases effects of metformin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (1)hydrocortisone decreases effects of metformin by pharmacodynamic antagonism. Minor/Significance Unknown.

• methadone

  Monitor Closely (2)hydrocortisone will decrease the level or effect of methadone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin and methadone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• methotrexate

  Monitor Closely (1)ciprofloxacin will increase the level or effect of methotrexate by Other (see comment). Use Caution/Monitor. Renal tubular transport of methotrexate may be inhibited by coadministration of ciprofloxacin, potentially leading to increased methotrexate plasma levels and toxicity.

• methyclothiazide

  Minor (1)hydrocortisone, methyclothiazide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• methyl aminolevulinate

  Serious - Use Alternative (1)ciprofloxacin, methyl aminolevulinate. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Each drug may increase the photosensitizing effect of the other.

• methylprednisolone

  Monitor Closely (2)methylprednisolone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.
  
  hydrocortisone will decrease the level or effect of methylprednisolone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• methyltestosterone

  Minor (1)methyltestosterone, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• metolazone

  Minor (1)hydrocortisone, metolazone. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• metoprolol

  Minor (1)ciprofloxacin increases levels of metoprolol by decreasing metabolism. Minor/Significance Unknown. Ciprofloxacin may increase metoprolol plasma concentrations however mechanism is unknown. Further clinical evidence is needed but it may be appropriate to monitor patients during concomitant therapy with ciprofloxacin.

• metronidazole

  Monitor Closely (1)metronidazole will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• metyrapone

  Minor (1)hydrocortisone decreases effects of metyrapone by unspecified interaction mechanism. Minor/Significance Unknown.

• mexiletine

  Monitor Closely (1)ciprofloxacin will increase the level or effect of mexiletine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Mexiletine concentrations may be elevated and may produce an increase in therapeutic and adverse reactions.

• mibefradil

  Minor (1)hydrocortisone will decrease the level or effect of mibefradil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• miconazole vaginal

  Monitor Closely (1)miconazole vaginal will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• microbiota oral

  Serious - Use Alternative (1)ciprofloxacin decreases effects of microbiota oral by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Microbiota oral contains bacterial spores. Antibacterial agents may decrease efficacy if coadministered. Complete antibiotic regimens 2-4 days before initiating microbiota oral. .

• midazolam

  Monitor Closely (1)hydrocortisone will decrease the level or effect of midazolam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.Minor (1)ciprofloxacin increases levels of midazolam by decreasing metabolism. Minor/Significance Unknown.

• midazolam intranasal

  Monitor Closely (1)ciprofloxacin will increase the level or effect of midazolam intranasal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration of mild CYP3A4 inhibitors with midazolam intranasal may cause higher midazolam systemic exposure, which may prolong sedation.

• mifepristone

  Contraindicated (1)mifepristone, hydrocortisone. Mechanism: unknown. Contraindicated. Mfr. states that mifepristone is contraindicated in pts. on long term corticosteroid Tx.Monitor Closely (1)ciprofloxacin will increase the level or effect of mifepristone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Use alternatives if available.

• miglitol

  Monitor Closely (1)ciprofloxacin increases effects of miglitol by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (1)hydrocortisone decreases effects of miglitol by pharmacodynamic antagonism. Minor/Significance Unknown.

• mirtazapine

  Serious - Use Alternative (1)mirtazapine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• mobocertinib

  Serious - Use Alternative (1)mobocertinib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. If coadministration unavoidable, reduce mobocertinib dose and monitor QTc interval more frequently.

• mometasone inhaled

  Monitor Closely (1)mometasone inhaled and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• montelukast

  Minor (1)hydrocortisone will decrease the level or effect of montelukast by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• moxifloxacin

  Monitor Closely (2)ciprofloxacin and moxifloxacin both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.
  
  hydrocortisone and moxifloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• nabumetone

  Monitor Closely (2)nabumetone, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  nabumetone, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• nadolol

  Minor (1)ciprofloxacin increases levels of nadolol by decreasing metabolism. Minor/Significance Unknown.

• naproxen

  Monitor Closely (2)naproxen, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  naproxen, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• nateglinide

  Monitor Closely (1)ciprofloxacin increases effects of nateglinide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (1)hydrocortisone decreases effects of nateglinide by pharmacodynamic antagonism. Minor/Significance Unknown.

• nebivolol

  Minor (1)ciprofloxacin increases levels of nebivolol by decreasing metabolism. Minor/Significance Unknown.

• nefazodone

  Monitor Closely (1)nefazodone will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Serious - Use Alternative (1)nefazodone will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• nelfinavir

  Monitor Closely (1)nelfinavir will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• nevirapine

  Monitor Closely (1)nevirapine will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• nicardipine

  Monitor Closely (2)hydrocortisone will decrease the level or effect of nicardipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  nicardipine will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• nifedipine

  Monitor Closely (2)nifedipine will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  nifedipine will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Minor (1)hydrocortisone will decrease the level or effect of nifedipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• nilotinib

  Monitor Closely (4)hydrocortisone will decrease the level or effect of nilotinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin and nilotinib both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.
  
  nilotinib will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  nilotinib will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• nimodipine

  Minor (1)hydrocortisone will decrease the level or effect of nimodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• nisoldipine

  Monitor Closely (1)hydrocortisone will decrease the level or effect of nisoldipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• nitrendipine

  Minor (1)hydrocortisone will decrease the level or effect of nitrendipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• norfloxacin

  Monitor Closely (1)hydrocortisone and norfloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• ocrelizumab

  Monitor Closely (1)hydrocortisone and ocrelizumab both increase immunosuppressive effects; risk of infection. Use Caution/Monitor. Coadministration of ocrelizumab with high doses of corticosteroids is expected to increase the risk of immunosuppression.

• ofatumumab SC

  Monitor Closely (1)ofatumumab SC, hydrocortisone. Either increases effects of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Consider the risk of additive immune system effects when coadministering immunosuppressive therapies with coadministration. When switching from therapies with immune effects, take into account the duration and mechanism of action of these therapies when initiating ofatumumab SC.

• ofloxacin

  Monitor Closely (1)hydrocortisone and ofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• olanzapine

  Monitor Closely (1)ciprofloxacin will increase the level or effect of olanzapine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Olanzapine plasma concentrations may be elevated, increasing the risk of adverse reactions such as orthostatic hypotension or sedation. It is important to use caution and observe patient and adjust the olanzapine dosage as needed.Serious - Use Alternative (1)olanzapine and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• olaparib

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of olaparib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration with moderate CYP3A inhibitors cannot be avoided, reduce olaparib dose to 200 mg (capsule) or 150 mg (tablet) PO BID. Do not substitute tablets with capsules.

• olodaterol inhaled

  Monitor Closely (2)hydrocortisone and olodaterol inhaled both decrease serum potassium. Use Caution/Monitor.
  
  ciprofloxacin and olodaterol inhaled both increase QTc interval. Use Caution/Monitor. Drugs that prolong the QTc interval and may potentiate the effects of beta2 agonists on the cardiovascular system; increased risk of ventricular arrhythmias

• omeprazole

  Monitor Closely (1)omeprazole will decrease the level or effect of ciprofloxacin by unknown mechanism. Use Caution/Monitor. Absorption of the ciprofloxacin ER tablet was slightly diminished (20%) when coadministered with omeprazole.

• ondansetron

  Serious - Use Alternative (1)ciprofloxacin and ondansetron both increase QTc interval. Avoid or Use Alternate Drug. Avoid with congenital long QT syndrome; ECG monitoring recommended with concomitant medications that prolong QT interval, electrolyte abnormalities, CHF, or bradyarrhythmias.

• osilodrostat

  Monitor Closely (1)osilodrostat and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• osimertinib

  Monitor Closely (1)osimertinib and ciprofloxacin both increase QTc interval. Use Caution/Monitor. Conduct periodic monitoring with ECGs and electrolytes in patients taking drugs known to prolong the QTc interval.

• oxaliplatin

  Monitor Closely (1)oxaliplatin will increase the level or effect of ciprofloxacin by Other (see comment). Use Caution/Monitor. Monitor for ECG changes if therapy is initiated in patients with drugs known to prolong QT interval.Serious - Use Alternative (1)oxaliplatin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• oxandrolone

  Minor (1)oxandrolone, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• oxaprozin

  Monitor Closely (2)oxaprozin, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  oxaprozin, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• oxcarbazepine

  Monitor Closely (1)oxcarbazepine will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• oxybutynin

  Minor (1)hydrocortisone will decrease the level or effect of oxybutynin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• oxymetholone

  Minor (1)oxymetholone, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• ozanimod

  Monitor Closely (1)ozanimod and ciprofloxacin both increase QTc interval. Modify Therapy/Monitor Closely. The potential additive effects on heart rate, treatment with ozanimod should generally not be initiated in patients who are concurrently treated with QT prolonging drugs with known arrhythmogenic properties.

• paclitaxel

  Minor (1)hydrocortisone will decrease the level or effect of paclitaxel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• paclitaxel protein bound

  Minor (1)hydrocortisone will decrease the level or effect of paclitaxel protein bound by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• pacritinib

  Serious - Use Alternative (2)hydrocortisone will decrease the level or effect of pacritinib by affecting hepatic enzyme CYP2E1 metabolism. Avoid or Use Alternate Drug.
  
  hydrocortisone will decrease the level or effect of pacritinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• paliperidone

  Monitor Closely (1)ciprofloxacin and paliperidone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• pancuronium

  Monitor Closely (1)pancuronium, hydrocortisone. Other (see comment). Use Caution/Monitor. Comment: Coadministration of corticosteroids and neuromuscular blockers may increase risk of developing acute myopathy.

• panobinostat

  Serious - Use Alternative (1)ciprofloxacin and panobinostat both increase QTc interval. Avoid or Use Alternate Drug. Panobinostat is known to significantly prolong QT interval. Panobinostat prescribing information states use with drugs known to prolong QTc is not recommended.

• parecoxib

  Monitor Closely (1)parecoxib, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.Minor (1)hydrocortisone will decrease the level or effect of parecoxib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• pasireotide

  Monitor Closely (1)ciprofloxacin and pasireotide both increase QTc interval. Modify Therapy/Monitor Closely.

• patiromer

  Monitor Closely (1)patiromer will decrease the level or effect of ciprofloxacin by drug binding in GI tract. Modify Therapy/Monitor Closely. Separate administration by at least 3 hr from patiromer

• pazopanib

  Monitor Closely (1)hydrocortisone will decrease the level or effect of pazopanib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• penbutolol

  Minor (1)ciprofloxacin increases levels of penbutolol by decreasing metabolism. Minor/Significance Unknown.

• pentamidine

  Monitor Closely (1)ciprofloxacin and pentamidine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• pentobarbital

  Monitor Closely (1)pentobarbital will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• pentoxifylline

  Monitor Closely (1)ciprofloxacin will increase the level or effect of pentoxifylline by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• phenindione

  Monitor Closely (1)hydrocortisone, phenindione. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• phenobarbital

  Monitor Closely (2)phenobarbital will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  phenobarbital will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• phenytoin

  Monitor Closely (3)phenytoin will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  ciprofloxacin decreases effects of phenytoin by unknown mechanism. Use Caution/Monitor. Ciprofloxacin has been reported to both increase and decrease phenytoin concentrations. Additional clinical evidence is needed however; phenytoin serum concentrations should be monitored in patients.
  
  phenytoin will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• pimozide

  Monitor Closely (1)ciprofloxacin and pimozide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.Minor (1)hydrocortisone will decrease the level or effect of pimozide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• pindolol

  Minor (1)ciprofloxacin increases levels of pindolol by decreasing metabolism. Minor/Significance Unknown.

• pioglitazone

  Monitor Closely (1)ciprofloxacin increases effects of pioglitazone by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (2)hydrocortisone will decrease the level or effect of pioglitazone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
  
  hydrocortisone decreases effects of pioglitazone by pharmacodynamic antagonism. Minor/Significance Unknown.

• pirfenidone

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of pirfenidone by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Use of strong CYP1A2 inhibitors should be discontinued before initiating pirfenidone and avoided during treatment; if strong CYP1A2 inhibitors are the only drug of choice, dosage reductions are recommended

• piroxicam

  Monitor Closely (2)piroxicam, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  piroxicam, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• pitolisant

  Serious - Use Alternative (1)ciprofloxacin and pitolisant both increase QTc interval. Avoid or Use Alternate Drug.

• pneumococcal vaccine 13-valent

  Serious - Use Alternative (1)hydrocortisone decreases effects of pneumococcal vaccine 13-valent by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• pneumococcal vaccine heptavalent

  Serious - Use Alternative (1)hydrocortisone decreases effects of pneumococcal vaccine heptavalent by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• pneumococcal vaccine polyvalent

  Serious - Use Alternative (1)hydrocortisone decreases effects of pneumococcal vaccine polyvalent by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• poliovirus vaccine inactivated

  Monitor Closely (1)hydrocortisone decreases effects of poliovirus vaccine inactivated by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. Avoid vaccination during chemotherapy or radiation therapy if possible because antibody response might be suboptimal. Patients vaccinated within a 14-day period before starting or during immunosuppressive therapy should be revaccinated =3 months after therapy is discontinued if immune competence has been restored. .

• poliovirus vaccine live oral trivalent

  Serious - Use Alternative (1)hydrocortisone decreases effects of poliovirus vaccine live oral trivalent by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• polysaccharide iron

  Monitor Closely (1)polysaccharide iron decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Coadministration of ciprofloxacin with multivalent cation-containing products may reduce the bioavailability of ciprofloxacin by 90%. Administer ciprofloxacin at least 2 hours before or 6 hours after using these products. Use alternatives if available.

• pomalidomide

  Serious - Use Alternative (1)ciprofloxacin increases levels of pomalidomide by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug.

• ponatinib

  Monitor Closely (2)ponatinib increases levels of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  ponatinib increases levels of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• ponesimod

  Monitor Closely (1)ponesimod and hydrocortisone both increase immunosuppressive effects; risk of infection. Use Caution/Monitor. Caution if coadministered because of additive immunosuppressive effects during such therapy and in the weeks following administration. When switching from drugs with prolonged immune effects, consider the half-life and mode of action of these drugs to avoid unintended additive immunosuppressive effects.

• porfimer

  Minor (1)hydrocortisone decreases levels of porfimer by unspecified interaction mechanism. Minor/Significance Unknown.

• posaconazole

  Monitor Closely (1)posaconazole will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• prednisolone

  Monitor Closely (1)prednisolone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.Minor (1)hydrocortisone will decrease the level or effect of prednisolone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• prednisone

  Monitor Closely (2)prednisone and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.
  
  hydrocortisone will decrease the level or effect of prednisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• pretomanid

  Monitor Closely (1)pretomanid will increase the level or effect of ciprofloxacin by Other (see comment). Modify Therapy/Monitor Closely. In vitro studies demonstrated that pretomanid significantly inhibits OAT3; monitor for increased adverse effects and consider dosage reduction for OAT3 substrates.

• primaquine

  Monitor Closely (1)primaquine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• primidone

  Monitor Closely (1)primidone will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• probenecid

  Monitor Closely (1)probenecid will increase the level or effect of ciprofloxacin by Other (see comment). Use Caution/Monitor. Probenecid interferes with renal tubular secretion of ciprofloxacin and produces an increase in the ciprofloxacin levels in the serum

• procainamide

  Monitor Closely (1)ciprofloxacin and procainamide both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• propafenone

  Minor (1)hydrocortisone will decrease the level or effect of propafenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• propranolol

  Minor (1)ciprofloxacin increases levels of propranolol by decreasing metabolism. Minor/Significance Unknown.

• protamine

  Monitor Closely (1)hydrocortisone, protamine. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• pyridoxine

  Minor (1)ciprofloxacin will decrease the level or effect of pyridoxine by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• quazepam

  Minor (1)ciprofloxacin increases levels of quazepam by decreasing metabolism. Minor/Significance Unknown.

• quercetin

  Monitor Closely (1)quercetin will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Minor (1)quercetin decreases effects of ciprofloxacin by pharmacodynamic antagonism. Minor/Significance Unknown.

• quetiapine

  Monitor Closely (2)quetiapine, ciprofloxacin. Either increases toxicity of the other by QTc interval. Use Caution/Monitor. Avoid use with drugs that prolong QT and in patients with risk factors for prolonged QT interval. Postmarketing cases show QT prolongation with overdose in patients with concomitant illness or with drugs known to cause electrolyte imbalance or prolong QT.
  
  hydrocortisone will decrease the level or effect of quetiapine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• quinapril

  Monitor Closely (1)quinapril will decrease the level or effect of ciprofloxacin by Other (see comment). Use Caution/Monitor. Separate doses of quinapril and oral quinolones by 2 hr; interaction likely due to chelation

• quinidine

  Monitor Closely (2)ciprofloxacin and quinidine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.
  
  hydrocortisone will decrease the level or effect of quinidine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.Serious - Use Alternative (1)quinidine will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

• quinine

  Monitor Closely (1)ciprofloxacin and quinine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.Minor (1)hydrocortisone will decrease the level or effect of quinine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• quinupristin/dalfopristin

  Monitor Closely (1)quinupristin/dalfopristin will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• quizartinib

  Monitor Closely (1)quizartinib, ciprofloxacin. Either increases effects of the other by QTc interval. Modify Therapy/Monitor Closely. Monitor patients more frequently with ECG if coadministered with QT prolonging drugs.

• rabeprazole

  Minor (1)hydrocortisone will decrease the level or effect of rabeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• rabies vaccine

  Serious - Use Alternative (1)hydrocortisone decreases effects of rabies vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids may interfere with development of active immunity.

• rabies vaccine chick embryo cell derived

  Serious - Use Alternative (1)hydrocortisone decreases effects of rabies vaccine chick embryo cell derived by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• ramelteon

  Monitor Closely (1)ciprofloxacin will increase the level or effect of ramelteon by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Ciprofloxacin may decrease the metabolism of ramelteon; if ciprofloxacin is coadministered with ramelteon, monitor the patient closely for toxicity.Minor (1)hydrocortisone will decrease the level or effect of ramelteon by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• ranolazine

  Monitor Closely (2)ranolazine will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  ciprofloxacin and ranolazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.Serious - Use Alternative (1)hydrocortisone will decrease the level or effect of ranolazine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• rasagiline

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of rasagiline by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Ciprofloxacin may increase rasagiline concentration resulting in increased adverse reactions. Patients should be closely monitored during concomitant use of these drugs.

• repaglinide

  Monitor Closely (2)hydrocortisone will decrease the level or effect of repaglinide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin increases effects of repaglinide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (1)hydrocortisone decreases effects of repaglinide by pharmacodynamic antagonism. Minor/Significance Unknown.

• ribociclib

  Serious - Use Alternative (1)ribociclib increases toxicity of ciprofloxacin by QTc interval. Avoid or Use Alternate Drug.

• rifabutin

  Serious - Use Alternative (1)rifabutin will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• rifampin

  Monitor Closely (1)rifampin will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Serious - Use Alternative (1)rifampin will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• rifapentine

  Monitor Closely (1)rifapentine will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• rilpivirine

  Monitor Closely (1)rilpivirine increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Rilpivirine should be used with caution when co-administered with a drug with a known risk of Torsades de Pointes.

• riluzole

  Monitor Closely (1)ciprofloxacin will increase the level or effect of riluzole by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• rimonabant

  Monitor Closely (1)hydrocortisone will decrease the level or effect of rimonabant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• ritonavir

  Monitor Closely (3)ritonavir will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of ritonavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ritonavir will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• rocuronium

  Monitor Closely (1)rocuronium, hydrocortisone. Other (see comment). Use Caution/Monitor. Comment: Coadministration of corticosteroids and neuromuscular blockers may increase risk of developing acute myopathy.

• romidepsin

  Monitor Closely (1)hydrocortisone will decrease the level or effect of romidepsin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• ropinirole

  Monitor Closely (1)ciprofloxacin will increase the level or effect of ropinirole by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Ciprofloxacin may decrease the metabolism of ropinirole; monitor for increased effects of ropinirole.

• ropivacaine

  Monitor Closely (1)ciprofloxacin will increase the level or effect of ropivacaine by Mechanism: decreasing metabolism. Use Caution/Monitor. Monitor for increased ropivacaine toxicity.

• rosiglitazone

  Monitor Closely (1)ciprofloxacin increases effects of rosiglitazone by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (1)hydrocortisone decreases effects of rosiglitazone by pharmacodynamic antagonism. Minor/Significance Unknown.

• rotavirus oral vaccine, live

  Serious - Use Alternative (1)hydrocortisone decreases effects of rotavirus oral vaccine, live by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• rubella vaccine

  Serious - Use Alternative (1)hydrocortisone decreases effects of rubella vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• rufinamide

  Monitor Closely (1)rufinamide will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• ruxolitinib

  Minor (1)ciprofloxacin will increase the level or effect of ruxolitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• ruxolitinib topical

  Minor (1)ciprofloxacin will increase the level or effect of ruxolitinib topical by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• salicylates (non-asa)

  Monitor Closely (1)salicylates (non-asa), hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.Minor (1)hydrocortisone decreases levels of salicylates (non-asa) by increasing renal clearance. Minor/Significance Unknown.

• salsalate

  Monitor Closely (1)salsalate, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.Minor (1)hydrocortisone decreases levels of salsalate by increasing renal clearance. Minor/Significance Unknown.

• saquinavir

  Monitor Closely (2)hydrocortisone will decrease the level or effect of saquinavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin and saquinavir both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.Serious - Use Alternative (1)saquinavir increases levels of ciprofloxacin by pharmacodynamic synergism. Avoid or Use Alternate Drug. Potential for increased toxicity. Increased risk of QT prolongation and cardiac arrhythmias.

• sarecycline

  Monitor Closely (2)sarecycline will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor for toxicities of P-gp substrates that may require dosage reduction when coadministered with P-gp inhibitors.
  
  sarecycline will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor for toxicities of P-gp substrates that may require dosage reduction when coadministered with P-gp inhibitors.

• sargramostim

  Minor (1)hydrocortisone increases effects of sargramostim by pharmacodynamic synergism. Minor/Significance Unknown.

• saxagliptin

  Monitor Closely (1)ciprofloxacin increases effects of saxagliptin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (2)hydrocortisone decreases effects of saxagliptin by pharmacodynamic antagonism. Minor/Significance Unknown.
  
  hydrocortisone will decrease the level or effect of saxagliptin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• secobarbital

  Monitor Closely (1)secobarbital will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• selinexor

  Serious - Use Alternative (1)selinexor, ciprofloxacin. unspecified interaction mechanism. Avoid or Use Alternate Drug. Patients treated with selinexor may experience neurological toxicities. Avoid taking selinexor with other medications that may cause dizziness or confusion.

• selpercatinib

  Monitor Closely (1)selpercatinib increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor.

• sertindole

  Serious - Use Alternative (1)hydrocortisone will decrease the level or effect of sertindole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• sertraline

  Monitor Closely (1)sertraline and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• sevelamer

  Monitor Closely (1)sevelamer decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Administer oral quinolones at least 1 hour before or 3 hours after sevelamer. .

• sevoflurane

  Serious - Use Alternative (1)sevoflurane and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• sildenafil

  Monitor Closely (1)hydrocortisone will decrease the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• silodosin

  Serious - Use Alternative (1)hydrocortisone will decrease the level or effect of silodosin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• simvastatin

  Monitor Closely (1)simvastatin will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Serious - Use Alternative (1)hydrocortisone will decrease the level or effect of simvastatin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• siponimod

  Serious - Use Alternative (1)siponimod and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

• sipuleucel-T

  Monitor Closely (1)hydrocortisone decreases effects of sipuleucel-T by pharmacodynamic antagonism. Modify Therapy/Monitor Closely.

• sirolimus

  Monitor Closely (1)sirolimus will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Serious - Use Alternative (1)hydrocortisone will decrease the level or effect of sirolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• sitagliptin

  Monitor Closely (1)ciprofloxacin increases effects of sitagliptin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (1)hydrocortisone decreases effects of sitagliptin by pharmacodynamic antagonism. Minor/Significance Unknown.

• smallpox (vaccinia) vaccine, live

  Serious - Use Alternative (1)hydrocortisone decreases effects of smallpox (vaccinia) vaccine, live by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• sodium bicarbonate

  Monitor Closely (1)sodium bicarbonate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. A large proportion of ciprofloxacin is normally excreted unchanged in the urine. When urinary alkalinizing agents such as sodium bicarbonate are used concomitantly, the solubility of ciprofloxacin can be decreased because of alkaline urine. Patients should be monitored for crystalluria and nephrotoxicity.

• sodium citrate/citric acid

  Monitor Closely (1)sodium citrate/citric acid decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. A large proportion of ciprofloxacin is normally excreted unchanged in the urine. When urinary alkalinizing agents such as sodium citrate are used concomitantly, the solubility of ciprofloxacin can be decreased because of alkaline urine. Patients should be monitored for crystalluria and nephrotoxicity.

• sodium picosulfate/magnesium oxide/anhydrous citric acid

  Monitor Closely (3)ciprofloxacin decreases effects of sodium picosulfate/magnesium oxide/anhydrous citric acid by altering metabolism. Use Caution/Monitor. Coadministration with antibiotics decreases efficacy by altering colonic bacterial flora needed to convert sodium picosulfate to active drug.
  
  sodium picosulfate/magnesium oxide/anhydrous citric acid decreases levels of ciprofloxacin by cation binding in GI tract. Use Caution/Monitor. Take at least 2 hours before and not less than 6 hours after administration of sodium picosulfate, magnesium oxide and anhydrous citric acid to avoid magnesium chelation.
  
  hydrocortisone, sodium picosulfate/magnesium oxide/anhydrous citric acid. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May be associated with fluid and electrolyte imbalances such as hypokalemia.

• sodium sulfate/?magnesium sulfate/potassium chloride

  Monitor Closely (2)sodium sulfate/?magnesium sulfate/potassium chloride decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Modify Therapy/Monitor Closely. Administer fluoroquinolones at least 2 hr before and no less than 6 hr after each dose to avoid chelation with magnesium. .
  
  sodium sulfate/?magnesium sulfate/potassium chloride increases toxicity of hydrocortisone by Other (see comment). Use Caution/Monitor. Comment: Coadministration with medications that cause fluid and electrolyte abnormalities may increase the risk of adverse events of seizure, arrhythmias, and renal impairment.

• sodium sulfate/potassium chloride/magnesium sulfate/polyethylene glycol

  Monitor Closely (1)hydrocortisone and sodium sulfate/potassium chloride/magnesium sulfate/polyethylene glycol both decrease serum potassium. Modify Therapy/Monitor Closely.

• sodium sulfate/potassium sulfate/magnesium sulfate

  Monitor Closely (2)sodium sulfate/potassium sulfate/magnesium sulfate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Modify Therapy/Monitor Closely. Administer fluoroquinolones at least 2 hr before and no less than 6 hr after each dose to avoid chelation with magnesium. .
  
  sodium sulfate/potassium sulfate/magnesium sulfate increases toxicity of hydrocortisone by Other (see comment). Use Caution/Monitor. Comment: Coadministration with medications that cause fluid and electrolyte abnormalities may increase the risk of adverse events of seizure, arrhythmias, and renal impairment.

• solifenacin

  Monitor Closely (2)solifenacin and ciprofloxacin both increase QTc interval. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of solifenacin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• somapacitan

  Monitor Closely (2)hydrocortisone decreases effects of somapacitan by pharmacodynamic antagonism. Use Caution/Monitor. Supraphysiologic glucocorticoid treatment may attenuate growth-promoting effects of growth hormone (GH). Microsomal enzyme 11-beta-hydroxysteroid dehydrogenase type 1 (11-beta-HSD-1) is required for conversion of cortisone to its active metabolite, cortisol, in hepatic and adipose tissue. GH inhibits 11-beta-HSD-1. Consequently, individuals with untreated GH deficiency have relative increases in 11-beta-HSD-1 and serum cortisol. Initiation of GH analogs may result in inhibition of 11-beta-HSD-1 and reduced serum cortisol concentrations.
  
  somapacitan decreases effects of hydrocortisone by Other (see comment). Modify Therapy/Monitor Closely. Comment: Microsomal enzyme 11-beta-hydroxysteroid dehydrogenase type 1 (11-beta-HSD-1) required for cortisone conversion to its active metabolite, cortisol, in hepatic and adipose tissue. GH inhibits 11-beta-HSD-1. Patients treated with glucocorticoid for hypoadrenalism may require increased maintenance or stress doses after initiating somapacitan.

• somatrem

  Monitor Closely (1)hydrocortisone decreases effects of somatrem by pharmacodynamic antagonism. Use Caution/Monitor.

• somatrogon

  Monitor Closely (1)hydrocortisone decreases effects of somatrogon by pharmacodynamic antagonism. Use Caution/Monitor. Supraphysiologic glucocorticoid treatment may attenuate growth-promoting effects of growth hormone (GH). Microsomal enzyme 11-beta-hydroxysteroid dehydrogenase type 1 (11-beta-HSD-1) is required for conversion of cortisone to its active metabolite, cortisol, in hepatic and adipose tissue. GH inhibits 11-beta-HSD-1. Consequently, individuals with untreated GH deficiency have relative increases in 11-beta-HSD-1 and serum cortisol. Initiation of GH analogs may result in inhibition of 11-beta-HSD-1 and reduced serum cortisol concentrations.

• somatropin

  Monitor Closely (1)hydrocortisone decreases effects of somatropin by pharmacodynamic antagonism. Use Caution/Monitor. Supraphysiologic glucocorticoid treatment may attenuate growth-promoting effects of growth hormone (GH). Microsomal enzyme 11-beta-hydroxysteroid dehydrogenase type 1 (11-beta-HSD-1) is required for conversion of cortisone to its active metabolite, cortisol, in hepatic and adipose tissue. GH inhibits 11-beta-HSD-1. Consequently, individuals with untreated GH deficiency have relative increases in 11-beta-HSD-1 and serum cortisol. Initiation of GH analogs may result in inhibition of 11-beta-HSD-1 and reduced serum cortisol concentrations.

• sorafenib

  Monitor Closely (2)hydrocortisone decreases levels of sorafenib by increasing metabolism. Use Caution/Monitor.
  
  sorafenib and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• sotalol

  Monitor Closely (1)ciprofloxacin and sotalol both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• sotorasib

  Serious - Use Alternative (2)sotorasib will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If use is unavoidable, refer to the prescribing information of the P-gp substrate for dosage modifications.
  
  sotorasib will decrease the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If use is unavoidable, refer to the prescribing information of the P-gp substrate for dosage modifications.

• squill

  Serious - Use Alternative (1)hydrocortisone increases toxicity of squill by unspecified interaction mechanism. Avoid or Use Alternate Drug.

• St John's Wort

  Monitor Closely (1)St John's Wort will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Serious - Use Alternative (1)St John's Wort will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• stiripentol

  Monitor Closely (2)stiripentol will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Consider reducing the dose of P-glycoprotein (P-gp) substrates, if adverse reactions are experienced when administered concomitantly with stiripentol.
  
  stiripentol will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Consider reducing the dose of P-glycoprotein (P-gp) substrates, if adverse reactions are experienced when administered concomitantly with stiripentol.

• succinylcholine

  Monitor Closely (1)succinylcholine, hydrocortisone. Other (see comment). Use Caution/Monitor. Comment: Coadministration of corticosteroids and neuromuscular blockers may increase risk of developing acute myopathy.

• sucralfate

  Monitor Closely (1)sucralfate decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. The oral absorption of ciprofloxacin may be significantly reduced by sucralfate secondary to chelation within the GI tract. To help avoid interactions due to chelation, ciprofloxacin should be taken 2 hours before or 6 hours after administration of sucralfate.

• sufentanil

  Minor (1)hydrocortisone will decrease the level or effect of sufentanil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• sulfasalazine

  Monitor Closely (1)sulfasalazine, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.Minor (1)hydrocortisone decreases levels of sulfasalazine by increasing renal clearance. Minor/Significance Unknown.

• sulindac

  Monitor Closely (2)sulindac, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.
  
  sulindac, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• sunitinib

  Monitor Closely (2)hydrocortisone will decrease the level or effect of sunitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  ciprofloxacin and sunitinib both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• tacrolimus

  Monitor Closely (3)hydrocortisone will decrease the level or effect of tacrolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  tacrolimus and ciprofloxacin both increase QTc interval. Use Caution/Monitor.
  
  tacrolimus will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Minor (1)hydrocortisone, tacrolimus. Either increases levels of the other by decreasing metabolism. Minor/Significance Unknown.

• tamoxifen

  Minor (1)hydrocortisone will decrease the level or effect of tamoxifen by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• tasimelteon

  Monitor Closely (1)ciprofloxacin will increase the level or effect of tasimelteon by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Avoid coadministration; potentially large increase in tasimelteon exposure and greater risk of adverse reactions with strong CYP1A2 inhibitors

• tazemetostat

  Monitor Closely (1)hydrocortisone will decrease the level or effect of tazemetostat by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• telavancin

  Monitor Closely (1)ciprofloxacin and telavancin both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• telithromycin

  Minor (1)hydrocortisone will decrease the level or effect of telithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• temazepam

  Minor (1)ciprofloxacin increases levels of temazepam by decreasing metabolism. Minor/Significance Unknown.

• temsirolimus

  Monitor Closely (1)hydrocortisone will decrease the level or effect of temsirolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• tepotinib

  Serious - Use Alternative (2)tepotinib will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If concomitant use unavoidable, reduce the P-gp substrate dosage if recommended in its approved product labeling.
  
  tepotinib will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If concomitant use unavoidable, reduce the P-gp substrate dosage if recommended in its approved product labeling.

• terbinafine

  Monitor Closely (1)ciprofloxacin will increase the level or effect of terbinafine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

• terfenadine

  Serious - Use Alternative (1)hydrocortisone will decrease the level or effect of terfenadine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• testosterone

  Minor (1)testosterone, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• testosterone buccal system

  Minor (1)testosterone buccal system, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• testosterone intranasal

  Serious - Use Alternative (1)testosterone intranasal, hydrocortisone. Either increases effects of the other by Other (see comment). Avoid or Use Alternate Drug. Comment: Coadministration increases risk for edema, particularly in patients with cardiac, renal, or hepatic disease.

• testosterone topical

  Minor (1)testosterone topical, hydrocortisone. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. May enhance edema formation.

• tetanus toxoid adsorbed or fluid

  Serious - Use Alternative (1)hydrocortisone decreases effects of tetanus toxoid adsorbed or fluid by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• tetrabenazine

  Monitor Closely (1)ciprofloxacin and tetrabenazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• theophylline

  Monitor Closely (1)hydrocortisone will decrease the level or effect of theophylline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.Serious - Use Alternative (2)ciprofloxacin will increase the level or effect of theophylline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Concomitant use of theophylline and ciprofloxacin has decreased theophylline clearance and increased plasma levels and symptoms of toxicity. Serious and fatal reactions have included cardiac arrest, seizure, status epilepticus, and respiratory failure. If concomitant use cannot be avoided, monitor theophylline levels and adjust dosage as needed.
  
  ciprofloxacin will increase the level or effect of theophylline by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Concomitant use of theophylline and ciprofloxacin has decreased theophylline clearance and increased plasma levels and symptoms of toxicity. Serious and fatal reactions have included cardiac arrest, seizure, status epilepticus, and respiratory failure. If concomitant use cannot be avoided, monitor theophylline levels and adjust dosage as needed.

• thiamine

  Minor (1)ciprofloxacin will decrease the level or effect of thiamine by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• thioridazine

  Monitor Closely (1)ciprofloxacin and thioridazine both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.

• tick-borne encephalitis vaccine

  Serious - Use Alternative (1)hydrocortisone decreases effects of tick-borne encephalitis vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• timolol

  Minor (1)ciprofloxacin increases levels of timolol by decreasing metabolism. Minor/Significance Unknown. May also rarely decrease beta blocker levels.

• tinidazole

  Monitor Closely (1)ciprofloxacin will increase the level or effect of tinidazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• tinzaparin

  Monitor Closely (1)hydrocortisone, tinzaparin. Other (see comment). Use Caution/Monitor. Comment: Corticosteroids may decrease anticoagulant effects by increasing blood coagulability; conversely, they may impair vascular integrity, thus increasing bleeding risk. Monitor INR closely.

• tipranavir

  Monitor Closely (1)hydrocortisone will decrease the level or effect of tipranavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• tisagenlecleucel

  Serious - Use Alternative (1)hydrocortisone, tisagenlecleucel. Either increases effects of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug. Avoid prophylactic use of systemic corticosteroids as premedication before CAR-T cell therapy. Corticosteroids may, however, be required for treatment of cytokine release syndrome or neurologic toxicity.

• tizanidine

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of tizanidine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug. Coadministration of ciprofloxacin and tizanidine is contraindicated.

• tobramycin inhaled

  Monitor Closely (1)tobramycin inhaled and ciprofloxacin both increase nephrotoxicity and/or ototoxicity. Modify Therapy/Monitor Closely. Avoid concurrent or sequential use to decrease risk for ototoxicity

• tofacitinib

  Serious - Use Alternative (1)hydrocortisone, tofacitinib. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Avoid or Use Alternate Drug.

• tolazamide

  Monitor Closely (1)ciprofloxacin increases effects of tolazamide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (1)hydrocortisone decreases effects of tolazamide by pharmacodynamic antagonism. Minor/Significance Unknown.

• tolbutamide

  Monitor Closely (1)ciprofloxacin increases effects of tolbutamide by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (1)hydrocortisone decreases effects of tolbutamide by pharmacodynamic antagonism. Minor/Significance Unknown.

• tolfenamic acid

  Monitor Closely (1)tolfenamic acid, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.

• tolmetin

  Monitor Closely (2)tolmetin, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
  
  tolmetin, ciprofloxacin. Other (see comment). Modify Therapy/Monitor Closely. Comment: Mechanism: unknown. Increased risk of CNS stimulation and seizures with high doses of fluoroquinolones.

• tolterodine

  Monitor Closely (1)hydrocortisone will decrease the level or effect of tolterodine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• tolvaptan

  Monitor Closely (1)tolvaptan will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Serious - Use Alternative (1)hydrocortisone will decrease the level or effect of tolvaptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

• topiramate

  Monitor Closely (1)topiramate will decrease the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• toremifene

  Serious - Use Alternative (1)ciprofloxacin and toremifene both increase QTc interval. Avoid or Use Alternate Drug. Concurrent use of toremifene with agents causing QT prolongation should be avoided. If concomitant use is required it's recommended that toremifene be interrupted. If interruption not possible, patients requiring therapy with a drug that prolongs QT should be closely monitored. ECGs should be obtained for high risk patients.

• torsemide

  Minor (1)hydrocortisone, torsemide. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. Risk of hypokalemia, especially with strong glucocorticoid activity.

• trastuzumab

  Monitor Closely (1)trastuzumab, hydrocortisone. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .

• trastuzumab deruxtecan

  Monitor Closely (1)trastuzumab deruxtecan, hydrocortisone. Either increases toxicity of the other by immunosuppressive effects; risk of infection. Use Caution/Monitor. Neutropenia or febrile neutropenia incidence were increased when trastuzumab was coadministered with myelosuppressive chemotherapy. .

• travelers diarrhea and cholera vaccine inactivated

  Serious - Use Alternative (1)hydrocortisone decreases effects of travelers diarrhea and cholera vaccine inactivated by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• trazodone

  Monitor Closely (2)hydrocortisone will decrease the level or effect of trazodone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  trazodone will decrease the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• tretinoin

  Serious - Use Alternative (1)ciprofloxacin, tretinoin. Mechanism: pharmacodynamic synergism. Avoid or Use Alternate Drug. Both drugs have increased risk of phototoxicity, use caution with concomitant use.

• tretinoin topical

  Serious - Use Alternative (1)ciprofloxacin, tretinoin topical. Mechanism: pharmacodynamic synergism. Avoid or Use Alternate Drug. Both drugs have increased risk of phototoxicity, use caution with concomitant use.

• triamcinolone acetonide injectable suspension

  Monitor Closely (2)hydrocortisone will decrease the level or effect of triamcinolone acetonide injectable suspension by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  triamcinolone acetonide injectable suspension and ciprofloxacin both increase Other (see comment). Use Caution/Monitor. Coadministration of quinolone antibiotics and corticosteroids may increase risk of tendon rupture.

• triazolam

  Monitor Closely (1)hydrocortisone will decrease the level or effect of triazolam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.Minor (1)ciprofloxacin increases levels of triazolam by decreasing metabolism. Minor/Significance Unknown.

• trilaciclib

  Serious - Use Alternative (1)trilaciclib will decrease the level or effect of ciprofloxacin by Other (see comment). Avoid or Use Alternate Drug. Avoid coadministration of trilaciclib (OCT2, MATE1, and MATE-2K inhibitor) with substrates where minimal increased concentration in kidney or blood may lead to serious or life-threatening toxicities.

• trimagnesium citrate anhydrous

  Monitor Closely (1)trimagnesium citrate anhydrous decreases levels of ciprofloxacin by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor. Multivalent cation-containing products may reduce bioavailability of quinolones; administer quinolone at least 2 hr before or 6 hr after magnesium; use alternatives if available.

• triptorelin

  Monitor Closely (1)triptorelin increases toxicity of ciprofloxacin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

• troglitazone

  Minor (1)hydrocortisone decreases effects of troglitazone by pharmacodynamic antagonism. Minor/Significance Unknown.

• troleandomycin

  Minor (1)hydrocortisone will decrease the level or effect of troleandomycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• tucatinib

  Monitor Closely (2)tucatinib will increase the level or effect of ciprofloxacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Consider reducing the dosage of P-gp substrates, where minimal concentration changes may lead to serious or life-threatening toxicities.
  
  tucatinib will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Consider reducing the dosage of P-gp substrates, where minimal concentration changes may lead to serious or life-threatening toxicities.

• typhoid polysaccharide vaccine

  Serious - Use Alternative (1)hydrocortisone decreases effects of typhoid polysaccharide vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• typhoid vaccine live

  Serious - Use Alternative (2)hydrocortisone decreases effects of typhoid vaccine live by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.
  
  ciprofloxacin decreases effects of typhoid vaccine live by pharmacodynamic antagonism. Contraindicated. Antibiotics may diminish the therapeutic effects of Typhoid Vaccine. Wait until Abx Tx complete to administer live bacterial vaccine.

• ublituximab

  Monitor Closely (1)ublituximab and hydrocortisone both increase immunosuppressive effects; risk of infection. Modify Therapy/Monitor Closely. Owing to potential additive immunosuppressive effects, consider duration of effect and mechanism of action of these therapies if coadministered

• ubrogepant

  Monitor Closely (1)hydrocortisone will decrease the level or effect of ubrogepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Dose adjustment is recommended with concomitant use of ubrogepant and moderate and weak CYP3A4 inducers. (see Dosage Modifications)

• umeclidinium bromide/vilanterol inhaled

  Serious - Use Alternative (1)ciprofloxacin increases toxicity of umeclidinium bromide/vilanterol inhaled by QTc interval. Avoid or Use Alternate Drug. Exercise extreme caution when vilanterol coadministered with drugs that prolong QTc interval; adrenergic agonist effects on the cardiovascular system may be potentiated.

• valbenazine

  Monitor Closely (1)valbenazine and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• vandetanib

  Serious - Use Alternative (1)ciprofloxacin, vandetanib. Either increases toxicity of the other by QTc interval. Avoid or Use Alternate Drug. Avoid coadministration with drugs known to prolong QT interval; if a drug known to prolong QT interval must be used, more frequent ECG monitoring is recommended.

• vardenafil

  Monitor Closely (1)hydrocortisone will decrease the level or effect of vardenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• varicella virus vaccine live

  Serious - Use Alternative (1)hydrocortisone decreases effects of varicella virus vaccine live by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• vecuronium

  Monitor Closely (1)vecuronium, hydrocortisone. Other (see comment). Use Caution/Monitor. Comment: Coadministration of corticosteroids and neuromuscular blockers may increase risk of developing acute myopathy.

• vemurafenib

  Serious - Use Alternative (1)vemurafenib and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug. Concomitant use of vemurafenib with drugs that prolong QT interval is not recommended.

• venetoclax

  Serious - Use Alternative (1)ciprofloxacin will increase the level or effect of venetoclax by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If a moderate CYP3A inhibitor must be used, reduce the venetoclax dose by at least 50%. Monitor more closely for signs of venetoclax toxicities.

• verapamil

  Monitor Closely (3)verapamil will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  hydrocortisone will decrease the level or effect of verapamil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  verapamil will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• vesnarinone

  Minor (1)hydrocortisone will decrease the level or effect of vesnarinone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• vilanterol/fluticasone furoate inhaled

  Serious - Use Alternative (1)ciprofloxacin increases toxicity of vilanterol/fluticasone furoate inhaled by QTc interval. Avoid or Use Alternate Drug. Exercise extreme caution when vilanterol coadministered with drugs that prolong QTc interval; adrenergic agonist effects on the cardiovascular system may be potentiated.

• vildagliptin

  Monitor Closely (1)ciprofloxacin increases effects of vildagliptin by pharmacodynamic synergism. Use Caution/Monitor. Hyper and hypoglycemia have been reported in patients treated concomitantly with quinolones and antidiabetic agents. Careful monitoring of blood glucose is recommended.Minor (1)hydrocortisone decreases effects of vildagliptin by pharmacodynamic antagonism. Minor/Significance Unknown.

• vinblastine

  Minor (1)hydrocortisone will decrease the level or effect of vinblastine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• vincristine

  Minor (1)hydrocortisone will decrease the level or effect of vincristine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• vincristine liposomal

  Minor (1)hydrocortisone will decrease the level or effect of vincristine liposomal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• vinorelbine

  Minor (1)hydrocortisone will decrease the level or effect of vinorelbine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• vitamin K1 (phytonadione)

  Minor (1)ciprofloxacin will decrease the level or effect of vitamin K1 (phytonadione) by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

• voclosporin

  Monitor Closely (1)voclosporin, ciprofloxacin. Either increases effects of the other by QTc interval. Use Caution/Monitor.

• voriconazole

  Monitor Closely (1)voriconazole will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• vorinostat

  Monitor Closely (1)vorinostat and ciprofloxacin both increase QTc interval. Use Caution/Monitor.

• warfarin

  Monitor Closely (2)hydrocortisone increases effects of warfarin by unspecified interaction mechanism. Use Caution/Monitor.
  
  ciprofloxacin increases effects of warfarin by unspecified interaction mechanism. Use Caution/Monitor.

• willow bark

  Minor (1)hydrocortisone decreases levels of willow bark by increasing renal clearance. Minor/Significance Unknown.

• xipamide

  Monitor Closely (1)xipamide, hydrocortisone. pharmacodynamic synergism. Use Caution/Monitor. Risk of hypokalemia.

• yellow fever vaccine

  Serious - Use Alternative (1)hydrocortisone decreases effects of yellow fever vaccine by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• zafirlukast

  Monitor Closely (1)zafirlukast will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• zaleplon

  Minor (1)hydrocortisone will decrease the level or effect of zaleplon by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• zinc

  Monitor Closely (1)zinc will decrease the level or effect of ciprofloxacin by cation binding in GI tract. Modify Therapy/Monitor Closely. Ciprofloxacin should be administered 2 hr before or 6 hr after zinc salts.

• ziprasidone

  Monitor Closely (1)ciprofloxacin and ziprasidone both increase QTc interval. Use Caution/Monitor. Ciprofloxacin elicits minimal effects on QT interval. Caution if used in combination with other drugs known to affect QT interval or in patients with other risk factors.Minor (1)hydrocortisone will decrease the level or effect of ziprasidone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• zolpidem

  Monitor Closely (2)ciprofloxacin will increase the level or effect of zolpidem by affecting hepatic enzyme CYP1A2 metabolism. Modify Therapy/Monitor Closely.
  
  ciprofloxacin will increase the level or effect of zolpidem by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely.Minor (1)hydrocortisone will decrease the level or effect of zolpidem by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• zonisamide

  Minor (1)hydrocortisone will decrease the level or effect of zonisamide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

• zoster vaccine live

  Serious - Use Alternative (1)hydrocortisone decreases effects of zoster vaccine live by pharmacodynamic antagonism. Contraindicated. Corticosteroids also increase risk of infection with concomitant live vaccines.

• zoster vaccine recombinant

  Monitor Closely (1)hydrocortisone decreases effects of zoster vaccine recombinant by pharmacodynamic antagonism. Use Caution/Monitor. Immunosuppressive therapies may reduce the effectiveness of zoster vaccine recombinant.