paliperidone (Rx)

Schizophrenia

PO

• 6 mg PO qAM; may be titrated upward or downward in increments of 3 mg/day at intervals ≥5 days; not to exceed 12 mg/day

IM, extended-released 1-month (Invega Sustenna)

• 234 mg in deltoid on treatment day 1, then 156 mg 1 week later (day 8)
• Recommended maintenance dose is 117 mg IM once monthly, although some patients may require lower or higher dosages (monthly dose range 39-234 mg)

IM, extended-released 3-months (Invega Trinza)

• Patients must be adequately treated with Invega Sustenna (1-month paliperidone) for at least 4 months before initiating Invega Trinza

• Dose initiation dependent on once-monthly Invega Sustenna dose

  • Initiate Invega Trinza when the next 1-month paliperidone dose is scheduled with an Invega Trinza dose based on the previous 1-month injection dose (see below)

• Conversion from monthly injection to 3-month injection

  • Invega Sustenna 78 mg/month: Initiate Invega Trinza at 273 mg IM q3mo
  • Invega Sustenna 117 mg/month: Initiate Invega Trinza at 410 mg IM q3mo
  • Invega Sustenna 156 mg/month: Initiate Invega Trinza at 546 mg IM q3mo
  • Invega Sustenna 234 mg/month: Initiate Invega Trinza at 819 mg IM q3mo

• Conversion from 3-month IM injection to extended-release tablets

  • 273 mg IM (last 3 months to 24wk): 3 mg ER tab
  • 410 mg IM (last 3 months to 24wk): 3 mg ER tab; 6 mg if >24wk
  • 546 mg IM (last 3 months to 18 wk): 3 mg ER tab; 6 mg if 18-24 wk; 9 mg if >24 wk
  • 819 mg IM (last 3 months to 18 wk): 6 mg ER tab; 9 mg if 18-24 wk; 12 mg if >24 wk

IM, extended-released 6-months (Invega Hafyera)

• Patients must be adequately treated with Invega Sustenna (1-month paliperidone) for at least 4 months OR with Invega Trinza (3-month paliperidone) for at least one 3-month cycle before initiating Invega Hafyera

• Conversion from monthly injection to 6-month injection

  • Initiate Invega Hafyera when next Invega Sustenna dose is scheduled
  • Invega Sustenna 156 mg/month: Initiate Invega Hafyera at 1,092 mg IM q6mo
  • Invega Sustenna 234 mg/month: Initiate Invega Hafyera at 1,560 mg IM q6mo
  • There are no equivalent doses of Invega Hafyera for Invega Sustenna 39-mg, 78-mg, or 117-mg doses, which were not studied

• Conversion from 3-month injection to 6-month injection

  • Initial Invega Hafyera dose is based on the previous Invega Trinza
  • Initiate Invega Hafyera when next Invega Trinza dose is scheduled
  • May administer Invega Hafyera dose up to 2 weeks before or after the next scheduled Invega Trinza
  • Invega Trinza 546 mg q3mo: Initiate Invega Hafyera at 1,092 mg IM q6mo
  • Invega Trinza 819 mg q3mo: Initiate Invega Hafyera at 1,560 mg IM q6mo
  • There are no equivalent doses of Invega Hafyera for Invega Trinza 273-mg or 410-mg doses, which were not studied

• Dosing interval and dosage adjustments

  • Following initial dose, administer Invega Hafyera IM q6mo
  • May adjust dosage every 6 months between 1,092 mg and 1,560 mg based on individual response and tolerability, if necessary
  • Owing to the potential longer duration to Invega Hafyera, patient’s response to an adjusted dose may not be apparent for several months

Schizoaffective Disorder

Indicated for schizoaffective disorder as monotherapy and as an adjunct to mood stabilizers or antidepressants

6 mg PO qDay in am (range 3-12 mg); titration may not be necessary; if exceeding 6 mg/day, increases of 3 mg/day recommended at intervals of 4 days of more; not to exceed 12 mg/day

IM (initial): 234 mg in deltoid on treatment day 1, then 156 mg 1 week later (day 8)

IM (maintenance): Administer once each month IM in deltoid or gluteal muscle; adjust dose based on tolerability and/or efficacy using available strengths; maintenance dose ranges between 78-234 mg once monthly

Dosing Modifications

Renal impairment (PO)

• CrCl 50-79 mL/min: 3 mg/day initially; not to exceed 6 mg/day
• CrCl 10-49 mL/min: 1.5 mg/day initially; not to exceed 3 mg/day
• CrCl <10 mL/min: Not recommended

Renal impairment (IM)

• Invega Hafyera: Not recommended for all severities of renal impairment

• Invega Sustenna

  • Mild (CrCl 50-79 mL/min): 156 mg IM in deltoid on treatment day 1, then 117 mg 1 week later; maintenance: 78 mg IM monthly
  • Moderate to severe (CrCl <50 mL/min): Not recommended

• Invega Trinza

  • Mild (CrCl 50-79 mL/min): Adjust dosage and stabilize the patient using the 1-month paliperidone palmitate extended-release injectable suspension (Invega Sustenna), then transition to Invega Trinza
  • Moderate to severe (CrCl <50 mL/min): Not recommended

Hepatic impairment

• IM: Not studied

• PO

  • Mild-to-moderate: No dosage adjustment necessary
  • Severe: Not studied

Dosing Considerations

Patients with Parkinson disease or dementia with Lewy bodies can experience increased sensitivity to paliperidone

Manifestations can include confusion, obtundation, postural instability with frequent falls, extrapyramidal symptoms, and clinical features consistent with neuroleptic malignant syndrome

Schizophrenia

<12 years: Safety and efficacy not established

≥12 years (<51 kg): 3 mg/day PO initially; may be increased if necessary in increments of 3 mg/day at intervals ≥5 days; not to exceed 6 mg/day

≥12 years (≥51 kg): 3 mg/day PO initially; may be increased if necessary in increments of 3 mg/day at intervals ≥5 days; not to exceed 12 mg/day

Schizoaffective Disorder

<18 years: Safety and efficacy not established

After oral administration in elderly subjects, the peak plasma concentration and AUC increased 1.2-fold compared to young subjects; may be attributable to age-related decreases in creatinine clearance

Contraindicated (3)

• amisulpride

  amisulpride, paliperidone. Either increases toxicity of the other by Other (see comment). Contraindicated. Comment: Increases risk of neuroleptic malignant syndrome.

• goserelin

  goserelin increases toxicity of paliperidone by QTc interval. Contraindicated. Increases risk of torsades de pointes.

• leuprolide

  leuprolide increases toxicity of paliperidone by QTc interval. Contraindicated. Increases risk of torsades de pointes.

Serious - Use Alternative (96)

• afatinib

  paliperidone increases levels of afatinib by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Reduce afatinib daily dose by 10 mg if not tolerated when coadministered with P-gp inhibitors.

• alfuzosin

  alfuzosin and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• amiodarone

  amiodarone and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• amisulpride

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

• anagrelide

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

• apomorphine

  paliperidone decreases effects of apomorphine by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
  
  apomorphine and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• aripiprazole

  aripiprazole and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• arsenic trioxide

  arsenic trioxide and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• artemether

  artemether and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• asenapine

  asenapine and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• asenapine transdermal

  asenapine transdermal and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• atomoxetine

  atomoxetine and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• benzhydrocodone/acetaminophen

  benzhydrocodone/acetaminophen, paliperidone. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Profound sedation, respiratory depression, coma, and death may result if coadministered. Reserve concomitant prescribing of these drugs in patients for whom other treatment options are inadequate. Limit dosages and durations to the minimum required. Monitor closely for signs of respiratory depression and sedation.

• bromocriptine

  paliperidone decreases effects of bromocriptine by pharmacodynamic antagonism. Avoid or Use Alternate Drug.

• buprenorphine

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

• cabergoline

  paliperidone decreases effects of cabergoline by pharmacodynamic antagonism. Contraindicated.

• calcium/magnesium/potassium/sodium oxybates

  paliperidone, calcium/magnesium/potassium/sodium oxybates. Either increases effects of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Profound sedation, respiratory depression, coma, and death may result if coadministered. Reserve concomitant prescribing of these drugs in patients for whom other treatment options are inadequate. Limit dosages and durations to the minimum required. Monitor closely for signs of respiratory depression and sedation.

• ceritinib

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

• clozapine

  clozapine and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• degarelix

  degarelix and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• desflurane

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

• disopyramide

  disopyramide and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• donepezil

  donepezil and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• dopamine

  paliperidone decreases effects of dopamine by pharmacodynamic antagonism. Contraindicated.

• edoxaban

  paliperidone will increase the level or effect of edoxaban by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Dose adjustment may be required with strong P-gp inhibitors. DVT/PE treatment: Decrease dose to 30 mg PO once daily. NVAF: No dose reduction recommended

• eliglustat

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

• encorafenib

  encorafenib and paliperidone both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• entrectinib

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

• erdafitinib

  erdafitinib will increase the level or effect of paliperidone 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.

• eribulin

  eribulin and paliperidone both increase QTc interval. Avoid or Use Alternate Drug. Potential for enhanced QTc-prolonging effects; if concurrent use is necessary then ECG monitoring is recommended.

• escitalopram

  escitalopram increases toxicity of paliperidone by QTc interval. Avoid or Use Alternate Drug.

• fexinidazole

  fexinidazole and paliperidone 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.

• fingolimod

  fingolimod and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• gilteritinib

  gilteritinib and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• glasdegib

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

• granisetron

  granisetron and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• histrelin

  histrelin increases toxicity of paliperidone by QTc interval. Avoid or Use Alternate Drug. Increases risk of torsades de pointes.

• hydrocodone

  hydrocodone, paliperidone. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Profound sedation, respiratory depression, coma, and death may result if coadministered. Reserve concomitant prescribing of these drugs in patients for whom other treatment options are inadequate. Limit dosages and durations to the minimum required. Monitor closely for signs of respiratory depression and sedation.

• hydroxychloroquine sulfate

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

• hydroxyzine

  hydroxyzine and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• ibutilide

  ibutilide and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• indapamide

  indapamide and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• inotuzumab

  inotuzumab and paliperidone 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.

• isoflurane

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

• ivosidenib

  ivosidenib and paliperidone 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 paliperidone by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

• lefamulin

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

• levodopa

  paliperidone decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.

• levodopa inhaled

  paliperidone decreases effects of levodopa inhaled by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Atypical (2nd generation) antipsychotics inhibit dopamine D2 receptors in varying degrees (clozapine and quetiapine are lower risk). .

• lisuride

  paliperidone decreases effects of lisuride by pharmacodynamic antagonism. Contraindicated.

• lithium

  lithium and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• macimorelin

  macimorelin and paliperidone 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.

• mefloquine

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

• methyldopa

  paliperidone decreases effects of methyldopa by pharmacodynamic antagonism. Contraindicated.

• metoclopramide intranasal

  paliperidone, metoclopramide intranasal. Either increases effects of the other by Other (see comment). Avoid or Use Alternate Drug. Comment: Avoid use of metoclopramide intranasal or interacting drug, depending on importance of drug to patient.
  
  paliperidone increases toxicity of metoclopramide intranasal by pharmacodynamic synergism. Avoid or Use Alternate Drug. Potential for additive effects, including increased frequency and severity of tardive dyskinesia, other extrapyramidal symptoms, and neuroleptic malignant syndrome.

• mirtazapine

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

• mobocertinib

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

• olanzapine

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

• olopatadine intranasal

  paliperidone and olopatadine intranasal both increase sedation. Avoid or Use Alternate Drug. Coadministration increases risk of CNS depression, which can lead to additive impairment of psychomotor performance and cause daytime impairment.

• ondansetron

  paliperidone 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 will increase the level or effect of paliperidone by Other (see comment). Avoid or Use Alternate Drug. Monitor for ECG changes if therapy is initiated in patients with drugs known to prolong QT interval.
  
  oxaliplatin and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• panobinostat

  paliperidone 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.

• pentamidine

  paliperidone and pentamidine both increase QTc interval. Avoid or Use Alternate Drug.

• pimavanserin

  paliperidone and pimavanserin both increase QTc interval. Avoid or Use Alternate Drug. Coadministration may increase the risk of QT prolongation and cardiac arrhythmia.

• pimozide

  paliperidone and pimozide both increase QTc interval. Avoid or Use Alternate Drug.

• pitolisant

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

• pomalidomide

  paliperidone increases levels of pomalidomide by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

• pramipexole

  paliperidone decreases effects of pramipexole by pharmacodynamic antagonism. Contraindicated.

• primaquine

  primaquine and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• procainamide

  paliperidone and procainamide both increase QTc interval. Avoid or Use Alternate Drug.

• quinidine

  quinidine will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.
  
  quinidine and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• ribociclib

  ribociclib and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• riociguat

  paliperidone will increase the level or effect of riociguat by decreasing metabolism. Avoid or Use Alternate Drug. Coadministration of riociguat (substrate of CYP isoenzymes 1A1, 2C8, 3A, 2J2) with strong CYP inhibitors may require a decreased initial dose of 0.5 mg PO TID; monitor for signs of hypotension and reduce dose if needed

• romidepsin

  paliperidone and romidepsin both increase QTc interval. Avoid or Use Alternate Drug.

• ropinirole

  paliperidone decreases effects of ropinirole by pharmacodynamic antagonism. Contraindicated.

• safinamide

  paliperidone decreases effects of safinamide by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Dopamine antagonists may decrease safinamide effects and exacerbate Parkinson disease symptoms.

• saquinavir

  saquinavir, paliperidone. Either increases toxicity of the other by QTc interval. Avoid or Use Alternate Drug. Increased risk of QT prolongation and cardiac arrhythmias.

• selinexor

  selinexor, paliperidone. 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.

• sertraline

  sertraline and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• sevoflurane

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

• siponimod

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

• sodium oxybate

  paliperidone, sodium oxybate. Either increases effects of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Profound sedation, respiratory depression, coma, and death may result if coadministered. Reserve concomitant prescribing of these drugs in patients for whom other treatment options are inadequate. Limit dosages and durations to the minimum required. Monitor closely for signs of respiratory depression and sedation.

• solifenacin

  solifenacin and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• sotalol

  paliperidone and sotalol both increase QTc interval. Avoid or Use Alternate Drug.

• sotorasib

  sotorasib will decrease the level or effect of paliperidone 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.

• sufentanil SL

  sufentanil SL, paliperidone. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Coadministration may result in hypotension, profound sedation, respiratory depression, coma, and death. Reserve concomitant prescribing of these drugs in patients for whom other treatment options are inadequate. Limit dosages and durations to the minimum required. Monitor closely for signs of respiratory depression and sedation.

• sunitinib

  sunitinib and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• tacrolimus

  tacrolimus and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• tepotinib

  tepotinib will increase the level or effect of paliperidone 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.

• triptorelin

  triptorelin increases toxicity of paliperidone by QTc interval. Avoid or Use Alternate Drug. Increases risk of torsades de pointes.

• umeclidinium bromide/vilanterol inhaled

  paliperidone 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.

• vandetanib

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

• venetoclax

  paliperidone will increase the level or effect of venetoclax by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If a P-gp inhibitor must be used, reduce the venetoclax dose by at least 50%. Monitor more closely for signs of venetoclax toxicities.

• vilanterol/fluticasone furoate inhaled

  paliperidone 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.

• vorinostat

  vorinostat and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

Monitor Closely (378)

• abobotulinumtoxinA

  abobotulinumtoxinA increases effects of paliperidone by pharmacodynamic synergism. Use Caution/Monitor. Use of anticholinergic drugs after administration of botulinum toxin-containing products may potentiate systemic anticholinergic effects.

• acarbose

  paliperidone, acarbose. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• aclidinium

  aclidinium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of aclidinium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• albiglutide

  paliperidone, albiglutide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• albuterol

  paliperidone increases and albuterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
  
  albuterol and paliperidone both increase QTc interval. Use Caution/Monitor.

• alfentanil

  alfentanil and paliperidone both increase sedation. Use Caution/Monitor.

• alfuzosin

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

• almotriptan

  almotriptan, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• alprazolam

  alprazolam and paliperidone both increase sedation. Use Caution/Monitor.

• amifostine

  amifostine, paliperidone. Either increases effects of the other by anti-hypertensive channel blocking. Use Caution/Monitor. Due to its alpha adrenergic antagonism, atypical antipsychotic agents has the potential to enhance the effect of certain antihypertensive agents. Monitor blood pressure and adjust dose accordingly.

• amiodarone

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

• amitriptyline

  amitriptyline and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and amitriptyline both increase sedation. Use Caution/Monitor.

• amobarbital

  amobarbital and paliperidone both increase sedation. Use Caution/Monitor.

• amoxapine

  paliperidone and amoxapine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Modify Therapy/Monitor Closely.
  
  amoxapine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and amoxapine both increase sedation. Use Caution/Monitor.

• anticholinergic/sedative combos

  anticholinergic/sedative combos decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  anticholinergic/sedative combos decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of anticholinergic/sedative combos by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• apomorphine

  paliperidone and apomorphine both increase sedation. Use Caution/Monitor.

• arformoterol

  paliperidone increases and arformoterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
  
  arformoterol and paliperidone both increase QTc interval. Use Caution/Monitor.

• aripiprazole

  aripiprazole and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  aripiprazole and paliperidone both increase sedation. Use Caution/Monitor.

• armodafinil

  paliperidone increases and armodafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• artemether/lumefantrine

  artemether/lumefantrine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• atorvastatin

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

• atracurium

  atracurium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  atracurium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of atracurium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• atropine

  atropine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  atropine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of atropine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• atropine IV/IM

  paliperidone increases effects of atropine IV/IM by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.
  
  atropine IV/IM decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  atropine IV/IM decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.

• azelastine

  azelastine and paliperidone both increase sedation. Use Caution/Monitor.

• baclofen

  baclofen and paliperidone both increase sedation. Use Caution/Monitor.

• bedaquiline

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

• belladonna alkaloids

  belladonna alkaloids decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  belladonna alkaloids decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of belladonna alkaloids by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• belladonna and opium

  belladonna and opium and paliperidone both increase sedation. Use Caution/Monitor.
  
  belladonna and opium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  belladonna and opium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of belladonna and opium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• benazepril

  paliperidone increases toxicity of benazepril by pharmacodynamic synergism. Use Caution/Monitor. Increases risk of hypotension.
  
  benazepril increases toxicity of paliperidone by pharmacodynamic synergism. Use Caution/Monitor. Increases risk of hypotension.

• benperidol

  benperidol and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  benperidol and paliperidone both increase sedation. Use Caution/Monitor.

• benzphetamine

  paliperidone increases and benzphetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• berotralstat

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

• betrixaban

  paliperidone increases levels of betrixaban by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Decrease betrixaban dose to 80 mg PO once, then 40 mg PO qDay if coadministered with a P-gp inhibitor.

• bosutinib

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

• brexanolone

  brexanolone, paliperidone. Either increases toxicity of the other by sedation. Use Caution/Monitor.

• brompheniramine

  brompheniramine and paliperidone both increase sedation. Use Caution/Monitor.

• buprenorphine

  buprenorphine and paliperidone both increase sedation. Use Caution/Monitor.

• buprenorphine buccal

  buprenorphine buccal and paliperidone both increase sedation. Use Caution/Monitor.

• buprenorphine, long-acting injection

  paliperidone increases toxicity of buprenorphine, long-acting injection by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of buprenorphine and benzodiazepines or other CNS depressants increases risk of adverse reactions including overdose, respiratory depression, and death. Cessation of benzodiazepines or other CNS depressants is preferred in most cases. In some cases, monitoring at a higher level of care for tapering CNS depressants may be appropriate. In others, gradually tapering a patient off of a prescribed benzodiazepine or other CNS depressant or decreasing to the lowest effective dose may be appropriate.

• butabarbital

  butabarbital and paliperidone both increase sedation. Use Caution/Monitor.

• butalbital

  butalbital and paliperidone both increase sedation. Use Caution/Monitor.

• butorphanol

  butorphanol and paliperidone both increase sedation. Use Caution/Monitor.

• caffeine

  paliperidone increases and caffeine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• captopril

  paliperidone, captopril. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Both drugs lower blood pressure. Monitor blood pressure.

• carbamazepine

  carbamazepine will decrease the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Paliperidone dose may need to be increased when coadministered with strong inducers of both CYP3A4 and P-gp

• carbinoxamine

  carbinoxamine and paliperidone both increase sedation. Use Caution/Monitor.

• carisoprodol

  carisoprodol and paliperidone both increase sedation. Use Caution/Monitor.

• cenobamate

  cenobamate, paliperidone. Either increases effects of the other by sedation. Use Caution/Monitor.

• ceritinib

  paliperidone increases levels of ceritinib by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• chloral hydrate

  chloral hydrate and paliperidone both increase sedation. Use Caution/Monitor.

• chlordiazepoxide

  chlordiazepoxide and paliperidone both increase sedation. Use Caution/Monitor.

• chloroquine

  chloroquine increases toxicity of paliperidone by QTc interval. Use Caution/Monitor.

• chlorpheniramine

  chlorpheniramine and paliperidone both increase sedation. Use Caution/Monitor.

• chlorpromazine

  chlorpromazine and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  chlorpromazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  chlorpromazine and paliperidone both increase sedation. Use Caution/Monitor.

• chlorpropamide

  paliperidone, chlorpropamide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• chlorzoxazone

  chlorzoxazone and paliperidone both increase sedation. Use Caution/Monitor.

• cinnarizine

  cinnarizine and paliperidone both increase sedation. Use Caution/Monitor.

• ciprofloxacin

  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.

• cisatracurium

  cisatracurium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  cisatracurium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of cisatracurium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• citalopram

  paliperidone 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 paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  clarithromycin and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• clemastine

  clemastine and paliperidone both increase sedation. Use Caution/Monitor.

• clobazam

  paliperidone, clobazam. Other (see comment). Use Caution/Monitor. Comment: Concomitant administration can increase the potential for CNS effects (e.g., increased sedation or respiratory depression).

• clomipramine

  clomipramine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and clomipramine both increase sedation. Use Caution/Monitor.

• clonazepam

  clonazepam and paliperidone both increase sedation. Use Caution/Monitor.

• clonidine

  clonidine, paliperidone. Mechanism: pharmacodynamic synergism. Use Caution/Monitor. Additive hypotensive effects; potential delirium.

• clorazepate

  clorazepate and paliperidone both increase sedation. Use Caution/Monitor.

• clotrimazole

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

• clozapine

  clozapine and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  clozapine and paliperidone both increase sedation. Use Caution/Monitor.

• codeine

  codeine and paliperidone both increase sedation. Use Caution/Monitor.

• crizotinib

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

• cyclizine

  cyclizine and paliperidone both increase sedation. Use Caution/Monitor.
  
  cyclizine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  cyclizine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of cyclizine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• cyclobenzaprine

  cyclobenzaprine and paliperidone both increase sedation. Use Caution/Monitor.
  
  cyclobenzaprine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  cyclobenzaprine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of cyclobenzaprine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• cyproheptadine

  cyproheptadine and paliperidone both increase sedation. Use Caution/Monitor.

• dabigatran

  paliperidone will increase the level or effect of dabigatran by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Atrial fibrillation: Avoid coadministering dabigatran with P-gp inhibitors if CrCl <30 mL/min. DVT/PE treatment: Avoid coadministering dabigatran with P-gp inhibitors if CrCl <50 mL/min

• dantrolene

  dantrolene and paliperidone both increase sedation. Use Caution/Monitor.

• daridorexant

  paliperidone and daridorexant both increase sedation. Modify Therapy/Monitor Closely. Coadministration increases risk of CNS depression, which can lead to additive impairment of psychomotor performance and cause daytime impairment.

• darifenacin

  darifenacin decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  darifenacin decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of darifenacin by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• dasatinib

  dasatinib and paliperidone both increase QTc interval. Use Caution/Monitor.

• desflurane

  desflurane and paliperidone both increase sedation. Use Caution/Monitor.

• desipramine

  desipramine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and desipramine both increase sedation. Use Caution/Monitor.

• deutetrabenazine

  paliperidone and deutetrabenazine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Modify Therapy/Monitor Closely. The risk for parkinsonism, neuroleptic malignant syndrome, and akathisia may be increased by concomitant use of deutetrabenazine and dopamine antagonists or antipsychotics.
  
  paliperidone and deutetrabenazine both increase sedation. Use Caution/Monitor.
  
  paliperidone and deutetrabenazine 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).

• dexchlorpheniramine

  dexchlorpheniramine and paliperidone both increase sedation. Use Caution/Monitor.

• dexfenfluramine

  paliperidone increases and dexfenfluramine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• dexmedetomidine

  dexmedetomidine and paliperidone both increase sedation. Use Caution/Monitor.

• dexmethylphenidate

  paliperidone increases and dexmethylphenidate decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• dextroamphetamine

  paliperidone increases and dextroamphetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• dextromethorphan

  dextromethorphan, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• dextromoramide

  dextromoramide and paliperidone both increase sedation. Use Caution/Monitor.

• diamorphine

  diamorphine and paliperidone both increase sedation. Use Caution/Monitor.

• diazepam

  diazepam and paliperidone both increase sedation. Use Caution/Monitor.

• dicyclomine

  dicyclomine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  dicyclomine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of dicyclomine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• diethylpropion

  paliperidone increases and diethylpropion decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• difelikefalin

  difelikefalin and paliperidone both increase sedation. Use Caution/Monitor.

• difenoxin hcl

  difenoxin hcl and paliperidone both increase sedation. Use Caution/Monitor.

• dihydroergotamine

  dihydroergotamine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• dimenhydrinate

  dimenhydrinate and paliperidone both increase sedation. Use Caution/Monitor.

• diphenhydramine

  diphenhydramine and paliperidone both increase sedation. Use Caution/Monitor.
  
  diphenhydramine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  diphenhydramine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of diphenhydramine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• diphenoxylate hcl

  diphenoxylate hcl and paliperidone both increase sedation. Use Caution/Monitor.

• dipipanone

  dipipanone and paliperidone both increase sedation. Use Caution/Monitor.

• dobutamine

  paliperidone increases and dobutamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• dofetilide

  dofetilide and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• dolasetron

  dolasetron and paliperidone both increase QTc interval. Use Caution/Monitor.

• dopamine

  paliperidone increases and dopamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• dopexamine

  paliperidone increases and dopexamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• dosulepin

  paliperidone and dosulepin both increase sedation. Use Caution/Monitor.

• doxepin

  doxepin and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and doxepin both increase sedation. Use Caution/Monitor.

• doxylamine

  doxylamine and paliperidone both increase sedation. Use Caution/Monitor.

• dronedarone

  dronedarone will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  dronedarone and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• droperidol

  droperidol and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  droperidol and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  droperidol and paliperidone both increase sedation. Use Caution/Monitor.

• elagolix

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

• eletriptan

  eletriptan, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• eliglustat

  eliglustat increases levels of paliperidone 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.

• ephedrine

  paliperidone increases and ephedrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• epinephrine

  epinephrine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone increases and epinephrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• epinephrine racemic

  epinephrine racemic and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone increases and epinephrine racemic decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• ergoloid mesylates

  ergoloid mesylates, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• ergotamine

  ergotamine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• erythromycin base

  erythromycin base will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  erythromycin base and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• erythromycin ethylsuccinate

  erythromycin ethylsuccinate will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  erythromycin ethylsuccinate and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• erythromycin lactobionate

  erythromycin lactobionate will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  erythromycin lactobionate and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• erythromycin stearate

  erythromycin stearate will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  erythromycin stearate and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• esketamine intranasal

  esketamine intranasal, paliperidone. Either increases toxicity of the other by sedation. Modify Therapy/Monitor Closely.

• estazolam

  estazolam and paliperidone both increase sedation. Use Caution/Monitor.

• ethanol

  paliperidone and ethanol both increase sedation. Use Caution/Monitor.

• exenatide injectable solution

  paliperidone, exenatide injectable solution. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• exenatide injectable suspension

  paliperidone, exenatide injectable suspension. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• ezogabine

  ezogabine, paliperidone. 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

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

• fenfluramine

  paliperidone increases and fenfluramine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
  
  paliperidone decreases effects of fenfluramine by pharmacodynamic antagonism. Use Caution/Monitor. Potent serotonin receptor antagonists may decrease fenfluramine efficacy. If coadministered, monitor appropriately.

• fentanyl

  fentanyl, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• fesoterodine

  fesoterodine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  fesoterodine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of fesoterodine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• flavoxate

  flavoxate decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  flavoxate decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of flavoxate by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• flecainide

  flecainide and paliperidone both increase QTc interval. Use Caution/Monitor.

• flibanserin

  flibanserin, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• fluconazole

  fluconazole and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• fluoxetine

  fluoxetine and paliperidone both increase QTc interval. Use Caution/Monitor.

• fluphenazine

  fluphenazine and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  fluphenazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  fluphenazine and paliperidone both increase sedation. Use Caution/Monitor.

• flurazepam

  flurazepam and paliperidone both increase sedation. Use Caution/Monitor.

• fluvoxamine

  fluvoxamine and paliperidone both increase QTc interval. Use Caution/Monitor.

• formoterol

  formoterol and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone increases and formoterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• foscarnet

  foscarnet and paliperidone both increase QTc interval. Use Caution/Monitor.

• fosphenytoin

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

• fostemsavir

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

• frovatriptan

  frovatriptan, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• ganaxolone

  paliperidone and ganaxolone both increase sedation. Use Caution/Monitor.

• gemifloxacin

  gemifloxacin and paliperidone both increase QTc interval. Use Caution/Monitor.

• gemtuzumab

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

• glecaprevir/pibrentasvir

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

• glimepiride

  paliperidone, glimepiride. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• glipizide

  paliperidone, glipizide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• glyburide

  paliperidone, glyburide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• glycopyrrolate

  paliperidone increases effects of glycopyrrolate by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• glycopyrrolate inhaled

  glycopyrrolate inhaled decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  glycopyrrolate inhaled decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of glycopyrrolate inhaled by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• guanfacine

  guanfacine, paliperidone. Mechanism: pharmacodynamic synergism. Use Caution/Monitor. Additive hypotensive effects; potential delirium.

• haloperidol

  haloperidol and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  haloperidol and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  haloperidol and paliperidone both increase sedation. Use Caution/Monitor.

• henbane

  henbane decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  henbane decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of henbane by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• homatropine

  homatropine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  homatropine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of homatropine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• hydromorphone

  hydromorphone and paliperidone both increase sedation. Use Caution/Monitor.

• hydroxyzine

  hydroxyzine and paliperidone both increase sedation. Use Caution/Monitor.

• hyoscyamine

  hyoscyamine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  hyoscyamine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of hyoscyamine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• hyoscyamine spray

  paliperidone increases effects of hyoscyamine spray by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.
  
  hyoscyamine spray decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  hyoscyamine spray decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.

• iloperidone

  iloperidone and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  iloperidone and paliperidone both increase QTc interval. Use Caution/Monitor.
  
  iloperidone and paliperidone both increase sedation. Use Caution/Monitor.

• imipramine

  imipramine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and imipramine both increase sedation. Use Caution/Monitor.

• indacaterol, inhaled

  indacaterol, inhaled, paliperidone. 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 paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• insulin aspart

  paliperidone, insulin aspart. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• insulin degludec

  paliperidone decreases effects of insulin degludec by Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; dose of antidiabetic agents may need adjustment and increased frequency of glucose monitoring may be required.

• insulin degludec/insulin aspart

  paliperidone decreases effects of insulin degludec/insulin aspart by Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; dose of antidiabetic agents may need adjustment and increased frequency of glucose monitoring may be required.

• insulin detemir

  paliperidone, insulin detemir. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• insulin glargine

  paliperidone, insulin glargine. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• insulin glulisine

  paliperidone, insulin glulisine. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• insulin inhaled

  paliperidone decreases effects of insulin inhaled by Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; dose of antidiabetic agents may need adjustment and increased frequency of glucose monitoring may be required.

• insulin lispro

  paliperidone, insulin lispro. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• insulin NPH

  paliperidone, insulin NPH. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• insulin regular human

  paliperidone, insulin regular human. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• ipratropium

  ipratropium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  ipratropium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of ipratropium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• isoproterenol

  paliperidone increases and isoproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• istradefylline

  istradefylline will increase the level or effect of paliperidone 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 paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  itraconazole will increase the level or effect of paliperidone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

• ketoconazole

  ketoconazole will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  ketoconazole and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• ketotifen, ophthalmic

  paliperidone and ketotifen, ophthalmic both increase sedation. Use Caution/Monitor.

• lapatinib

  lapatinib will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  lapatinib and paliperidone both increase QTc interval. Use Caution/Monitor.

• lasmiditan

  lasmiditan, paliperidone. Either increases effects of the other by sedation. Use Caution/Monitor. Coadministration of lasmiditan and other CNS depressant drugs, including alcohol have not been evaluated in clinical studies. Lasmiditan may cause sedation, as well as other cognitive and/or neuropsychiatric adverse reactions.

• lemborexant

  lemborexant, paliperidone. Either increases effects of the other by sedation. Modify Therapy/Monitor Closely. Dosage adjustment may be necessary if lemborexant is coadministered with other CNS depressants because of potentially additive effects.

• lenvatinib

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

• levalbuterol

  paliperidone increases and levalbuterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• levofloxacin

  levofloxacin and paliperidone both increase QTc interval. Use Caution/Monitor.

• levoketoconazole

  levoketoconazole and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  levoketoconazole will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• levomilnacipran

  levomilnacipran, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• levorphanol

  levorphanol and paliperidone both increase sedation. Use Caution/Monitor.

• linezolid

  linezolid, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• liraglutide

  paliperidone, liraglutide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• lisdexamfetamine

  paliperidone increases and lisdexamfetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• lithium

  lithium, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• lofepramine

  lofepramine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and lofepramine both increase sedation. Use Caution/Monitor.

• lofexidine

  paliperidone and lofexidine both increase sedation. Use Caution/Monitor.
  
  paliperidone and lofexidine both increase QTc interval. Use Caution/Monitor. ECG monitoring is recommended.

• lomitapide

  lomitapide increases levels of paliperidone 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 paliperidone 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.

• loprazolam

  loprazolam and paliperidone both increase sedation. Use Caution/Monitor.

• loratadine

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

• lorazepam

  lorazepam and paliperidone both increase sedation. Use Caution/Monitor.

• lorcaserin

  lorcaserin, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• lormetazepam

  lormetazepam and paliperidone both increase sedation. Use Caution/Monitor.

• lovastatin

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

• loxapine

  loxapine and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  loxapine and paliperidone both increase sedation. Use Caution/Monitor.

• loxapine inhaled

  loxapine inhaled and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  loxapine inhaled and paliperidone both increase sedation. Use Caution/Monitor.

• lumefantrine

  lumefantrine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• lurasidone

  lurasidone, paliperidone. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: Potential for increased CNS depressant effects when used concurrently; monitor for increased adverse effects and toxicity.

• maprotiline

  maprotiline and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and maprotiline both increase sedation. Use Caution/Monitor.

• maraviroc

  maraviroc, paliperidone. Either increases effects of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of orthostatic hypotension.

• marijuana

  paliperidone and marijuana both increase sedation. Use Caution/Monitor.

• meclizine

  meclizine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  meclizine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of meclizine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• melatonin

  paliperidone and melatonin both increase sedation. Use Caution/Monitor.

• meperidine

  meperidine and paliperidone both increase sedation. Use Caution/Monitor.
  
  meperidine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• meprobamate

  paliperidone and meprobamate both increase sedation. Use Caution/Monitor.

• metaproterenol

  paliperidone increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• metaxalone

  metaxalone and paliperidone both increase sedation. Use Caution/Monitor.

• metformin

  paliperidone, metformin. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• methadone

  methadone and paliperidone both increase QTc interval. Use Caution/Monitor.
  
  methadone and paliperidone both increase sedation. Use Caution/Monitor.
  
  methadone, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• methamphetamine

  paliperidone increases and methamphetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• methocarbamol

  methocarbamol and paliperidone both increase sedation. Use Caution/Monitor.

• methscopolamine

  methscopolamine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  methscopolamine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of methscopolamine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• methylenedioxymethamphetamine

  paliperidone increases and methylenedioxymethamphetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• methylergonovine

  methylergonovine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• methylphenidate

  paliperidone increases toxicity of methylphenidate by pharmacodynamic antagonism. Use Caution/Monitor. Closely monitor for signs of altered clinical response to either methylphenidate or an antipsychotic when using these drugs in combination.

• metoclopramide

  paliperidone and metoclopramide both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.

• midazolam

  midazolam and paliperidone both increase sedation. Use Caution/Monitor.

• midazolam intranasal

  midazolam intranasal, paliperidone. Either increases toxicity of the other by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Concomitant use of barbiturates, alcohol, or other CNS depressants may increase the risk of hypoventilation, airway obstruction, desaturation, or apnea and may contribute to profound and/or prolonged drug effect.

• midodrine

  paliperidone increases and midodrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• mifepristone

  mifepristone, paliperidone. QTc interval. Modify Therapy/Monitor Closely. Use alternatives if available.

• miglitol

  paliperidone, miglitol. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• milnacipran

  milnacipran, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• mirtazapine

  paliperidone and mirtazapine both increase sedation. Use Caution/Monitor.

• modafinil

  paliperidone increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• morphine

  morphine and paliperidone both increase sedation. Use Caution/Monitor.

• motherwort

  paliperidone and motherwort both increase sedation. Use Caution/Monitor.

• moxifloxacin

  moxifloxacin and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• moxonidine

  paliperidone and moxonidine both increase sedation. Use Caution/Monitor.

• nabilone

  paliperidone and nabilone both increase sedation. Use Caution/Monitor.

• nalbuphine

  nalbuphine and paliperidone both increase sedation. Use Caution/Monitor.

• naldemedine

  paliperidone increases levels of naldemedine by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor naldemedine for potential adverse effects if coadministered with P-gp inhibitors.

• naratriptan

  naratriptan, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• nateglinide

  paliperidone, nateglinide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• nicardipine

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

• nifedipine

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

• nilotinib

  nilotinib will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  nilotinib and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• nintedanib

  paliperidone increases levels of nintedanib by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. If nintedanib adverse effects occur, management may require interruption, dose reduction, or discontinuation of therapy.

• norepinephrine

  paliperidone increases and norepinephrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• nortriptyline

  nortriptyline and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and nortriptyline both increase sedation. Use Caution/Monitor.

• octreotide

  octreotide and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• octreotide (Antidote)

  octreotide (Antidote) and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• ofloxacin

  ofloxacin and paliperidone both increase QTc interval. Use Caution/Monitor.

• olanzapine

  olanzapine and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  olanzapine and paliperidone both increase sedation. Use Caution/Monitor.

• oliceridine

  oliceridine, paliperidone. Either increases toxicity of the other by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Profound sedation, respiratory depression, coma, and death may result if coadministered. Reserve concomitant prescribing of these drugs in patients for whom other treatment options are inadequate. Limit dosages and durations to the minimum required. Monitor closely for signs of respiratory depression and sedation.

• olodaterol inhaled

  paliperidone 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

• onabotulinumtoxinA

  onabotulinumtoxinA decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  onabotulinumtoxinA decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of onabotulinumtoxinA by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• opium tincture

  opium tincture and paliperidone both increase sedation. Use Caution/Monitor.

• orphenadrine

  orphenadrine and paliperidone both increase sedation. Use Caution/Monitor.

• osilodrostat

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

• osimertinib

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

• oxazepam

  oxazepam and paliperidone both increase sedation. Use Caution/Monitor.

• oxybutynin

  oxybutynin decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  oxybutynin decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of oxybutynin by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• oxybutynin topical

  oxybutynin topical decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  oxybutynin topical decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of oxybutynin topical by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• oxybutynin transdermal

  oxybutynin transdermal decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  oxybutynin transdermal decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of oxybutynin transdermal by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• oxycodone

  oxycodone and paliperidone both increase sedation. Use Caution/Monitor.

• oxymorphone

  oxymorphone and paliperidone both increase sedation. Use Caution/Monitor.

• ozanimod

  ozanimod and paliperidone 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.

• pancuronium

  pancuronium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  pancuronium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of pancuronium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• papaveretum

  papaveretum and paliperidone both increase sedation. Use Caution/Monitor.

• papaverine

  paliperidone and papaverine both increase sedation. Use Caution/Monitor.

• paroxetine

  paliperidone and paroxetine both increase QTc interval. Use Caution/Monitor.
  
  paroxetine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• pasireotide

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

• pentazocine

  pentazocine and paliperidone both increase sedation. Use Caution/Monitor.

• pentobarbital

  pentobarbital and paliperidone both increase sedation. Use Caution/Monitor.

• perphenazine

  paliperidone and perphenazine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  perphenazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and perphenazine both increase sedation. Use Caution/Monitor.

• phendimetrazine

  paliperidone increases and phendimetrazine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• phenelzine

  phenelzine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• phenobarbital

  phenobarbital will decrease the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  phenobarbital and paliperidone both increase sedation. Use Caution/Monitor.

• phentermine

  paliperidone increases and phentermine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• phenylephrine

  paliperidone increases and phenylephrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• phenylephrine PO

  paliperidone increases and phenylephrine PO decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. .

• phenytoin

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

• pholcodine

  paliperidone and pholcodine both increase sedation. Use Caution/Monitor.

• pimozide

  paliperidone and pimozide both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and pimozide both increase sedation. Use Caution/Monitor.

• pioglitazone

  paliperidone, pioglitazone. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• pirbuterol

  paliperidone increases and pirbuterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• posaconazole

  paliperidone and posaconazole both increase QTc interval. Use Caution/Monitor.

• pralidoxime

  pralidoxime decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  pralidoxime decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of pralidoxime by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• pramlintide

  paliperidone, pramlintide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• primidone

  primidone and paliperidone both increase sedation. Use Caution/Monitor.

• procarbazine

  procarbazine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• prochlorperazine

  paliperidone and prochlorperazine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  prochlorperazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and prochlorperazine both increase sedation. Use Caution/Monitor.

• promazine

  promazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• promethazine

  paliperidone and promethazine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  promethazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  promethazine and paliperidone both increase sedation. Use Caution/Monitor.
  
  promethazine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• propantheline

  propantheline decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  propantheline decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of propantheline by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• propofol

  propofol and paliperidone both increase sedation. Use Caution/Monitor.

• propylhexedrine

  paliperidone increases and propylhexedrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• protriptyline

  protriptyline and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and protriptyline both increase sedation. Use Caution/Monitor.

• quazepam

  quazepam and paliperidone both increase sedation. Use Caution/Monitor.

• quercetin

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

• quetiapine

  paliperidone and quetiapine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and quetiapine both increase sedation. Use Caution/Monitor.
  
  quetiapine, paliperidone. 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.

• quinine

  paliperidone and quinine both increase QTc interval. Use Caution/Monitor.

• ramelteon

  paliperidone and ramelteon both increase sedation. Use Caution/Monitor.

• ranolazine

  ranolazine will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  paliperidone and ranolazine both increase QTc interval. Use Caution/Monitor.

• rapacuronium

  rapacuronium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  rapacuronium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of rapacuronium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• remimazolam

  remimazolam, paliperidone. Either increases toxicity of the other by sedation. Modify Therapy/Monitor Closely. Coadministration may result in profound sedation, respiratory depression, coma, and/or death. Continuously monitor vital signs during sedation and recovery period if coadministered. Carefully titrate remimazolam dose if administered with opioid analgesics and/or sedative/hypnotics.

• repaglinide

  paliperidone, repaglinide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• rifampin

  rifampin will decrease the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Paliperidone dose may need to be increased when coadministered with strong inducers of both CYP3A4 and P-gp

• rifaximin

  paliperidone increases levels of rifaximin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• rilpivirine

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

• risperidone

  paliperidone and risperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and risperidone both increase QTc interval. Use Caution/Monitor.
  
  paliperidone and risperidone both increase sedation. Use Caution/Monitor.
  
  paliperidone, risperidone. Either increases effects of the other by pharmacodynamic synergism. Use Caution/Monitor. Paliperidone is the major active metabolite of risperidone, consideration should be given to the additive paliperidone exposure if any of these medications are coadministered.

• ritonavir

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

• rocuronium

  rocuronium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  rocuronium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of rocuronium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• rosiglitazone

  paliperidone, rosiglitazone. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• salmeterol

  paliperidone increases and salmeterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• sarecycline

  sarecycline will increase the level or effect of paliperidone 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

  paliperidone, saxagliptin. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• scopolamine

  scopolamine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  scopolamine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of scopolamine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• scullcap

  paliperidone and scullcap both increase sedation. Use Caution/Monitor.

• secobarbital

  secobarbital and paliperidone both increase sedation. Use Caution/Monitor.

• selegiline

  selegiline, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• selpercatinib

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

• shepherd's purse

  paliperidone and shepherd's purse both increase sedation. Use Caution/Monitor.

• simvastatin

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

• sirolimus

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

• sitagliptin

  paliperidone, sitagliptin. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• sodium sulfate/?magnesium sulfate/potassium chloride

  sodium sulfate/?magnesium sulfate/potassium chloride increases toxicity of paliperidone by QTc interval. Use Caution/Monitor. Consider predose and post-colonoscopy ECGs in patients at increased risk of serious cardiac arrhythmias. .
  
  sodium sulfate/?magnesium sulfate/potassium chloride increases effects of paliperidone by unknown mechanism. Use Caution/Monitor. Closely monitor for evidence of enhanced CNS depression when using higher dose of magnesium sulfate together with a CNS depressant.

• sodium sulfate/potassium sulfate/magnesium sulfate

  sodium sulfate/potassium sulfate/magnesium sulfate increases toxicity of paliperidone by QTc interval. Use Caution/Monitor. Consider predose and post-colonoscopy ECGs in patients at increased risk of serious cardiac arrhythmias. .
  
  sodium sulfate/potassium sulfate/magnesium sulfate increases effects of paliperidone by unknown mechanism. Use Caution/Monitor. Closely monitor for evidence of enhanced CNS depression when using higher dose of magnesium sulfate together with a CNS depressant.

• solifenacin

  solifenacin decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  solifenacin decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of solifenacin by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• sorafenib

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

• St John's Wort

  St John's Wort will decrease the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Paliperidone dose may need to be increased when coadministered with strong inducers of both CYP3A4 and P-gp

• stiripentol

  stiripentol will increase the level or effect of paliperidone 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, paliperidone. Either increases effects of the other by sedation. Use Caution/Monitor. Concomitant use stiripentol with other CNS depressants, including alcohol, may increase the risk of sedation and somnolence.

• sufentanil

  sufentanil and paliperidone both increase sedation. Use Caution/Monitor.

• sulfamethoxazole

  sulfamethoxazole and paliperidone both increase QTc interval. Use Caution/Monitor.

• sumatriptan

  sumatriptan, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• sumatriptan intranasal

  sumatriptan intranasal, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• tacrolimus

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

• tapentadol

  tapentadol and paliperidone both increase sedation. Use Caution/Monitor.

• telavancin

  paliperidone and telavancin both increase QTc interval. Use Caution/Monitor.

• temazepam

  temazepam and paliperidone both increase sedation. Use Caution/Monitor.

• terbutaline

  paliperidone increases and terbutaline decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• tetrabenazine

  paliperidone and tetrabenazine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Modify Therapy/Monitor Closely.

• thioridazine

  paliperidone and thioridazine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  thioridazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and thioridazine both increase sedation. Use Caution/Monitor.

• thiothixene

  paliperidone and thiothixene both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and thiothixene both increase sedation. Use Caution/Monitor.

• tiotropium

  tiotropium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  tiotropium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of tiotropium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• tolazamide

  paliperidone, tolazamide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• tolbutamide

  paliperidone, tolbutamide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• tolterodine

  tolterodine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  tolterodine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of tolterodine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• tolvaptan

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

• topiramate

  paliperidone and topiramate both increase sedation. Modify Therapy/Monitor Closely.

• tramadol

  tramadol and paliperidone both increase sedation. Use Caution/Monitor.

• tranylcypromine

  tranylcypromine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• trazodone

  trazodone will decrease the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  trazodone and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and trazodone both increase sedation. Use Caution/Monitor.

• triazolam

  triazolam and paliperidone both increase sedation. Use Caution/Monitor.

• triclabendazole

  triclabendazole and paliperidone both increase QTc interval. Use Caution/Monitor.

• triclofos

  triclofos and paliperidone both increase sedation. Use Caution/Monitor.

• trifluoperazine

  paliperidone and trifluoperazine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  trifluoperazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and trifluoperazine both increase sedation. Use Caution/Monitor.

• trimethoprim

  paliperidone and trimethoprim both increase QTc interval. Use Caution/Monitor.

• trimipramine

  trimipramine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and trimipramine both increase sedation. Use Caution/Monitor.

• triprolidine

  triprolidine and paliperidone both increase sedation. Use Caution/Monitor.

• tropisetron

  paliperidone and tropisetron both increase QTc interval. Use Caution/Monitor.

• trospium chloride

  trospium chloride decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  trospium chloride decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of trospium chloride by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• tucatinib

  tucatinib will increase the level or effect of paliperidone 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.

• valbenazine

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

• vecuronium

  vecuronium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  vecuronium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of vecuronium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• venlafaxine

  paliperidone and venlafaxine both increase QTc interval. Use Caution/Monitor.
  
  venlafaxine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• verapamil

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

• vilazodone

  vilazodone, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• voclosporin

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

• voriconazole

  paliperidone and voriconazole both increase QTc interval. Use Caution/Monitor.

• xylometazoline

  paliperidone increases and xylometazoline decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• yohimbine

  paliperidone increases and yohimbine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• ziconotide

  paliperidone and ziconotide both increase sedation. Use Caution/Monitor.

• ziprasidone

  paliperidone and ziprasidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and ziprasidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and ziprasidone both increase sedation. Use Caution/Monitor.

• zolmitriptan

  zolmitriptan, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• zotepine

  paliperidone and zotepine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and zotepine both increase sedation. Use Caution/Monitor.

Minor (8)

• azithromycin

  azithromycin and paliperidone both increase QTc interval. Minor/Significance Unknown.

• brimonidine

  brimonidine increases effects of paliperidone by pharmacodynamic synergism. Minor/Significance Unknown. Increased CNS depression.

• chasteberry

  chasteberry decreases effects of paliperidone by pharmacodynamic antagonism. Minor/Significance Unknown. (Theoretical interaction).

• ethanol

  ethanol, paliperidone. Either increases toxicity of the other by pharmacodynamic synergism. Minor/Significance Unknown. Additive CNS depression.

• eucalyptus

  paliperidone and eucalyptus both increase sedation. Minor/Significance Unknown.

• nefazodone

  nefazodone will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Minor/Significance Unknown.

• pazopanib

  paliperidone and pazopanib both increase QTc interval. Minor/Significance Unknown.

• sage

  paliperidone and sage both increase sedation. Minor/Significance Unknown.

• abobotulinumtoxinA

  Monitor Closely (1)abobotulinumtoxinA increases effects of paliperidone by pharmacodynamic synergism. Use Caution/Monitor. Use of anticholinergic drugs after administration of botulinum toxin-containing products may potentiate systemic anticholinergic effects.

• acarbose

  Monitor Closely (1)paliperidone, acarbose. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• aclidinium

  Monitor Closely (2)aclidinium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of aclidinium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• afatinib

  Serious - Use Alternative (1)paliperidone increases levels of afatinib by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Reduce afatinib daily dose by 10 mg if not tolerated when coadministered with P-gp inhibitors.

• albiglutide

  Monitor Closely (1)paliperidone, albiglutide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• albuterol

  Monitor Closely (2)paliperidone increases and albuterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
  
  albuterol and paliperidone both increase QTc interval. Use Caution/Monitor.

• alfentanil

  Monitor Closely (1)alfentanil and paliperidone both increase sedation. Use Caution/Monitor.

• alfuzosin

  Monitor Closely (1)paliperidone and alfuzosin both increase QTc interval. Use Caution/Monitor.Serious - Use Alternative (1)alfuzosin and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• almotriptan

  Monitor Closely (1)almotriptan, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• alprazolam

  Monitor Closely (1)alprazolam and paliperidone both increase sedation. Use Caution/Monitor.

• amifostine

  Monitor Closely (1)amifostine, paliperidone. Either increases effects of the other by anti-hypertensive channel blocking. Use Caution/Monitor. Due to its alpha adrenergic antagonism, atypical antipsychotic agents has the potential to enhance the effect of certain antihypertensive agents. Monitor blood pressure and adjust dose accordingly.

• amiodarone

  Monitor Closely (1)amiodarone will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Serious - Use Alternative (1)amiodarone and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• amisulpride

  Contraindicated (1)amisulpride, paliperidone. Either increases toxicity of the other by Other (see comment). Contraindicated. Comment: Increases risk of neuroleptic malignant syndrome.Serious - Use Alternative (1)amisulpride and paliperidone both increase QTc interval. Avoid or Use Alternate Drug. ECG monitoring is recommended if coadministered.

• amitriptyline

  Monitor Closely (2)amitriptyline and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and amitriptyline both increase sedation. Use Caution/Monitor.

• amobarbital

  Monitor Closely (1)amobarbital and paliperidone both increase sedation. Use Caution/Monitor.

• amoxapine

  Monitor Closely (3)paliperidone and amoxapine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Modify Therapy/Monitor Closely.
  
  amoxapine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and amoxapine both increase sedation. Use Caution/Monitor.

• anagrelide

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

• anticholinergic/sedative combos

  Monitor Closely (3)anticholinergic/sedative combos decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  anticholinergic/sedative combos decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of anticholinergic/sedative combos by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• apomorphine

  Monitor Closely (1)paliperidone and apomorphine both increase sedation. Use Caution/Monitor.Serious - Use Alternative (2)paliperidone decreases effects of apomorphine by pharmacodynamic antagonism. Avoid or Use Alternate Drug.
  
  apomorphine and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• arformoterol

  Monitor Closely (2)paliperidone increases and arformoterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
  
  arformoterol and paliperidone both increase QTc interval. Use Caution/Monitor.

• aripiprazole

  Monitor Closely (2)aripiprazole and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  aripiprazole and paliperidone both increase sedation. Use Caution/Monitor.Serious - Use Alternative (1)aripiprazole and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• armodafinil

  Monitor Closely (1)paliperidone increases and armodafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• arsenic trioxide

  Serious - Use Alternative (1)arsenic trioxide and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• artemether

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

• artemether/lumefantrine

  Monitor Closely (1)artemether/lumefantrine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• asenapine

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

• asenapine transdermal

  Serious - Use Alternative (1)asenapine transdermal and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• atomoxetine

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

• atorvastatin

  Monitor Closely (1)atorvastatin will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• atracurium

  Monitor Closely (3)atracurium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  atracurium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of atracurium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• atropine

  Monitor Closely (3)atropine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  atropine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of atropine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• atropine IV/IM

  Monitor Closely (3)paliperidone increases effects of atropine IV/IM by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.
  
  atropine IV/IM decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  atropine IV/IM decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.

• azelastine

  Monitor Closely (1)azelastine and paliperidone both increase sedation. Use Caution/Monitor.

• azithromycin

  Minor (1)azithromycin and paliperidone both increase QTc interval. Minor/Significance Unknown.

• baclofen

  Monitor Closely (1)baclofen and paliperidone both increase sedation. Use Caution/Monitor.

• bedaquiline

  Monitor Closely (1)paliperidone and bedaquiline both increase QTc interval. Modify Therapy/Monitor Closely. ECG should be monitored closely

• belladonna alkaloids

  Monitor Closely (3)belladonna alkaloids decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  belladonna alkaloids decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of belladonna alkaloids by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• belladonna and opium

  Monitor Closely (4)belladonna and opium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  belladonna and opium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of belladonna and opium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.
  
  belladonna and opium and paliperidone both increase sedation. Use Caution/Monitor.

• benazepril

  Monitor Closely (2)paliperidone increases toxicity of benazepril by pharmacodynamic synergism. Use Caution/Monitor. Increases risk of hypotension.
  
  benazepril increases toxicity of paliperidone by pharmacodynamic synergism. Use Caution/Monitor. Increases risk of hypotension.

• benperidol

  Monitor Closely (2)benperidol and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  benperidol and paliperidone both increase sedation. Use Caution/Monitor.

• benzhydrocodone/acetaminophen

  Serious - Use Alternative (1)benzhydrocodone/acetaminophen, paliperidone. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Profound sedation, respiratory depression, coma, and death may result if coadministered. Reserve concomitant prescribing of these drugs in patients for whom other treatment options are inadequate. Limit dosages and durations to the minimum required. Monitor closely for signs of respiratory depression and sedation.

• benzphetamine

  Monitor Closely (1)paliperidone increases and benzphetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• berotralstat

  Monitor Closely (1)berotralstat will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor or titrate P-gp substrate dose if coadministered.

• betrixaban

  Monitor Closely (1)paliperidone increases levels of betrixaban by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Decrease betrixaban dose to 80 mg PO once, then 40 mg PO qDay if coadministered with a P-gp inhibitor.

• bosutinib

  Monitor Closely (1)bosutinib increases levels of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• brexanolone

  Monitor Closely (1)brexanolone, paliperidone. Either increases toxicity of the other by sedation. Use Caution/Monitor.

• brimonidine

  Minor (1)brimonidine increases effects of paliperidone by pharmacodynamic synergism. Minor/Significance Unknown. Increased CNS depression.

• bromocriptine

  Serious - Use Alternative (1)paliperidone decreases effects of bromocriptine by pharmacodynamic antagonism. Avoid or Use Alternate Drug.

• brompheniramine

  Monitor Closely (1)brompheniramine and paliperidone both increase sedation. Use Caution/Monitor.

• buprenorphine

  Monitor Closely (1)buprenorphine and paliperidone both increase sedation. Use Caution/Monitor.Serious - Use Alternative (1)buprenorphine and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• buprenorphine buccal

  Monitor Closely (1)buprenorphine buccal and paliperidone both increase sedation. Use Caution/Monitor.

• buprenorphine, long-acting injection

  Monitor Closely (1)paliperidone increases toxicity of buprenorphine, long-acting injection by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of buprenorphine and benzodiazepines or other CNS depressants increases risk of adverse reactions including overdose, respiratory depression, and death. Cessation of benzodiazepines or other CNS depressants is preferred in most cases. In some cases, monitoring at a higher level of care for tapering CNS depressants may be appropriate. In others, gradually tapering a patient off of a prescribed benzodiazepine or other CNS depressant or decreasing to the lowest effective dose may be appropriate.

• butabarbital

  Monitor Closely (1)butabarbital and paliperidone both increase sedation. Use Caution/Monitor.

• butalbital

  Monitor Closely (1)butalbital and paliperidone both increase sedation. Use Caution/Monitor.

• butorphanol

  Monitor Closely (1)butorphanol and paliperidone both increase sedation. Use Caution/Monitor.

• cabergoline

  Serious - Use Alternative (1)paliperidone decreases effects of cabergoline by pharmacodynamic antagonism. Contraindicated.

• caffeine

  Monitor Closely (1)paliperidone increases and caffeine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• calcium/magnesium/potassium/sodium oxybates

  Serious - Use Alternative (1)paliperidone, calcium/magnesium/potassium/sodium oxybates. Either increases effects of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Profound sedation, respiratory depression, coma, and death may result if coadministered. Reserve concomitant prescribing of these drugs in patients for whom other treatment options are inadequate. Limit dosages and durations to the minimum required. Monitor closely for signs of respiratory depression and sedation.

• captopril

  Monitor Closely (1)paliperidone, captopril. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Both drugs lower blood pressure. Monitor blood pressure.

• carbamazepine

  Monitor Closely (1)carbamazepine will decrease the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Paliperidone dose may need to be increased when coadministered with strong inducers of both CYP3A4 and P-gp

• carbinoxamine

  Monitor Closely (1)carbinoxamine and paliperidone both increase sedation. Use Caution/Monitor.

• carisoprodol

  Monitor Closely (1)carisoprodol and paliperidone both increase sedation. Use Caution/Monitor.

• cenobamate

  Monitor Closely (1)cenobamate, paliperidone. Either increases effects of the other by sedation. Use Caution/Monitor.

• ceritinib

  Monitor Closely (1)paliperidone increases levels of ceritinib by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Serious - Use Alternative (1)ceritinib and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• chasteberry

  Minor (1)chasteberry decreases effects of paliperidone by pharmacodynamic antagonism. Minor/Significance Unknown. (Theoretical interaction).

• chloral hydrate

  Monitor Closely (1)chloral hydrate and paliperidone both increase sedation. Use Caution/Monitor.

• chlordiazepoxide

  Monitor Closely (1)chlordiazepoxide and paliperidone both increase sedation. Use Caution/Monitor.

• chloroquine

  Monitor Closely (1)chloroquine increases toxicity of paliperidone by QTc interval. Use Caution/Monitor.

• chlorpheniramine

  Monitor Closely (1)chlorpheniramine and paliperidone both increase sedation. Use Caution/Monitor.

• chlorpromazine

  Monitor Closely (3)chlorpromazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  chlorpromazine and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  chlorpromazine and paliperidone both increase sedation. Use Caution/Monitor.

• chlorpropamide

  Monitor Closely (1)paliperidone, chlorpropamide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• chlorzoxazone

  Monitor Closely (1)chlorzoxazone and paliperidone both increase sedation. Use Caution/Monitor.

• cinnarizine

  Monitor Closely (1)cinnarizine and paliperidone both increase sedation. Use Caution/Monitor.

• ciprofloxacin

  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.

• cisatracurium

  Monitor Closely (3)cisatracurium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  cisatracurium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of cisatracurium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• citalopram

  Monitor Closely (1)paliperidone 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 (2)clarithromycin will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  clarithromycin and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• clemastine

  Monitor Closely (1)clemastine and paliperidone both increase sedation. Use Caution/Monitor.

• clobazam

  Monitor Closely (1)paliperidone, clobazam. Other (see comment). Use Caution/Monitor. Comment: Concomitant administration can increase the potential for CNS effects (e.g., increased sedation or respiratory depression).

• clomipramine

  Monitor Closely (2)clomipramine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and clomipramine both increase sedation. Use Caution/Monitor.

• clonazepam

  Monitor Closely (1)clonazepam and paliperidone both increase sedation. Use Caution/Monitor.

• clonidine

  Monitor Closely (1)clonidine, paliperidone. Mechanism: pharmacodynamic synergism. Use Caution/Monitor. Additive hypotensive effects; potential delirium.

• clorazepate

  Monitor Closely (1)clorazepate and paliperidone both increase sedation. Use Caution/Monitor.

• clotrimazole

  Monitor Closely (1)clotrimazole will decrease the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• clozapine

  Monitor Closely (2)clozapine and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  clozapine and paliperidone both increase sedation. Use Caution/Monitor.Serious - Use Alternative (1)clozapine and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• codeine

  Monitor Closely (1)codeine and paliperidone both increase sedation. Use Caution/Monitor.

• crizotinib

  Monitor Closely (1)crizotinib and paliperidone both increase QTc interval. Use Caution/Monitor. ECG monitoring is recommended, along with drugs that may prolong the QT interval.

• cyclizine

  Monitor Closely (4)cyclizine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  cyclizine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of cyclizine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.
  
  cyclizine and paliperidone both increase sedation. Use Caution/Monitor.

• cyclobenzaprine

  Monitor Closely (4)cyclobenzaprine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  cyclobenzaprine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of cyclobenzaprine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.
  
  cyclobenzaprine and paliperidone both increase sedation. Use Caution/Monitor.

• cyproheptadine

  Monitor Closely (1)cyproheptadine and paliperidone both increase sedation. Use Caution/Monitor.

• dabigatran

  Monitor Closely (1)paliperidone will increase the level or effect of dabigatran by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Atrial fibrillation: Avoid coadministering dabigatran with P-gp inhibitors if CrCl <30 mL/min. DVT/PE treatment: Avoid coadministering dabigatran with P-gp inhibitors if CrCl <50 mL/min

• dantrolene

  Monitor Closely (1)dantrolene and paliperidone both increase sedation. Use Caution/Monitor.

• daridorexant

  Monitor Closely (1)paliperidone and daridorexant both increase sedation. Modify Therapy/Monitor Closely. Coadministration increases risk of CNS depression, which can lead to additive impairment of psychomotor performance and cause daytime impairment.

• darifenacin

  Monitor Closely (3)darifenacin decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  darifenacin decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of darifenacin by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• dasatinib

  Monitor Closely (1)dasatinib and paliperidone both increase QTc interval. Use Caution/Monitor.

• degarelix

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

• desflurane

  Monitor Closely (1)desflurane and paliperidone both increase sedation. Use Caution/Monitor.Serious - Use Alternative (1)desflurane and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• desipramine

  Monitor Closely (2)desipramine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and desipramine both increase sedation. Use Caution/Monitor.

• deutetrabenazine

  Monitor Closely (3)paliperidone and deutetrabenazine both increase sedation. Use Caution/Monitor.
  
  paliperidone and deutetrabenazine 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).
  
  paliperidone and deutetrabenazine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Modify Therapy/Monitor Closely. The risk for parkinsonism, neuroleptic malignant syndrome, and akathisia may be increased by concomitant use of deutetrabenazine and dopamine antagonists or antipsychotics.

• dexchlorpheniramine

  Monitor Closely (1)dexchlorpheniramine and paliperidone both increase sedation. Use Caution/Monitor.

• dexfenfluramine

  Monitor Closely (1)paliperidone increases and dexfenfluramine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• dexmedetomidine

  Monitor Closely (1)dexmedetomidine and paliperidone both increase sedation. Use Caution/Monitor.

• dexmethylphenidate

  Monitor Closely (1)paliperidone increases and dexmethylphenidate decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• dextroamphetamine

  Monitor Closely (1)paliperidone increases and dextroamphetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• dextromethorphan

  Monitor Closely (1)dextromethorphan, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• dextromoramide

  Monitor Closely (1)dextromoramide and paliperidone both increase sedation. Use Caution/Monitor.

• diamorphine

  Monitor Closely (1)diamorphine and paliperidone both increase sedation. Use Caution/Monitor.

• diazepam

  Monitor Closely (1)diazepam and paliperidone both increase sedation. Use Caution/Monitor.

• dicyclomine

  Monitor Closely (3)dicyclomine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  dicyclomine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of dicyclomine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• diethylpropion

  Monitor Closely (1)paliperidone increases and diethylpropion decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• difelikefalin

  Monitor Closely (1)difelikefalin and paliperidone both increase sedation. Use Caution/Monitor.

• difenoxin hcl

  Monitor Closely (1)difenoxin hcl and paliperidone both increase sedation. Use Caution/Monitor.

• dihydroergotamine

  Monitor Closely (1)dihydroergotamine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• dimenhydrinate

  Monitor Closely (1)dimenhydrinate and paliperidone both increase sedation. Use Caution/Monitor.

• diphenhydramine

  Monitor Closely (4)diphenhydramine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  diphenhydramine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of diphenhydramine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.
  
  diphenhydramine and paliperidone both increase sedation. Use Caution/Monitor.

• diphenoxylate hcl

  Monitor Closely (1)diphenoxylate hcl and paliperidone both increase sedation. Use Caution/Monitor.

• dipipanone

  Monitor Closely (1)dipipanone and paliperidone both increase sedation. Use Caution/Monitor.

• disopyramide

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

• dobutamine

  Monitor Closely (1)paliperidone increases and dobutamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• dofetilide

  Monitor Closely (1)dofetilide and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• dolasetron

  Monitor Closely (1)dolasetron and paliperidone both increase QTc interval. Use Caution/Monitor.

• donepezil

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

• dopamine

  Monitor Closely (1)paliperidone increases and dopamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.Serious - Use Alternative (1)paliperidone decreases effects of dopamine by pharmacodynamic antagonism. Contraindicated.

• dopexamine

  Monitor Closely (1)paliperidone increases and dopexamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• dosulepin

  Monitor Closely (1)paliperidone and dosulepin both increase sedation. Use Caution/Monitor.

• doxepin

  Monitor Closely (2)doxepin and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and doxepin both increase sedation. Use Caution/Monitor.

• doxylamine

  Monitor Closely (1)doxylamine and paliperidone both increase sedation. Use Caution/Monitor.

• dronedarone

  Monitor Closely (2)dronedarone will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  dronedarone and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• droperidol

  Monitor Closely (3)droperidol and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  droperidol and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  droperidol and paliperidone both increase sedation. Use Caution/Monitor.

• edoxaban

  Serious - Use Alternative (1)paliperidone will increase the level or effect of edoxaban by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Dose adjustment may be required with strong P-gp inhibitors. DVT/PE treatment: Decrease dose to 30 mg PO once daily. NVAF: No dose reduction recommended

• elagolix

  Monitor Closely (1)elagolix will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• eletriptan

  Monitor Closely (1)eletriptan, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• eliglustat

  Monitor Closely (1)eliglustat increases levels of paliperidone 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 paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• encorafenib

  Serious - Use Alternative (1)encorafenib and paliperidone both increase QTc interval. Avoid or Use Alternate Drug. Encorafenib is associated with dose-dependent QTc interval prolongation. Avoid with drugs known to prolong QT interval.

• entrectinib

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

• ephedrine

  Monitor Closely (1)paliperidone increases and ephedrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• epinephrine

  Monitor Closely (2)epinephrine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone increases and epinephrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• epinephrine racemic

  Monitor Closely (2)epinephrine racemic and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone increases and epinephrine racemic decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• erdafitinib

  Serious - Use Alternative (1)erdafitinib will increase the level or effect of paliperidone 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.

• ergoloid mesylates

  Monitor Closely (1)ergoloid mesylates, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• ergotamine

  Monitor Closely (1)ergotamine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• eribulin

  Serious - Use Alternative (1)eribulin and paliperidone both increase QTc interval. Avoid or Use Alternate Drug. Potential for enhanced QTc-prolonging effects; if concurrent use is necessary then ECG monitoring is recommended.

• erythromycin base

  Monitor Closely (2)erythromycin base will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  erythromycin base and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• erythromycin ethylsuccinate

  Monitor Closely (2)erythromycin ethylsuccinate will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  erythromycin ethylsuccinate and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• erythromycin lactobionate

  Monitor Closely (2)erythromycin lactobionate will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  erythromycin lactobionate and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• erythromycin stearate

  Monitor Closely (2)erythromycin stearate will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  erythromycin stearate and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• escitalopram

  Serious - Use Alternative (1)escitalopram increases toxicity of paliperidone by QTc interval. Avoid or Use Alternate Drug.

• esketamine intranasal

  Monitor Closely (1)esketamine intranasal, paliperidone. Either increases toxicity of the other by sedation. Modify Therapy/Monitor Closely.

• estazolam

  Monitor Closely (1)estazolam and paliperidone both increase sedation. Use Caution/Monitor.

• ethanol

  Monitor Closely (1)paliperidone and ethanol both increase sedation. Use Caution/Monitor.Minor (1)ethanol, paliperidone. Either increases toxicity of the other by pharmacodynamic synergism. Minor/Significance Unknown. Additive CNS depression.

• eucalyptus

  Minor (1)paliperidone and eucalyptus both increase sedation. Minor/Significance Unknown.

• exenatide injectable solution

  Monitor Closely (1)paliperidone, exenatide injectable solution. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• exenatide injectable suspension

  Monitor Closely (1)paliperidone, exenatide injectable suspension. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• ezogabine

  Monitor Closely (1)ezogabine, paliperidone. 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 (1)felodipine will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• fenfluramine

  Monitor Closely (2)paliperidone decreases effects of fenfluramine by pharmacodynamic antagonism. Use Caution/Monitor. Potent serotonin receptor antagonists may decrease fenfluramine efficacy. If coadministered, monitor appropriately.
  
  paliperidone increases and fenfluramine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• fentanyl

  Monitor Closely (1)fentanyl, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• fesoterodine

  Monitor Closely (3)fesoterodine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  fesoterodine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of fesoterodine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• fexinidazole

  Serious - Use Alternative (1)fexinidazole and paliperidone 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.

• fingolimod

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

• flavoxate

  Monitor Closely (3)flavoxate decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  flavoxate decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of flavoxate by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• flecainide

  Monitor Closely (1)flecainide and paliperidone both increase QTc interval. Use Caution/Monitor.

• flibanserin

  Monitor Closely (1)flibanserin, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• fluconazole

  Monitor Closely (1)fluconazole and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• fluoxetine

  Monitor Closely (1)fluoxetine and paliperidone both increase QTc interval. Use Caution/Monitor.

• fluphenazine

  Monitor Closely (3)fluphenazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  fluphenazine and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  fluphenazine and paliperidone both increase sedation. Use Caution/Monitor.

• flurazepam

  Monitor Closely (1)flurazepam and paliperidone both increase sedation. Use Caution/Monitor.

• fluvoxamine

  Monitor Closely (1)fluvoxamine and paliperidone both increase QTc interval. Use Caution/Monitor.

• formoterol

  Monitor Closely (2)formoterol and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone increases and formoterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• foscarnet

  Monitor Closely (1)foscarnet and paliperidone both increase QTc interval. Use Caution/Monitor.

• fosphenytoin

  Monitor Closely (1)fosphenytoin will decrease the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• fostemsavir

  Monitor Closely (1)paliperidone and fostemsavir both increase QTc interval. Use Caution/Monitor. QTc prolongation reported with higher than recommended doses of fostemsavir.

• frovatriptan

  Monitor Closely (1)frovatriptan, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• ganaxolone

  Monitor Closely (1)paliperidone and ganaxolone both increase sedation. Use Caution/Monitor.

• gemifloxacin

  Monitor Closely (1)gemifloxacin and paliperidone both increase QTc interval. Use Caution/Monitor.

• gemtuzumab

  Monitor Closely (1)paliperidone and gemtuzumab both increase QTc interval. Use Caution/Monitor.

• gilteritinib

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

• glasdegib

  Serious - Use Alternative (1)paliperidone 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)paliperidone will increase the level or effect of glecaprevir/pibrentasvir by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  glecaprevir/pibrentasvir will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• glimepiride

  Monitor Closely (1)paliperidone, glimepiride. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• glipizide

  Monitor Closely (1)paliperidone, glipizide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• glyburide

  Monitor Closely (1)paliperidone, glyburide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• glycopyrrolate

  Monitor Closely (1)paliperidone increases effects of glycopyrrolate by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• glycopyrrolate inhaled

  Monitor Closely (3)glycopyrrolate inhaled decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  glycopyrrolate inhaled decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of glycopyrrolate inhaled by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• goserelin

  Contraindicated (1)goserelin increases toxicity of paliperidone by QTc interval. Contraindicated. Increases risk of torsades de pointes.

• granisetron

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

• guanfacine

  Monitor Closely (1)guanfacine, paliperidone. Mechanism: pharmacodynamic synergism. Use Caution/Monitor. Additive hypotensive effects; potential delirium.

• haloperidol

  Monitor Closely (3)haloperidol and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  haloperidol and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  haloperidol and paliperidone both increase sedation. Use Caution/Monitor.

• henbane

  Monitor Closely (3)henbane decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  henbane decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of henbane by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• histrelin

  Serious - Use Alternative (1)histrelin increases toxicity of paliperidone by QTc interval. Avoid or Use Alternate Drug. Increases risk of torsades de pointes.

• homatropine

  Monitor Closely (3)homatropine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  homatropine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of homatropine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• hydrocodone

  Serious - Use Alternative (1)hydrocodone, paliperidone. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Profound sedation, respiratory depression, coma, and death may result if coadministered. Reserve concomitant prescribing of these drugs in patients for whom other treatment options are inadequate. Limit dosages and durations to the minimum required. Monitor closely for signs of respiratory depression and sedation.

• hydromorphone

  Monitor Closely (1)hydromorphone and paliperidone both increase sedation. Use Caution/Monitor.

• hydroxychloroquine sulfate

  Serious - Use Alternative (1)hydroxychloroquine sulfate and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• hydroxyzine

  Monitor Closely (1)hydroxyzine and paliperidone both increase sedation. Use Caution/Monitor.Serious - Use Alternative (1)hydroxyzine and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• hyoscyamine

  Monitor Closely (3)hyoscyamine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  hyoscyamine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of hyoscyamine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• hyoscyamine spray

  Monitor Closely (3)paliperidone increases effects of hyoscyamine spray by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.
  
  hyoscyamine spray decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  hyoscyamine spray decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.

• ibutilide

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

• iloperidone

  Monitor Closely (3)iloperidone and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  iloperidone and paliperidone both increase QTc interval. Use Caution/Monitor.
  
  iloperidone and paliperidone both increase sedation. Use Caution/Monitor.

• imipramine

  Monitor Closely (2)imipramine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and imipramine both increase sedation. Use Caution/Monitor.

• indacaterol, inhaled

  Monitor Closely (1)indacaterol, inhaled, paliperidone. QTc interval. Use Caution/Monitor. Drugs that are known to prolong the QTc interval may have an increased the risk of ventricular arrhythmias.

• indapamide

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

• indinavir

  Monitor Closely (1)indinavir will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• inotuzumab

  Serious - Use Alternative (1)inotuzumab and paliperidone 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)paliperidone, insulin aspart. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• insulin degludec

  Monitor Closely (1)paliperidone decreases effects of insulin degludec by Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; dose of antidiabetic agents may need adjustment and increased frequency of glucose monitoring may be required.

• insulin degludec/insulin aspart

  Monitor Closely (1)paliperidone decreases effects of insulin degludec/insulin aspart by Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; dose of antidiabetic agents may need adjustment and increased frequency of glucose monitoring may be required.

• insulin detemir

  Monitor Closely (1)paliperidone, insulin detemir. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• insulin glargine

  Monitor Closely (1)paliperidone, insulin glargine. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• insulin glulisine

  Monitor Closely (1)paliperidone, insulin glulisine. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• insulin inhaled

  Monitor Closely (1)paliperidone decreases effects of insulin inhaled by Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; dose of antidiabetic agents may need adjustment and increased frequency of glucose monitoring may be required.

• insulin lispro

  Monitor Closely (1)paliperidone, insulin lispro. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• insulin NPH

  Monitor Closely (1)paliperidone, insulin NPH. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• insulin regular human

  Monitor Closely (1)paliperidone, insulin regular human. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• ipratropium

  Monitor Closely (3)ipratropium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  ipratropium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of ipratropium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• isoflurane

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

• isoproterenol

  Monitor Closely (1)paliperidone increases and isoproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• istradefylline

  Monitor Closely (1)istradefylline will increase the level or effect of paliperidone 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 (2)itraconazole will increase the level or effect of paliperidone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
  
  itraconazole and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• ivosidenib

  Serious - Use Alternative (1)ivosidenib and paliperidone 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.

• ketoconazole

  Monitor Closely (2)ketoconazole will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  ketoconazole and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• ketotifen, ophthalmic

  Monitor Closely (1)paliperidone and ketotifen, ophthalmic both increase sedation. Use Caution/Monitor.

• lapatinib

  Monitor Closely (2)lapatinib will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  lapatinib and paliperidone both increase QTc interval. Use Caution/Monitor.

• lasmiditan

  Monitor Closely (1)lasmiditan, paliperidone. Either increases effects of the other by sedation. Use Caution/Monitor. Coadministration of lasmiditan and other CNS depressant drugs, including alcohol have not been evaluated in clinical studies. Lasmiditan may cause sedation, as well as other cognitive and/or neuropsychiatric adverse reactions.Serious - Use Alternative (1)lasmiditan increases levels of paliperidone by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

• lefamulin

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

• lemborexant

  Monitor Closely (1)lemborexant, paliperidone. Either increases effects of the other by sedation. Modify Therapy/Monitor Closely. Dosage adjustment may be necessary if lemborexant is coadministered with other CNS depressants because of potentially additive effects.

• lenvatinib

  Monitor Closely (1)paliperidone and lenvatinib both increase QTc interval. Use Caution/Monitor. Lenvatinib prescribing information recommends monitoring ECG closely when coadministered with QT prolonging drugs.

• leuprolide

  Contraindicated (1)leuprolide increases toxicity of paliperidone by QTc interval. Contraindicated. Increases risk of torsades de pointes.

• levalbuterol

  Monitor Closely (1)paliperidone increases and levalbuterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• levodopa

  Serious - Use Alternative (1)paliperidone decreases effects of levodopa by pharmacodynamic antagonism. Avoid or Use Alternate Drug.

• levodopa inhaled

  Serious - Use Alternative (1)paliperidone decreases effects of levodopa inhaled by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Atypical (2nd generation) antipsychotics inhibit dopamine D2 receptors in varying degrees (clozapine and quetiapine are lower risk). .

• levofloxacin

  Monitor Closely (1)levofloxacin and paliperidone both increase QTc interval. Use Caution/Monitor.

• levoketoconazole

  Monitor Closely (2)levoketoconazole will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  levoketoconazole and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• levomilnacipran

  Monitor Closely (1)levomilnacipran, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• levorphanol

  Monitor Closely (1)levorphanol and paliperidone both increase sedation. Use Caution/Monitor.

• linezolid

  Monitor Closely (1)linezolid, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• liraglutide

  Monitor Closely (1)paliperidone, liraglutide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• lisdexamfetamine

  Monitor Closely (1)paliperidone increases and lisdexamfetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• lisuride

  Serious - Use Alternative (1)paliperidone decreases effects of lisuride by pharmacodynamic antagonism. Contraindicated.

• lithium

  Monitor Closely (1)lithium, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).Serious - Use Alternative (1)lithium and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• lofepramine

  Monitor Closely (2)lofepramine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and lofepramine both increase sedation. Use Caution/Monitor.

• lofexidine

  Monitor Closely (2)paliperidone and lofexidine both increase QTc interval. Use Caution/Monitor. ECG monitoring is recommended.
  
  paliperidone and lofexidine both increase sedation. Use Caution/Monitor.

• lomitapide

  Monitor Closely (1)lomitapide increases levels of paliperidone 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 paliperidone 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.

• loprazolam

  Monitor Closely (1)loprazolam and paliperidone both increase sedation. Use Caution/Monitor.

• loratadine

  Monitor Closely (1)loratadine will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• lorazepam

  Monitor Closely (1)lorazepam and paliperidone both increase sedation. Use Caution/Monitor.

• lorcaserin

  Monitor Closely (1)lorcaserin, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• lormetazepam

  Monitor Closely (1)lormetazepam and paliperidone both increase sedation. Use Caution/Monitor.

• lovastatin

  Monitor Closely (1)lovastatin will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• loxapine

  Monitor Closely (2)loxapine and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  loxapine and paliperidone both increase sedation. Use Caution/Monitor.

• loxapine inhaled

  Monitor Closely (2)loxapine inhaled and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  loxapine inhaled and paliperidone both increase sedation. Use Caution/Monitor.

• lumefantrine

  Monitor Closely (1)lumefantrine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• lurasidone

  Monitor Closely (1)lurasidone, paliperidone. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: Potential for increased CNS depressant effects when used concurrently; monitor for increased adverse effects and toxicity.

• macimorelin

  Serious - Use Alternative (1)macimorelin and paliperidone 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.

• maprotiline

  Monitor Closely (2)maprotiline and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and maprotiline both increase sedation. Use Caution/Monitor.

• maraviroc

  Monitor Closely (1)maraviroc, paliperidone. Either increases effects of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of orthostatic hypotension.

• marijuana

  Monitor Closely (1)paliperidone and marijuana both increase sedation. Use Caution/Monitor.

• meclizine

  Monitor Closely (3)meclizine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  meclizine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of meclizine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• mefloquine

  Serious - Use Alternative (1)mefloquine increases toxicity of paliperidone 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)paliperidone and melatonin both increase sedation. Use Caution/Monitor.

• meperidine

  Monitor Closely (2)meperidine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).
  
  meperidine and paliperidone both increase sedation. Use Caution/Monitor.

• meprobamate

  Monitor Closely (1)paliperidone and meprobamate both increase sedation. Use Caution/Monitor.

• metaproterenol

  Monitor Closely (1)paliperidone increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• metaxalone

  Monitor Closely (1)metaxalone and paliperidone both increase sedation. Use Caution/Monitor.

• metformin

  Monitor Closely (1)paliperidone, metformin. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• methadone

  Monitor Closely (3)methadone, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).
  
  methadone and paliperidone both increase QTc interval. Use Caution/Monitor.
  
  methadone and paliperidone both increase sedation. Use Caution/Monitor.

• methamphetamine

  Monitor Closely (1)paliperidone increases and methamphetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• methocarbamol

  Monitor Closely (1)methocarbamol and paliperidone both increase sedation. Use Caution/Monitor.

• methscopolamine

  Monitor Closely (3)methscopolamine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  methscopolamine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of methscopolamine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• methyldopa

  Serious - Use Alternative (1)paliperidone decreases effects of methyldopa by pharmacodynamic antagonism. Contraindicated.

• methylenedioxymethamphetamine

  Monitor Closely (1)paliperidone increases and methylenedioxymethamphetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• methylergonovine

  Monitor Closely (1)methylergonovine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• methylphenidate

  Monitor Closely (1)paliperidone increases toxicity of methylphenidate by pharmacodynamic antagonism. Use Caution/Monitor. Closely monitor for signs of altered clinical response to either methylphenidate or an antipsychotic when using these drugs in combination.

• metoclopramide

  Monitor Closely (1)paliperidone and metoclopramide both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.

• metoclopramide intranasal

  Serious - Use Alternative (2)paliperidone, metoclopramide intranasal. Either increases effects of the other by Other (see comment). Avoid or Use Alternate Drug. Comment: Avoid use of metoclopramide intranasal or interacting drug, depending on importance of drug to patient.
  
  paliperidone increases toxicity of metoclopramide intranasal by pharmacodynamic synergism. Avoid or Use Alternate Drug. Potential for additive effects, including increased frequency and severity of tardive dyskinesia, other extrapyramidal symptoms, and neuroleptic malignant syndrome.

• midazolam

  Monitor Closely (1)midazolam and paliperidone both increase sedation. Use Caution/Monitor.

• midazolam intranasal

  Monitor Closely (1)midazolam intranasal, paliperidone. Either increases toxicity of the other by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Concomitant use of barbiturates, alcohol, or other CNS depressants may increase the risk of hypoventilation, airway obstruction, desaturation, or apnea and may contribute to profound and/or prolonged drug effect.

• midodrine

  Monitor Closely (1)paliperidone increases and midodrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• mifepristone

  Monitor Closely (1)mifepristone, paliperidone. QTc interval. Modify Therapy/Monitor Closely. Use alternatives if available.

• miglitol

  Monitor Closely (1)paliperidone, miglitol. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• milnacipran

  Monitor Closely (1)milnacipran, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• mirtazapine

  Monitor Closely (1)paliperidone and mirtazapine both increase sedation. Use Caution/Monitor.Serious - Use Alternative (1)mirtazapine and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• mobocertinib

  Serious - Use Alternative (1)mobocertinib and paliperidone both increase QTc interval. Avoid or Use Alternate Drug. If coadministration unavoidable, reduce mobocertinib dose and monitor QTc interval more frequently.

• modafinil

  Monitor Closely (1)paliperidone increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• morphine

  Monitor Closely (1)morphine and paliperidone both increase sedation. Use Caution/Monitor.

• motherwort

  Monitor Closely (1)paliperidone and motherwort both increase sedation. Use Caution/Monitor.

• moxifloxacin

  Monitor Closely (1)moxifloxacin and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• moxonidine

  Monitor Closely (1)paliperidone and moxonidine both increase sedation. Use Caution/Monitor.

• nabilone

  Monitor Closely (1)paliperidone and nabilone both increase sedation. Use Caution/Monitor.

• nalbuphine

  Monitor Closely (1)nalbuphine and paliperidone both increase sedation. Use Caution/Monitor.

• naldemedine

  Monitor Closely (1)paliperidone increases levels of naldemedine by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor naldemedine for potential adverse effects if coadministered with P-gp inhibitors.

• naratriptan

  Monitor Closely (1)naratriptan, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• nateglinide

  Monitor Closely (1)paliperidone, nateglinide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• nefazodone

  Minor (1)nefazodone will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Minor/Significance Unknown.

• nicardipine

  Monitor Closely (1)nicardipine will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• nifedipine

  Monitor Closely (1)nifedipine will decrease the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• nilotinib

  Monitor Closely (2)nilotinib will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  nilotinib and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• nintedanib

  Monitor Closely (1)paliperidone increases levels of nintedanib by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. If nintedanib adverse effects occur, management may require interruption, dose reduction, or discontinuation of therapy.

• norepinephrine

  Monitor Closely (1)paliperidone increases and norepinephrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• nortriptyline

  Monitor Closely (2)nortriptyline and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and nortriptyline both increase sedation. Use Caution/Monitor.

• octreotide

  Monitor Closely (1)octreotide and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• octreotide (Antidote)

  Monitor Closely (1)octreotide (Antidote) and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• ofloxacin

  Monitor Closely (1)ofloxacin and paliperidone both increase QTc interval. Use Caution/Monitor.

• olanzapine

  Monitor Closely (2)olanzapine and paliperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  olanzapine and paliperidone both increase sedation. Use Caution/Monitor.Serious - Use Alternative (1)olanzapine and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• oliceridine

  Monitor Closely (1)oliceridine, paliperidone. Either increases toxicity of the other by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Profound sedation, respiratory depression, coma, and death may result if coadministered. Reserve concomitant prescribing of these drugs in patients for whom other treatment options are inadequate. Limit dosages and durations to the minimum required. Monitor closely for signs of respiratory depression and sedation.

• olodaterol inhaled

  Monitor Closely (1)paliperidone 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

• olopatadine intranasal

  Serious - Use Alternative (1)paliperidone and olopatadine intranasal both increase sedation. Avoid or Use Alternate Drug. Coadministration increases risk of CNS depression, which can lead to additive impairment of psychomotor performance and cause daytime impairment.

• onabotulinumtoxinA

  Monitor Closely (3)onabotulinumtoxinA decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  onabotulinumtoxinA decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of onabotulinumtoxinA by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• ondansetron

  Serious - Use Alternative (1)paliperidone 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.

• opium tincture

  Monitor Closely (1)opium tincture and paliperidone both increase sedation. Use Caution/Monitor.

• orphenadrine

  Monitor Closely (1)orphenadrine and paliperidone both increase sedation. Use Caution/Monitor.

• osilodrostat

  Monitor Closely (1)osilodrostat and paliperidone both increase QTc interval. Use Caution/Monitor.

• osimertinib

  Monitor Closely (1)osimertinib and paliperidone 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

  Serious - Use Alternative (2)oxaliplatin will increase the level or effect of paliperidone by Other (see comment). Avoid or Use Alternate Drug. Monitor for ECG changes if therapy is initiated in patients with drugs known to prolong QT interval.
  
  oxaliplatin and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• oxazepam

  Monitor Closely (1)oxazepam and paliperidone both increase sedation. Use Caution/Monitor.

• oxybutynin

  Monitor Closely (3)oxybutynin decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  oxybutynin decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of oxybutynin by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• oxybutynin topical

  Monitor Closely (3)oxybutynin topical decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  oxybutynin topical decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of oxybutynin topical by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• oxybutynin transdermal

  Monitor Closely (3)oxybutynin transdermal decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  oxybutynin transdermal decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of oxybutynin transdermal by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• oxycodone

  Monitor Closely (1)oxycodone and paliperidone both increase sedation. Use Caution/Monitor.

• oxymorphone

  Monitor Closely (1)oxymorphone and paliperidone both increase sedation. Use Caution/Monitor.

• ozanimod

  Monitor Closely (1)ozanimod and paliperidone 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.

• pancuronium

  Monitor Closely (3)pancuronium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  pancuronium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of pancuronium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• panobinostat

  Serious - Use Alternative (1)paliperidone 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.

• papaveretum

  Monitor Closely (1)papaveretum and paliperidone both increase sedation. Use Caution/Monitor.

• papaverine

  Monitor Closely (1)paliperidone and papaverine both increase sedation. Use Caution/Monitor.

• paroxetine

  Monitor Closely (2)paroxetine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).
  
  paliperidone and paroxetine both increase QTc interval. Use Caution/Monitor.

• pasireotide

  Monitor Closely (1)paliperidone and pasireotide both increase QTc interval. Modify Therapy/Monitor Closely.

• pazopanib

  Minor (1)paliperidone and pazopanib both increase QTc interval. Minor/Significance Unknown.

• pentamidine

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

• pentazocine

  Monitor Closely (1)pentazocine and paliperidone both increase sedation. Use Caution/Monitor.

• pentobarbital

  Monitor Closely (1)pentobarbital and paliperidone both increase sedation. Use Caution/Monitor.

• perphenazine

  Monitor Closely (3)perphenazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and perphenazine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and perphenazine both increase sedation. Use Caution/Monitor.

• phendimetrazine

  Monitor Closely (1)paliperidone increases and phendimetrazine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• phenelzine

  Monitor Closely (1)phenelzine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• phenobarbital

  Monitor Closely (2)phenobarbital will decrease the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  phenobarbital and paliperidone both increase sedation. Use Caution/Monitor.

• phentermine

  Monitor Closely (1)paliperidone increases and phentermine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• phenylephrine

  Monitor Closely (1)paliperidone increases and phenylephrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• phenylephrine PO

  Monitor Closely (1)paliperidone increases and phenylephrine PO decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. .

• phenytoin

  Monitor Closely (1)phenytoin will decrease the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• pholcodine

  Monitor Closely (1)paliperidone and pholcodine both increase sedation. Use Caution/Monitor.

• pimavanserin

  Serious - Use Alternative (1)paliperidone and pimavanserin both increase QTc interval. Avoid or Use Alternate Drug. Coadministration may increase the risk of QT prolongation and cardiac arrhythmia.

• pimozide

  Monitor Closely (2)paliperidone and pimozide both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and pimozide both increase sedation. Use Caution/Monitor.Serious - Use Alternative (1)paliperidone and pimozide both increase QTc interval. Avoid or Use Alternate Drug.

• pioglitazone

  Monitor Closely (1)paliperidone, pioglitazone. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• pirbuterol

  Monitor Closely (1)paliperidone increases and pirbuterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• pitolisant

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

• pomalidomide

  Serious - Use Alternative (1)paliperidone increases levels of pomalidomide by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

• posaconazole

  Monitor Closely (1)paliperidone and posaconazole both increase QTc interval. Use Caution/Monitor.

• pralidoxime

  Monitor Closely (3)pralidoxime decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  pralidoxime decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of pralidoxime by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• pramipexole

  Serious - Use Alternative (1)paliperidone decreases effects of pramipexole by pharmacodynamic antagonism. Contraindicated.

• pramlintide

  Monitor Closely (1)paliperidone, pramlintide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• primaquine

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

• primidone

  Monitor Closely (1)primidone and paliperidone both increase sedation. Use Caution/Monitor.

• procainamide

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

• procarbazine

  Monitor Closely (1)procarbazine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• prochlorperazine

  Monitor Closely (3)prochlorperazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and prochlorperazine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and prochlorperazine both increase sedation. Use Caution/Monitor.

• promazine

  Monitor Closely (1)promazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

• promethazine

  Monitor Closely (4)promethazine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).
  
  promethazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and promethazine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  promethazine and paliperidone both increase sedation. Use Caution/Monitor.

• propantheline

  Monitor Closely (3)propantheline decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  propantheline decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of propantheline by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• propofol

  Monitor Closely (1)propofol and paliperidone both increase sedation. Use Caution/Monitor.

• propylhexedrine

  Monitor Closely (1)paliperidone increases and propylhexedrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• protriptyline

  Monitor Closely (2)protriptyline and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and protriptyline both increase sedation. Use Caution/Monitor.

• quazepam

  Monitor Closely (1)quazepam and paliperidone both increase sedation. Use Caution/Monitor.

• quercetin

  Monitor Closely (1)quercetin will decrease the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• quetiapine

  Monitor Closely (3)paliperidone and quetiapine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and quetiapine both increase sedation. Use Caution/Monitor.
  
  quetiapine, paliperidone. 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.

• quinidine

  Serious - Use Alternative (2)quinidine and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.
  
  quinidine will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

• quinine

  Monitor Closely (1)paliperidone and quinine both increase QTc interval. Use Caution/Monitor.

• ramelteon

  Monitor Closely (1)paliperidone and ramelteon both increase sedation. Use Caution/Monitor.

• ranolazine

  Monitor Closely (2)ranolazine will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  paliperidone and ranolazine both increase QTc interval. Use Caution/Monitor.

• rapacuronium

  Monitor Closely (3)rapacuronium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  rapacuronium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of rapacuronium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• remimazolam

  Monitor Closely (1)remimazolam, paliperidone. Either increases toxicity of the other by sedation. Modify Therapy/Monitor Closely. Coadministration may result in profound sedation, respiratory depression, coma, and/or death. Continuously monitor vital signs during sedation and recovery period if coadministered. Carefully titrate remimazolam dose if administered with opioid analgesics and/or sedative/hypnotics.

• repaglinide

  Monitor Closely (1)paliperidone, repaglinide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• ribociclib

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

• rifampin

  Monitor Closely (1)rifampin will decrease the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Paliperidone dose may need to be increased when coadministered with strong inducers of both CYP3A4 and P-gp

• rifaximin

  Monitor Closely (1)paliperidone increases levels of rifaximin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• rilpivirine

  Monitor Closely (1)rilpivirine increases toxicity of paliperidone by QTc interval. Use Caution/Monitor. Rilpivirine should be used with caution when co-administered with a drug with a known risk of Torsade de Pointes.

• riociguat

  Serious - Use Alternative (1)paliperidone will increase the level or effect of riociguat by decreasing metabolism. Avoid or Use Alternate Drug. Coadministration of riociguat (substrate of CYP isoenzymes 1A1, 2C8, 3A, 2J2) with strong CYP inhibitors may require a decreased initial dose of 0.5 mg PO TID; monitor for signs of hypotension and reduce dose if needed

• risperidone

  Monitor Closely (4)paliperidone and risperidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and risperidone both increase QTc interval. Use Caution/Monitor.
  
  paliperidone and risperidone both increase sedation. Use Caution/Monitor.
  
  paliperidone, risperidone. Either increases effects of the other by pharmacodynamic synergism. Use Caution/Monitor. Paliperidone is the major active metabolite of risperidone, consideration should be given to the additive paliperidone exposure if any of these medications are coadministered.

• ritonavir

  Monitor Closely (1)ritonavir will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• rocuronium

  Monitor Closely (3)rocuronium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  rocuronium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of rocuronium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• romidepsin

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

• ropinirole

  Serious - Use Alternative (1)paliperidone decreases effects of ropinirole by pharmacodynamic antagonism. Contraindicated.

• rosiglitazone

  Monitor Closely (1)paliperidone, rosiglitazone. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• safinamide

  Serious - Use Alternative (1)paliperidone decreases effects of safinamide by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Dopamine antagonists may decrease safinamide effects and exacerbate Parkinson disease symptoms.

• sage

  Minor (1)paliperidone and sage both increase sedation. Minor/Significance Unknown.

• salmeterol

  Monitor Closely (1)paliperidone increases and salmeterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• saquinavir

  Serious - Use Alternative (1)saquinavir, paliperidone. Either increases toxicity of the other by QTc interval. Avoid or Use Alternate Drug. Increased risk of QT prolongation and cardiac arrhythmias.

• sarecycline

  Monitor Closely (1)sarecycline will increase the level or effect of paliperidone 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

  Monitor Closely (1)paliperidone, saxagliptin. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• scopolamine

  Monitor Closely (3)scopolamine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  scopolamine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of scopolamine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• scullcap

  Monitor Closely (1)paliperidone and scullcap both increase sedation. Use Caution/Monitor.

• secobarbital

  Monitor Closely (1)secobarbital and paliperidone both increase sedation. Use Caution/Monitor.

• selegiline

  Monitor Closely (1)selegiline, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• selinexor

  Serious - Use Alternative (1)selinexor, paliperidone. 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 paliperidone by QTc interval. Use Caution/Monitor.

• sertraline

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

• sevoflurane

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

• shepherd's purse

  Monitor Closely (1)paliperidone and shepherd's purse both increase sedation. Use Caution/Monitor.

• simvastatin

  Monitor Closely (1)simvastatin will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• siponimod

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

• sirolimus

  Monitor Closely (1)sirolimus will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• sitagliptin

  Monitor Closely (1)paliperidone, sitagliptin. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• sodium oxybate

  Serious - Use Alternative (1)paliperidone, sodium oxybate. Either increases effects of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Profound sedation, respiratory depression, coma, and death may result if coadministered. Reserve concomitant prescribing of these drugs in patients for whom other treatment options are inadequate. Limit dosages and durations to the minimum required. Monitor closely for signs of respiratory depression and sedation.

• sodium sulfate/?magnesium sulfate/potassium chloride

  Monitor Closely (2)sodium sulfate/?magnesium sulfate/potassium chloride increases toxicity of paliperidone by QTc interval. Use Caution/Monitor. Consider predose and post-colonoscopy ECGs in patients at increased risk of serious cardiac arrhythmias. .
  
  sodium sulfate/?magnesium sulfate/potassium chloride increases effects of paliperidone by unknown mechanism. Use Caution/Monitor. Closely monitor for evidence of enhanced CNS depression when using higher dose of magnesium sulfate together with a CNS depressant.

• sodium sulfate/potassium sulfate/magnesium sulfate

  Monitor Closely (2)sodium sulfate/potassium sulfate/magnesium sulfate increases toxicity of paliperidone by QTc interval. Use Caution/Monitor. Consider predose and post-colonoscopy ECGs in patients at increased risk of serious cardiac arrhythmias. .
  
  sodium sulfate/potassium sulfate/magnesium sulfate increases effects of paliperidone by unknown mechanism. Use Caution/Monitor. Closely monitor for evidence of enhanced CNS depression when using higher dose of magnesium sulfate together with a CNS depressant.

• solifenacin

  Monitor Closely (3)solifenacin decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  solifenacin decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of solifenacin by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.Serious - Use Alternative (1)solifenacin and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• sorafenib

  Monitor Closely (1)sorafenib and paliperidone both increase QTc interval. Use Caution/Monitor.

• sotalol

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

• sotorasib

  Serious - Use Alternative (1)sotorasib will decrease the level or effect of paliperidone 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.

• St John's Wort

  Monitor Closely (1)St John's Wort will decrease the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Paliperidone dose may need to be increased when coadministered with strong inducers of both CYP3A4 and P-gp

• stiripentol

  Monitor Closely (2)stiripentol, paliperidone. Either increases effects of the other by sedation. Use Caution/Monitor. Concomitant use stiripentol with other CNS depressants, including alcohol, may increase the risk of sedation and somnolence.
  
  stiripentol will increase the level or effect of paliperidone 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.

• sufentanil

  Monitor Closely (1)sufentanil and paliperidone both increase sedation. Use Caution/Monitor.

• sufentanil SL

  Serious - Use Alternative (1)sufentanil SL, paliperidone. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Coadministration may result in hypotension, profound sedation, respiratory depression, coma, and death. Reserve concomitant prescribing of these drugs in patients for whom other treatment options are inadequate. Limit dosages and durations to the minimum required. Monitor closely for signs of respiratory depression and sedation.

• sulfamethoxazole

  Monitor Closely (1)sulfamethoxazole and paliperidone both increase QTc interval. Use Caution/Monitor.

• sumatriptan

  Monitor Closely (1)sumatriptan, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• sumatriptan intranasal

  Monitor Closely (1)sumatriptan intranasal, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• sunitinib

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

• tacrolimus

  Monitor Closely (1)tacrolimus will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.Serious - Use Alternative (1)tacrolimus and paliperidone both increase QTc interval. Avoid or Use Alternate Drug.

• tapentadol

  Monitor Closely (1)tapentadol and paliperidone both increase sedation. Use Caution/Monitor.

• telavancin

  Monitor Closely (1)paliperidone and telavancin both increase QTc interval. Use Caution/Monitor.

• temazepam

  Monitor Closely (1)temazepam and paliperidone both increase sedation. Use Caution/Monitor.

• tepotinib

  Serious - Use Alternative (1)tepotinib will increase the level or effect of paliperidone 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.

• terbutaline

  Monitor Closely (1)paliperidone increases and terbutaline decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• tetrabenazine

  Monitor Closely (1)paliperidone and tetrabenazine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Modify Therapy/Monitor Closely.

• thioridazine

  Monitor Closely (3)thioridazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and thioridazine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and thioridazine both increase sedation. Use Caution/Monitor.

• thiothixene

  Monitor Closely (2)paliperidone and thiothixene both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and thiothixene both increase sedation. Use Caution/Monitor.

• tiotropium

  Monitor Closely (3)tiotropium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  tiotropium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of tiotropium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• tolazamide

  Monitor Closely (1)paliperidone, tolazamide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• tolbutamide

  Monitor Closely (1)paliperidone, tolbutamide. Other (see comment). Use Caution/Monitor. Comment: Atypical antipsychotics have been associated with hyperglycemia that may alter blood glucose control; monitor glucose levels closely.

• tolterodine

  Monitor Closely (3)tolterodine decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  tolterodine decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of tolterodine by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• tolvaptan

  Monitor Closely (1)tolvaptan will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• topiramate

  Monitor Closely (1)paliperidone and topiramate both increase sedation. Modify Therapy/Monitor Closely.

• tramadol

  Monitor Closely (1)tramadol and paliperidone both increase sedation. Use Caution/Monitor.

• tranylcypromine

  Monitor Closely (1)tranylcypromine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• trazodone

  Monitor Closely (3)trazodone will decrease the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.
  
  trazodone and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and trazodone both increase sedation. Use Caution/Monitor.

• triazolam

  Monitor Closely (1)triazolam and paliperidone both increase sedation. Use Caution/Monitor.

• triclabendazole

  Monitor Closely (1)triclabendazole and paliperidone both increase QTc interval. Use Caution/Monitor.

• triclofos

  Monitor Closely (1)triclofos and paliperidone both increase sedation. Use Caution/Monitor.

• trifluoperazine

  Monitor Closely (3)trifluoperazine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and trifluoperazine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and trifluoperazine both increase sedation. Use Caution/Monitor.

• trimethoprim

  Monitor Closely (1)paliperidone and trimethoprim both increase QTc interval. Use Caution/Monitor.

• trimipramine

  Monitor Closely (2)trimipramine and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and trimipramine both increase sedation. Use Caution/Monitor.

• triprolidine

  Monitor Closely (1)triprolidine and paliperidone both increase sedation. Use Caution/Monitor.

• triptorelin

  Serious - Use Alternative (1)triptorelin increases toxicity of paliperidone by QTc interval. Avoid or Use Alternate Drug. Increases risk of torsades de pointes.

• tropisetron

  Monitor Closely (1)paliperidone and tropisetron both increase QTc interval. Use Caution/Monitor.

• trospium chloride

  Monitor Closely (3)trospium chloride decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  trospium chloride decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of trospium chloride by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• tucatinib

  Monitor Closely (1)tucatinib will increase the level or effect of paliperidone 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.

• umeclidinium bromide/vilanterol inhaled

  Serious - Use Alternative (1)paliperidone 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 paliperidone both increase QTc interval. Use Caution/Monitor.

• vandetanib

  Serious - Use Alternative (1)paliperidone, 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.

• vecuronium

  Monitor Closely (3)vecuronium decreases levels of paliperidone by inhibition of GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.
  
  vecuronium decreases levels of paliperidone by pharmacodynamic antagonism. Use Caution/Monitor.
  
  paliperidone increases effects of vecuronium by pharmacodynamic synergism. Use Caution/Monitor. Additive anticholinergic effects, possible hypoglycemia.

• vemurafenib

  Serious - Use Alternative (1)vemurafenib and paliperidone 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)paliperidone will increase the level or effect of venetoclax by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If a P-gp inhibitor must be used, reduce the venetoclax dose by at least 50%. Monitor more closely for signs of venetoclax toxicities.

• venlafaxine

  Monitor Closely (2)venlafaxine, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).
  
  paliperidone and venlafaxine both increase QTc interval. Use Caution/Monitor.

• verapamil

  Monitor Closely (1)verapamil will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

• vilanterol/fluticasone furoate inhaled

  Serious - Use Alternative (1)paliperidone 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.

• vilazodone

  Monitor Closely (1)vilazodone, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• voclosporin

  Monitor Closely (1)voclosporin, paliperidone. Either increases effects of the other by QTc interval. Use Caution/Monitor.

• voriconazole

  Monitor Closely (1)paliperidone and voriconazole both increase QTc interval. Use Caution/Monitor.

• vorinostat

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

• xylometazoline

  Monitor Closely (1)paliperidone increases and xylometazoline decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• yohimbine

  Monitor Closely (1)paliperidone increases and yohimbine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.

• ziconotide

  Monitor Closely (1)paliperidone and ziconotide both increase sedation. Use Caution/Monitor.

• ziprasidone

  Monitor Closely (3)paliperidone and ziprasidone both increase QTc interval. Modify Therapy/Monitor Closely.
  
  paliperidone and ziprasidone both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and ziprasidone both increase sedation. Use Caution/Monitor.

• zolmitriptan

  Monitor Closely (1)zolmitriptan, paliperidone. unspecified interaction mechanism. Use Caution/Monitor. Serotonin modulators may enhance dopamine blockade, possibly increasing the risk for neuroleptic malignant syndrome. Antipsychotics may enhance serotonergic effect of serotonin modulators, which may result in serotonin syndrome. Monitor for evidence of serotonin toxicity (eg, mental status changes, autonomic instability, and neuromuscular hyperactivity) or neuroleptic malignant syndrome (eg, hyperthermia, muscle rigidity, autonomic dysfunction).

• zotepine

  Monitor Closely (2)paliperidone and zotepine both increase antidopaminergic effects, including extrapyramidal symptoms and neuroleptic malignant syndrome. Use Caution/Monitor.
  
  paliperidone and zotepine both increase sedation. Use Caution/Monitor.