Dosing & Uses
Dosage Forms & Strengths
codeine/aspirin/carisoprodol
tablet: Schedule III
- 16mg/325mg/200mg
Musculoskeletal Pain
1-2 tab/cap PO QID for up to 2-3 weeks
Dosage Forms & Strengths
codeine/aspirin/carisoprodol
tablet: Schedule III
- 16mg/325mg/200mg
Musculoskeletal Pain
<16 years: Safety & efficacy not established
16 years or older: As adults; 1-2 tab/cap PO QID for up to 2-3 weeks
Interactions
Interaction Checker
No Results

Contraindicated
Serious - Use Alternative
Significant - Monitor Closely
Minor

Contraindicated (3)
- abrocitinib
abrocitinib and aspirin both increase anticoagulation. Contraindicated. Antiplatelet drugs, except for low-dose aspirin (=81 mg qDay), during the first 3 months of treatment are contraindicated.
- alvimopan
alvimopan, codeine. receptor binding competition. Contraindicated. Alvimopan is contraindicated in opioid tolerant patients (ie, those who have taken therapeutic doses of opioids for >7 consecutive days immediately prior to taking alvimopan). Patients recently exposed to opioids are expected to be more sensitive to the effects of alvimopan and therefore may experience abdominal pain, nausea and vomiting, and diarrhea. No significant interaction is expected with concurrent use of opioid analgesics and alvimopan in patients who received opioid analgesics for 7 or fewer consecutive days prior to alvimopan.
- dichlorphenamide
dichlorphenamide increases levels of aspirin by unknown mechanism. Contraindicated. Coadministration of dichlorphenamide with high-dose aspirin may increase salicylate levels. Anorexia, tachypnea, lethargy, and coma reported.
Serious - Use Alternative (77)
- acrivastine
acrivastine and codeine both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
- amisulpride
amisulpride and codeine both increase sedation. Avoid or Use Alternate Drug.
- apalutamide
apalutamide will decrease the level or effect of carisoprodol by affecting hepatic enzyme CYP2C19 metabolism. Avoid or Use Alternate Drug. Coadministration of apalutamide, a strong CYP2C19 inducer, with drugs that are CYP2C19 substrates can result in lower exposure to these medications. Avoid or substitute another drug for these medications when possible. Evaluate for loss of therapeutic effect if medication must be coadministered.
- asenapine
asenapine and codeine both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
- asenapine transdermal
asenapine transdermal and codeine both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
- avapritinib
avapritinib and codeine both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
- benazepril
aspirin, benazepril. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Coadministration may result in a significant decrease in renal function. NSAIDs may diminish the antihypertensive effect of ACE inhibitors. The mechanism of these interactions is likely related to the ability of NSAIDs to reduce the synthesis of vasodilating renal prostaglandins.
- benzhydrocodone/acetaminophen
benzhydrocodone/acetaminophen and codeine both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
benzhydrocodone/acetaminophen, codeine. 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.
benzhydrocodone/acetaminophen and carisoprodol both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
benzhydrocodone/acetaminophen, carisoprodol. 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. - bremelanotide
bremelanotide will decrease the level or effect of codeine by Other (see comment). Avoid or Use Alternate Drug. Bremelanotide may slow gastric emptying and potentially reduces the rate and extent of absorption of concomitantly administered oral medications. Avoid use when taking any oral drug that is dependent on threshold concentrations for efficacy. Interactions listed are representative examples and do not include all possible clinical examples.
- buprenorphine subdermal implant
buprenorphine subdermal implant and carisoprodol both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
- brimonidine
brimonidine and codeine both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
- buprenorphine
buprenorphine, codeine. Other (see comment). Avoid or Use Alternate Drug. Comment: Mixed opiate agonist/antagonists usually produce additive sedation with narcotics; however, in narcotic addicted pts., the antagonist activity may provoke withdrawal Sx.
- buprenorphine buccal
buprenorphine buccal, codeine. Other (see comment). Avoid or Use Alternate Drug. Comment: Mixed opiate agonist/antagonists usually produce additive sedation with narcotics; however, in narcotic addicted pts., the antagonist activity may provoke withdrawal Sx.
- buprenorphine subdermal implant
buprenorphine subdermal implant and codeine both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
- buprenorphine transdermal
buprenorphine transdermal and codeine both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
buprenorphine transdermal and carisoprodol both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate - buprenorphine, long-acting injection
buprenorphine, long-acting injection and codeine both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
buprenorphine, long-acting injection and carisoprodol both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate - butorphanol
butorphanol, codeine. Other (see comment). Avoid or Use Alternate Drug. Comment: Mixed opiate agonist/antagonists usually produce additive sedation with narcotics; however, in narcotic addicted pts., the antagonist activity may provoke withdrawal Sx.
- calcium/magnesium/potassium/sodium oxybates
carisoprodol, 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.
- calcium/magnesium/potassium/sodium oxybates
codeine, 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.
- caplacizumab
caplacizumab, aspirin. Either increases effects of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug.
- captopril
aspirin, captopril. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Coadministration may result in a significant decrease in renal function. NSAIDs may diminish the antihypertensive effect of ACE inhibitors. The mechanism of these interactions is likely related to the ability of NSAIDs to reduce the synthesis of vasodilating renal prostaglandins.
- clonidine
clonidine, codeine. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Coadministration enhances CNS depressant effects.
- dacomitinib
dacomitinib will increase the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Avoid or Use Alternate Drug. Avoid use with CYP2D6 substrates where minimal increases in concentration of the CYP2D6 substrate may lead to serious or life-threatening toxicities.
- diazepam intranasal
diazepam intranasal, codeine. 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.
- eluxadoline
codeine, eluxadoline. Either increases effects of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Avoid coadministration with other drugs that cause constipation. Increases risk for constipation related serious adverse reactions. .
- enalapril
aspirin, enalapril. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Coadministration may result in a significant decrease in renal function. NSAIDs may diminish the antihypertensive effect of ACE inhibitors. The mechanism of these interactions is likely related to the ability of NSAIDs to reduce the synthesis of vasodilating renal prostaglandins.
- fentanyl
fentanyl and codeine both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
fentanyl, codeine. Either increases effects of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Coadministration with other CNS depressants, such as skeletal muscle relaxants, may cause respiratory depression, hypotension, profound sedation, coma, and/or death. Consider dose reduction of either or both agents to avoid serious adverse effects. Monitor for hypotension, respiratory depression, and profound sedation.
fentanyl and carisoprodol both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate - fentanyl intranasal
fentanyl intranasal and carisoprodol both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
fentanyl intranasal, codeine. Either increases effects of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Coadministration with other CNS depressants, such as skeletal muscle relaxants, may cause respiratory depression, hypotension, profound sedation, coma, and/or death. Consider dose reduction of either or both agents to avoid serious adverse effects. Monitor for hypotension, respiratory depression, and profound sedation.
fentanyl intranasal and codeine both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate - fentanyl iontophoretic transdermal system
fentanyl iontophoretic transdermal system and carisoprodol both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
fentanyl iontophoretic transdermal system and codeine both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate - fentanyl transdermal
fentanyl transdermal and carisoprodol both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
fentanyl transdermal and codeine both increase sedation. Avoid or Use Alternate Drug. Limit use to patients for whom alternative treatment options are inadequate
fentanyl transdermal, codeine. Either increases effects of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Coadministration with other CNS depressants, such as skeletal muscle relaxants, may cause respiratory depression, hypotension, profound sedation, coma, and/or death. Consider dose reduction of either or both agents to avoid serious adverse effects. Monitor for hypotension, respiratory depression, and profound sedation. - fentanyl transmucosal
fentanyl transmucosal, codeine. Either increases effects of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Coadministration with other CNS depressants, such as skeletal muscle relaxants, may cause respiratory depression, hypotension, profound sedation, coma, and/or death. Consider dose reduction of either or both agents to avoid serious adverse effects. Monitor for hypotension, respiratory depression, and profound sedation.
- fosinopril
aspirin, fosinopril. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Coadministration may result in a significant decrease in renal function. NSAIDs may diminish the antihypertensive effect of ACE inhibitors. The mechanism of these interactions is likely related to the ability of NSAIDs to reduce the synthesis of vasodilating renal prostaglandins.
- hydrocodone
hydrocodone, carisoprodol. 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.
- givosiran
givosiran will increase the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of sensitive CYP2D6 substrates with givosiran. If unavoidable, decrease the CYP2D6 substrate dosage in accordance with approved product labeling.
- hydrocodone
hydrocodone, codeine. 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.
- ibuprofen
ibuprofen decreases effects of aspirin by Other (see comment). Avoid or Use Alternate Drug. Comment: Ibuprofen decreases the antiplatelet effects of low-dose aspirin by blocking the active site of platelet cyclooxygenase. Administer ibuprofen 8 h before aspirin or at least 2-4 h after aspirin. The effect of other NSAIDs on aspirin is not established.
ibuprofen increases toxicity of aspirin by anticoagulation. Avoid or Use Alternate Drug. increases risk of bleeding. - ibuprofen IV
ibuprofen IV increases toxicity of aspirin by anticoagulation. Avoid or Use Alternate Drug. increases risk of bleeding.
ibuprofen IV decreases effects of aspirin by Other (see comment). Avoid or Use Alternate Drug. Comment: Ibuprofen decreases the antiplatelet effects of low-dose aspirin by blocking the active site of platelet cyclooxygenase. Administer ibuprofen 8 h before aspirin or at least 2-4 h after aspirin. The effect of other NSAIDs on aspirin is not established. - isocarboxazid
isocarboxazid increases toxicity of codeine by unknown mechanism. Avoid or Use Alternate Drug. Risk of hypotension, hyperpyrexia, somnolence, or death; separate by 14 d.
- ketorolac
aspirin, ketorolac. Either increases toxicity of the other by pharmacodynamic synergism. Contraindicated.
- ketorolac intranasal
aspirin, ketorolac intranasal. Either increases toxicity of the other by pharmacodynamic synergism. Contraindicated.
- lesinurad
aspirin decreases effects of lesinurad by unspecified interaction mechanism. Avoid or Use Alternate Drug. Aspirin at doses >325 mg/day may decrease lesinurad efficacy. Aspirin doses 325 mg/day or less (ie, for cardiovascular event prophylaxis) does not decrease lesinurad efficacy and can be coadministered.
- linezolid
linezolid increases toxicity of codeine by unknown mechanism. Avoid or Use Alternate Drug. Risk of hypotension, hyperpyrexia, somnolence, or death; separate by 14 d.
- lisinopril
aspirin, lisinopril. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Coadministration may result in a significant decrease in renal function. NSAIDs may diminish the antihypertensive effect of ACE inhibitors. The mechanism of these interactions is likely related to the ability of NSAIDs to reduce the synthesis of vasodilating renal prostaglandins.
- lonafarnib
lonafarnib will increase the level or effect of carisoprodol by affecting hepatic enzyme CYP2C19 metabolism. Avoid or Use Alternate Drug. Lonafarnib may increase the AUC and peak concentration of CYP2C19 substrates. If coadministration unavoidable, monitor for adverse reactions and reduce the CYP2C19 substrate dose in accordance with its approved product labeling.
- macimorelin
aspirin, macimorelin. unspecified interaction mechanism. Avoid or Use Alternate Drug. Drugs that directly affect the pituitary secretion of growth hormone (GH) may impact the accuracy of the macimorelin diagnostic test. Allow sufficient washout time of drugs affecting GH release before administering macimorelin. .
- measles, mumps, rubella and varicella vaccine, live
aspirin, measles, mumps, rubella and varicella vaccine, live. Mechanism: unspecified interaction mechanism. Avoid or Use Alternate Drug. Risk of Reye's Syndrome with combination; avoid salicylate use for 6 wks after vaccination.
- methotrexate
aspirin increases levels of methotrexate by decreasing renal clearance. Avoid or Use Alternate Drug. Caution should be exercised when salicylates are given in combination with methotrexate. Risk for drug interactions with methotrexate is greatest during high-dose methotrexate therapy, it has been recommended that any of these drugs be used cautiously with methotrexate even when methotrexate is used in low doses.
- methylene blue
methylene blue and codeine both increase serotonin levels. Avoid or Use Alternate Drug. If drug combination must be administered, monitor for evidence of serotonergic or opioid-related toxicities
- metoclopramide intranasal
codeine, 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.
carisoprodol, 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. - mifepristone
aspirin will decrease the level or effect of mifepristone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- mitotane
aspirin will decrease the level or effect of mitotane by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.
- moexipril
aspirin, moexipril. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Coadministration may result in a significant decrease in renal function. NSAIDs may diminish the antihypertensive effect of ACE inhibitors. The mechanism of these interactions is likely related to the ability of NSAIDs to reduce the synthesis of vasodilating renal prostaglandins.
- nalbuphine
nalbuphine, codeine. Other (see comment). Avoid or Use Alternate Drug. Comment: Mixed opiate agonist/antagonists usually produce additive sedation with narcotics; however, in narcotic addicted pts., the antagonist activity may provoke withdrawal Sx.
- olopatadine intranasal
carisoprodol 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.
- olopatadine intranasal
codeine 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.
- ozanimod
ozanimod and codeine both increase sympathetic (adrenergic) effects, including increased blood pressure and heart rate. Avoid or Use Alternate Drug. Because the active metabolite of ozanimod inhibits MAO-B in vitro, there is a potential for serious adverse reactions, including hypertensive crisis. Therefore, coadministration of ozanimod with drugs that can increase norepinephrine or serotonin is not recommended. Monitor for hypertension with concomitant use.
- pemetrexed
aspirin increases levels of pemetrexed by unspecified interaction mechanism. Avoid or Use Alternate Drug. Interrupt dosing in all patients taking NSAIDs with long elimination half-lives for at least 5d before, the day of, and 2d following pemetrexed administration. If coadministration of an NSAID is necessary, closely monitor patients for toxicity, especially myelosuppression, renal toxicity, and GI toxicity.
- pentazocine
pentazocine, codeine. Other (see comment). Avoid or Use Alternate Drug. Comment: Mixed opiate agonist/antagonists usually produce additive sedation with narcotics; however, in narcotic addicted pts., the antagonist activity may provoke withdrawal Sx.
- perindopril
aspirin, perindopril. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Coadministration may result in a significant decrease in renal function. NSAIDs may diminish the antihypertensive effect of ACE inhibitors. The mechanism of these interactions is likely related to the ability of NSAIDs to reduce the synthesis of vasodilating renal prostaglandins.
- phenelzine
phenelzine increases toxicity of codeine by unknown mechanism. Avoid or Use Alternate Drug. Risk of hypotension, hyperpyrexia, somnolence, or death; separate by 14 d.
- prasugrel
codeine will decrease the level or effect of prasugrel by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Co-administration of opioid agonists delay and reduce absorption of prasugrel and its active metabolite presumably by slowing gastric emptying; consider the use of a parenteral anti-platelet agent in acute coronary syndrome patients requiring co-administration of opioid agonists
- probenecid
aspirin decreases effects of probenecid by acidic (anionic) drug competition for renal tubular clearance. Avoid or Use Alternate Drug. Aspirin decreases uricosuric action of probenecid.
- procarbazine
procarbazine increases toxicity of codeine by unknown mechanism. Avoid or Use Alternate Drug. MAOIs may potentiate CNS depression and hypotension. Do not use within 14 days of MAOI use. .
- quinapril
aspirin, quinapril. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Coadministration may result in a significant decrease in renal function. NSAIDs may diminish the antihypertensive effect of ACE inhibitors. The mechanism of these interactions is likely related to the ability of NSAIDs to reduce the synthesis of vasodilating renal prostaglandins.
- ramipril
aspirin, ramipril. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Coadministration may result in a significant decrease in renal function. NSAIDs may diminish the antihypertensive effect of ACE inhibitors. The mechanism of these interactions is likely related to the ability of NSAIDs to reduce the synthesis of vasodilating renal prostaglandins.
- rasagiline
rasagiline increases toxicity of codeine by unknown mechanism. Avoid or Use Alternate Drug. Risk of hypotension, hyperpyrexia, somnolence, or death.
- selegiline transdermal
selegiline transdermal increases toxicity of codeine by unknown mechanism. Avoid or Use Alternate Drug. Risk of hypotension, hyperpyrexia, somnolence, or death.
- selinexor
selinexor, codeine. 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.
selinexor, carisoprodol. 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. - sodium oxybate
codeine, 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.
carisoprodol, 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. - sufentanil SL
sufentanil SL, codeine. 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.
sufentanil SL, carisoprodol. 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. - ticagrelor
codeine will decrease the level or effect of ticagrelor by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Co-administration of opioid agonists delay and reduce absorption of ticagrelor and its active metabolite presumably by slowing gastric emptying; consider the use of a parenteral anti-platelet agent in acute coronary syndrome patients requiring co-administration of opioid agonists
- ticlopidine
aspirin increases effects of ticlopidine by pharmacodynamic synergism. Avoid or Use Alternate Drug. Enhanced risk of hemorrhage.
- tramadol
tramadol, codeine. Other (see comment). Avoid or Use Alternate Drug. Comment: Tramadol may reinitiate opiate dependence in pts. previously addicted to other opiates; it may also provoke withdrawal Sx. in pts. who are currently opiate dependent.
- trandolapril
aspirin, trandolapril. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Coadministration may result in a significant decrease in renal function. NSAIDs may diminish the antihypertensive effect of ACE inhibitors. The mechanism of these interactions is likely related to the ability of NSAIDs to reduce the synthesis of vasodilating renal prostaglandins.
- tranylcypromine
tranylcypromine increases toxicity of codeine by unknown mechanism. Avoid or Use Alternate Drug. Risk of hypotension, hyperpyrexia, somnolence, or death; separate by 14 d.
- valerian
valerian and codeine both increase sedation. Avoid or Use Alternate Drug.
- varicella virus vaccine live
aspirin, varicella virus vaccine live. Mechanism: unspecified interaction mechanism. Avoid or Use Alternate Drug. Risk of Reye's Syndrome with combination; avoid salicylate use for 6 wks after vaccination.
Monitor Closely (524)
- abciximab
aspirin, abciximab. Either increases toxicity of the other by anticoagulation. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely.
- abiraterone
abiraterone increases levels of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Avoid coadministration of abiraterone with substrates of CYP2D6. If alternative therapy cannot be used, exercise caution and consider a dose reduction of the CYP2D6 substrate.
- abobotulinumtoxinA
carisoprodol increases effects of abobotulinumtoxinA by pharmacodynamic synergism. Use Caution/Monitor. Muscle relaxants may enhance botulinum toxin effects. Closely monitor for increased neuromuscular blockade.
- acalabrutinib
acalabrutinib increases effects of aspirin by anticoagulation. Modify Therapy/Monitor Closely. Coadministration of acalabrutinib with antiplatelets or anticoagulants may further increase risk of hemorrhage. Monitor for signs of bleeding and consider the benefit-risk of withholding acalabrutinib for 3-7 days presurgery and postsurgery depending upon the type of surgery and the risk of bleeding.
- acebutolol
acebutolol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of acebutolol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - aceclofenac
aceclofenac and aspirin both increase anticoagulation. Use Caution/Monitor.
aceclofenac and aspirin both increase serum potassium. Use Caution/Monitor. - acemetacin
acemetacin and aspirin both increase anticoagulation. Use Caution/Monitor.
acemetacin and aspirin both increase serum potassium. Use Caution/Monitor. - acetazolamide
acetazolamide, aspirin. Either increases levels of the other by Other (see comment). Use Caution/Monitor. Comment: Carbonic anhydrase inhibitors (CAIs) and salicylates inhibit each other's renal tubular secretion, resulting in increased plasma levels. CAIs also shift salicylates from plasma to the CNS, leading to potential neurotoxicity.
acetazolamide, aspirin. Mechanism: passive renal tubular reabsorption due to increased pH. Use Caution/Monitor. Salicylate levels increased at moderate doses; risk of CNS toxicity. Salicylate levels decreased at large doses (d/t increased renal excretion of unchanged salicylic acid). - acrivastine
acrivastine and carisoprodol both increase sedation. Use Caution/Monitor.
- agrimony
aspirin and agrimony both increase anticoagulation. Use Caution/Monitor.
- albuterol
codeine increases and albuterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
aspirin increases and albuterol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor. - alfalfa
aspirin and alfalfa both increase anticoagulation. Use Caution/Monitor.
- alfentanil
carisoprodol and alfentanil both increase sedation. Use Caution/Monitor.
alfentanil and codeine both increase sedation. Use Caution/Monitor. - alfuzosin
aspirin decreases effects of alfuzosin by pharmacodynamic antagonism. Use Caution/Monitor. NSAIDs decrease prostaglandin synthesis.
- aliskiren
aspirin will decrease the level or effect of aliskiren by Other (see comment). Use Caution/Monitor. In patients who are elderly, volume-depleted (including those on diuretic therapy), or with compromised renal function, coadministration of NSAIDs with drugs that affect RAAS may increase the risk of renal impairment (including acute renal failure) and cause loss of antihypertensive effect. Monitor renal function periodically.
- alprazolam
alprazolam and codeine both increase sedation. Use Caution/Monitor.
alprazolam and carisoprodol both increase sedation. Use Caution/Monitor. - alteplase
aspirin, alteplase. Either increases toxicity of the other by anticoagulation. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely.
- American ginseng
aspirin and American ginseng both increase anticoagulation. Use Caution/Monitor.
- amiloride
amiloride and aspirin both increase serum potassium. Modify Therapy/Monitor Closely.
- amiodarone
amiodarone will increase the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- amisulpride
amisulpride and carisoprodol both increase sedation. Use Caution/Monitor.
- amitriptyline
carisoprodol and amitriptyline both increase sedation. Use Caution/Monitor.
codeine and amitriptyline both increase sedation. Use Caution/Monitor. - amobarbital
amobarbital and codeine both increase sedation. Use Caution/Monitor.
amobarbital and carisoprodol both increase sedation. Use Caution/Monitor. - amoxapine
codeine and amoxapine both increase sedation. Use Caution/Monitor.
carisoprodol and amoxapine both increase sedation. Use Caution/Monitor. - amoxicillin
amoxicillin, aspirin. Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.
amoxicillin, aspirin. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor. - ampicillin
ampicillin, aspirin. Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.
- anagrelide
aspirin, anagrelide. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; increases risk of bleeding; monitor closely.
anagrelide, aspirin. Either increases toxicity of the other by Mechanism: pharmacodynamic synergism. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; increases risk of bleeding; monitor closely. - antithrombin alfa
antithrombin alfa and aspirin both increase anticoagulation. Modify Therapy/Monitor Closely.
aspirin, antithrombin alfa. Either increases toxicity of the other by anticoagulation. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely. - antithrombin III
antithrombin III and aspirin both increase anticoagulation. Modify Therapy/Monitor Closely.
aspirin, antithrombin III. Either increases toxicity of the other by anticoagulation. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely. - apixaban
aspirin and apixaban both increase anticoagulation. Modify Therapy/Monitor Closely. Both drugs have the potential to cause bleeding. The need for simultaneous use of low-dose aspirin (<100 mg/day) with anticoagulants are common for patients with cardiovascular disease, but may result in increased bleeding; monitor closely. Promptly evaluate any signs or symptoms of blood loss if treated concomitantly with low-dose aspiriin. Avoid coadministration with chronic use of higher dose aspirin. In 1 trial (APPRAISE-2), therapy was terminated because of significantly increased bleeding when apixaban was administered with dual antiplatelet therapy (eg, aspirin plus clopidogrel) compared with single antiplatelet treatment
- apomorphine
codeine and apomorphine both increase sedation. Use Caution/Monitor.
carisoprodol and apomorphine both increase sedation. Use Caution/Monitor. - arformoterol
codeine increases and arformoterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
aspirin increases and arformoterol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor. - argatroban
argatroban and aspirin both increase anticoagulation. Modify Therapy/Monitor Closely.
aspirin, argatroban. Either increases toxicity of the other by anticoagulation. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely. - aripiprazole
codeine and aripiprazole both increase sedation. Use Caution/Monitor.
carisoprodol and aripiprazole both increase sedation. Use Caution/Monitor. - armodafinil
codeine increases and armodafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- asenapine
aspirin decreases effects of asenapine by pharmacodynamic antagonism. Use Caution/Monitor. NSAIDs decrease prostaglandin synthesis.
- artemether/lumefantrine
artemether/lumefantrine will increase the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor.
- asenapine
asenapine and carisoprodol both increase sedation. Use Caution/Monitor.
- asenapine transdermal
asenapine transdermal and carisoprodol both increase sedation. Use Caution/Monitor.
- atenolol
atenolol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of atenolol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - avapritinib
avapritinib and carisoprodol both increase sedation. Use Caution/Monitor.
- azelastine
azelastine and carisoprodol both increase sedation. Use Caution/Monitor.
azelastine and codeine both increase sedation. Use Caution/Monitor. - azficel-T
azficel-T, aspirin. Other (see comment). Use Caution/Monitor. Comment: Patients taking aspirin may experience increased bruising or bleeding at biopsy and/or injection sites. Concomitant use of aspirin is not recommended. .
- azilsartan
aspirin, azilsartan. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly in elderly or volume depleted individuals.
aspirin decreases effects of azilsartan by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. NSAIDs decrease synthesis of vasodilating renal prostaglandins, and thus affect fluid homeostasis and may diminish antihypertensive effect. - baclofen
baclofen and carisoprodol both increase sedation. Use Caution/Monitor.
baclofen and codeine both increase sedation. Use Caution/Monitor. - belladonna and opium
codeine and belladonna and opium both increase sedation. Use Caution/Monitor.
carisoprodol and belladonna and opium both increase sedation. Use Caution/Monitor. - bemiparin
bemiparin and aspirin both increase anticoagulation. Modify Therapy/Monitor Closely.
- benazepril
benazepril, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly with high dose aspirin, in elderly or volume depleted individuals.
- bendroflumethiazide
aspirin increases and bendroflumethiazide decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- benperidol
codeine and benperidol both increase sedation. Use Caution/Monitor.
carisoprodol and benperidol both increase sedation. Use Caution/Monitor. - benzphetamine
codeine increases and benzphetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
carisoprodol increases and benzphetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. - betaxolol
betaxolol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of betaxolol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - betrixaban
aspirin, betrixaban. Either increases levels of the other by anticoagulation. Use Caution/Monitor.
- bimatoprost
bimatoprost, aspirin. unspecified interaction mechanism. Use Caution/Monitor. There are conflicting reports from studies of either increased or decreased IOP when ophthalmic prostaglandins are coadministered with NSAIDs (either systemic or ophthalmic).
- bisoprolol
bisoprolol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of bisoprolol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - bivalirudin
bivalirudin and aspirin both increase anticoagulation. Modify Therapy/Monitor Closely.
aspirin, bivalirudin. Either increases toxicity of the other by anticoagulation. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely. - brexanolone
brexanolone, carisoprodol. Either increases toxicity of the other by sedation. Use Caution/Monitor.
brexanolone, codeine. Either increases toxicity of the other by sedation. Use Caution/Monitor. - brexpiprazole
brexpiprazole and carisoprodol both increase sedation. Use Caution/Monitor.
brexpiprazole and codeine both increase sedation. Use Caution/Monitor. - brimonidine
brimonidine and carisoprodol both increase sedation. Use Caution/Monitor.
- brinzolamide
brinzolamide, aspirin. Either increases levels of the other by Other (see comment). Use Caution/Monitor. Comment: Carbonic anhydrase inhibitors (CAIs) and salicylates inhibit each other's renal tubular secretion, resulting in increased plasma levels. CAIs also shift salicylates from plasma to the CNS, leading to potential neurotoxicity.
- brivaracetam
brivaracetam and codeine both increase sedation. Use Caution/Monitor.
- brivaracetam
brivaracetam and carisoprodol both increase sedation. Use Caution/Monitor.
- brompheniramine
brompheniramine and carisoprodol both increase sedation. Use Caution/Monitor.
brompheniramine and codeine both increase sedation. Use Caution/Monitor. - bumetanide
aspirin increases and bumetanide decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
aspirin decreases effects of bumetanide by pharmacodynamic antagonism. Use Caution/Monitor. NSAIDs decrease prostaglandin synthesis. - buprenorphine
buprenorphine and codeine both increase sedation. Use Caution/Monitor.
carisoprodol and buprenorphine both increase sedation. Use Caution/Monitor. - buprenorphine buccal
carisoprodol and buprenorphine buccal both increase sedation. Use Caution/Monitor.
buprenorphine buccal and codeine both increase sedation. Use Caution/Monitor. - buprenorphine, long-acting injection
buprenorphine, long-acting injection increases effects of carisoprodol by Other (see comment). Modify Therapy/Monitor Closely. Comment: Buprenorphine may enhance the neuromuscular blocking action of skeletal muscle relaxants and increase risk for respiratory depression. Monitor for signs of respiratory depression that may be greater than otherwise expected and decrease muscle relaxant dosage as necessary.
codeine 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. - bupropion
bupropion will decrease the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents the conversion of codeine to its active metabolite morphine.
- butabarbital
butabarbital and carisoprodol both increase sedation. Use Caution/Monitor.
- butabarbital
butabarbital and codeine both increase sedation. Use Caution/Monitor.
- butalbital
butalbital and codeine both increase sedation. Use Caution/Monitor.
butalbital and carisoprodol both increase sedation. Use Caution/Monitor. - butorphanol
butorphanol and codeine both increase sedation. Use Caution/Monitor.
carisoprodol and butorphanol both increase sedation. Use Caution/Monitor. - caffeine
codeine increases and caffeine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- candesartan
candesartan and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of candesartan by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. NSAIDs decrease synthesis of vasodilating renal prostaglandins, and thus affect fluid homeostasis and may diminish antihypertensive effect.
candesartan, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly in elderly or volume depleted individuals. - cannabidiol
cannabidiol will increase the level or effect of carisoprodol by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Consider reducing the dose of sensitive CYP2C19 substrates, as clinically appropriate, when coadministered with cannabidiol.
- captopril
captopril, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly with high dose aspirin, elderly or volume depleted individuals.
- carbenoxolone
aspirin increases and carbenoxolone decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- carbinoxamine
carbinoxamine and codeine both increase sedation. Use Caution/Monitor.
carbinoxamine and carisoprodol both increase sedation. Use Caution/Monitor. - carisoprodol
carisoprodol and codeine both increase sedation. Use Caution/Monitor.
- carvedilol
carvedilol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of carvedilol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - celecoxib
aspirin and celecoxib both increase anticoagulation. Use Caution/Monitor.
aspirin and celecoxib both increase serum potassium. Use Caution/Monitor. - celiprolol
celiprolol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of celiprolol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - cenobamate
cenobamate will increase the level or effect of carisoprodol by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Consider a dose reduction of CYP2C19 substrates, as clinically appropriate, when used concomitantly with cenobamate.
cenobamate, carisoprodol. Either increases effects of the other by sedation. Use Caution/Monitor. - celecoxib
celecoxib decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- cenobamate
cenobamate, codeine. Either increases effects of the other by sedation. Use Caution/Monitor.
- chloral hydrate
chloral hydrate and codeine both increase sedation. Use Caution/Monitor.
chloral hydrate and carisoprodol both increase sedation. Use Caution/Monitor. - chlordiazepoxide
chlordiazepoxide and codeine both increase sedation. Use Caution/Monitor.
chlordiazepoxide and carisoprodol both increase sedation. Use Caution/Monitor. - chloroquine
chloroquine will increase the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- chlorothiazide
aspirin increases and chlorothiazide decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- chlorpheniramine
chlorpheniramine and carisoprodol both increase sedation. Use Caution/Monitor.
- chlorpheniramine
chlorpheniramine and codeine both increase sedation. Use Caution/Monitor.
- chlorpromazine
chlorpromazine will decrease the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine
codeine and chlorpromazine both increase sedation. Use Caution/Monitor.
carisoprodol and chlorpromazine both increase sedation. Use Caution/Monitor. - chlorpropamide
aspirin increases effects of chlorpropamide by unknown mechanism. Use Caution/Monitor. Risk of hypoglycemia.
- chlorthalidone
aspirin increases and chlorthalidone decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- chlorzoxazone
chlorzoxazone and codeine both increase sedation. Use Caution/Monitor.
- choline magnesium trisalicylate
aspirin and choline magnesium trisalicylate both increase anticoagulation. Use Caution/Monitor.
aspirin and choline magnesium trisalicylate both increase serum potassium. Use Caution/Monitor. - cilostazol
aspirin, cilostazol. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely.
- cinnamon
aspirin and cinnamon both increase anticoagulation. Use Caution/Monitor.
- cinnarizine
cinnarizine and carisoprodol both increase sedation. Use Caution/Monitor.
- cimetidine
cimetidine will increase the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- cinacalcet
cinacalcet decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- cinnarizine
cinnarizine and codeine both increase sedation. Use Caution/Monitor.
- ciprofloxacin
aspirin decreases levels of ciprofloxacin by Other (see comment). Use Caution/Monitor. Comment: Buffered aspirin may decrease absorption of quinolones. Consider administering 2 hr before or 6 hr after, buffered aspirin administration.
- citalopram
citalopram, aspirin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of upper GI bleeding. If possible, avoid concurrent use.
- clemastine
clemastine and carisoprodol both increase sedation. Use Caution/Monitor.
clemastine and codeine both increase sedation. Use Caution/Monitor. - clobazam
carisoprodol, clobazam. Other (see comment). Use Caution/Monitor. Comment: Concomitant administration can increase the potential for CNS effects (e.g., increased sedation or respiratory depression).
codeine, clobazam. Other (see comment). Use Caution/Monitor. Comment: Concomitant administration can increase the potential for CNS effects (e.g., increased sedation or respiratory depression).
clobazam decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine. - clomipramine
clomipramine, aspirin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of upper GI bleeding. Clomipramine inhib. serotonin uptake by platelets.
codeine and clomipramine both increase sedation. Use Caution/Monitor.
clomipramine decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
carisoprodol and clomipramine both increase sedation. Use Caution/Monitor. - clonazepam
clonazepam and carisoprodol both increase sedation. Use Caution/Monitor.
clonazepam and codeine both increase sedation. Use Caution/Monitor. - clopidogrel
aspirin, clopidogrel. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely.
- clorazepate
clorazepate and codeine both increase sedation. Use Caution/Monitor.
clorazepate and carisoprodol both increase sedation. Use Caution/Monitor. - clozapine
codeine and clozapine both increase sedation. Use Caution/Monitor.
carisoprodol and clozapine both increase sedation. Use Caution/Monitor.
clozapine decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine. - cocaine topical
cocaine topical decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- codeine
carisoprodol and codeine both increase sedation. Use Caution/Monitor.
- collagenase clostridium histolyticum
aspirin increases toxicity of collagenase clostridium histolyticum by anticoagulation. Use Caution/Monitor. Collagenase clostridium histolyticum has high incidence of ecchymosis/contusion at injection site; avoid concomitant anticoagulants (except for low-dose aspirin, ie, up to 150 mg/day).
- cordyceps
aspirin and cordyceps both increase anticoagulation. Use Caution/Monitor.
- cortisone
aspirin, cortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
- cyclizine
cyclizine and carisoprodol both increase sedation. Use Caution/Monitor.
cyclizine and codeine both increase sedation. Use Caution/Monitor. - cyclobenzaprine
cyclobenzaprine and codeine both increase sedation. Use Caution/Monitor.
carisoprodol and cyclobenzaprine both increase sedation. Use Caution/Monitor. - cyclopenthiazide
aspirin increases and cyclopenthiazide decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- cyproheptadine
cyproheptadine and codeine both increase sedation. Use Caution/Monitor.
cyproheptadine and carisoprodol both increase sedation. Use Caution/Monitor. - dabigatran
dabigatran and aspirin both increase anticoagulation. Modify Therapy/Monitor Closely. Both drugs have the potential to cause bleeding. The need for simultaneous use of low-dose aspirin (<100 mg/day) with anticoagulants are common for patients with cardiovascular disease, but may result in increased bleeding; monitor closely. Promptly evaluate any signs or symptoms of blood loss if treated concomitantly with low-dose aspirin. Avoid coadministration with chronic use of higher dose aspirin
- dalteparin
dalteparin and aspirin both increase anticoagulation. Modify Therapy/Monitor Closely.
aspirin, dalteparin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely. - dantrolene
dantrolene and codeine both increase sedation. Use Caution/Monitor.
carisoprodol and dantrolene both increase sedation. Use Caution/Monitor. - daridorexant
codeine 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.
carisoprodol 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 effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- deferasirox
deferasirox, aspirin. Other (see comment). Use Caution/Monitor. Comment: Combination may increase GI bleeding, ulceration and irritation. Use with caution.
- defibrotide
defibrotide increases effects of aspirin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Defibrotide may enhance effects of platelet inhibitors.
- deflazacort
aspirin, deflazacort. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
- desipramine
carisoprodol and desipramine both increase sedation. Use Caution/Monitor.
- desflurane
desflurane and codeine both increase sedation. Use Caution/Monitor. Opioids may decrease MAC requirements, less inhalation anesthetic may be required.
- desipramine
codeine and desipramine both increase sedation. Use Caution/Monitor.
desipramine decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine. - desirudin
aspirin, desirudin. Either increases levels of the other by pharmacodynamic synergism. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely.
- desvenlafaxine
desvenlafaxine will increase the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Desvenlafaxine inhibits CYP2D6; with higher desvenlafaxine doses (ie, 400 mg) decrease the CYP2D6 substrate dose by up to 50%; no dosage adjustment needed with desvenlafaxine doses <100 mg
- deutetrabenazine
codeine and deutetrabenazine both increase sedation. Use Caution/Monitor.
- dexamethasone
aspirin, dexamethasone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
- dexchlorpheniramine
dexchlorpheniramine and carisoprodol both increase sedation. Use Caution/Monitor.
dexchlorpheniramine and codeine both increase sedation. Use Caution/Monitor. - dexfenfluramine
codeine increases and dexfenfluramine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
carisoprodol increases and dexfenfluramine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. - dexmedetomidine
dexmedetomidine and carisoprodol both increase sedation. Use Caution/Monitor.
dexmedetomidine and codeine both increase sedation. Use Caution/Monitor. - dexmethylphenidate
codeine increases and dexmethylphenidate decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- dextromoramide
carisoprodol and dextromoramide both increase sedation. Use Caution/Monitor.
- dextroamphetamine
codeine increases and dextroamphetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- dextromoramide
codeine and dextromoramide both increase sedation. Use Caution/Monitor.
- diamorphine
carisoprodol and diamorphine both increase sedation. Use Caution/Monitor.
codeine and diamorphine both increase sedation. Use Caution/Monitor. - diazepam
diazepam and carisoprodol both increase sedation. Use Caution/Monitor.
diazepam and codeine both increase sedation. Use Caution/Monitor. - diazepam intranasal
diazepam intranasal, carisoprodol. Either increases effects of the other by pharmacodynamic synergism. Use Caution/Monitor. Coadministration may potentiate the CNS-depressant effects of each drug.
- diclofenac
aspirin and diclofenac both increase anticoagulation. Use Caution/Monitor.
aspirin and diclofenac both increase serum potassium. Use Caution/Monitor. - dicloxacillin
dicloxacillin, aspirin. Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.
- diethylpropion
codeine increases and diethylpropion decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- difelikefalin
difelikefalin and codeine both increase sedation. Use Caution/Monitor.
difelikefalin and carisoprodol both increase sedation. Use Caution/Monitor. - difenoxin hcl
carisoprodol and difenoxin hcl both increase sedation. Use Caution/Monitor.
codeine and difenoxin hcl both increase sedation. Use Caution/Monitor. - diflunisal
aspirin and diflunisal both increase anticoagulation. Use Caution/Monitor.
aspirin and diflunisal both increase serum potassium. Use Caution/Monitor. - digoxin
aspirin and digoxin both increase serum potassium. Use Caution/Monitor.
- dimenhydrinate
dimenhydrinate and carisoprodol both increase sedation. Use Caution/Monitor.
dimenhydrinate and codeine both increase sedation. Use Caution/Monitor. - diphenhydramine
diphenhydramine decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
diphenhydramine and codeine both increase sedation. Use Caution/Monitor.
diphenhydramine and carisoprodol both increase sedation. Use Caution/Monitor. - diphenoxylate hcl
codeine and diphenoxylate hcl both increase sedation. Use Caution/Monitor.
carisoprodol and diphenoxylate hcl both increase sedation. Use Caution/Monitor. - dipipanone
codeine and dipipanone both increase sedation. Use Caution/Monitor.
carisoprodol and dipipanone both increase sedation. Use Caution/Monitor. - dipyridamole
aspirin, dipyridamole. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely.
- dobutamine
codeine increases and dobutamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
aspirin increases and dobutamine decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor. - dong quai
aspirin and dong quai both increase anticoagulation. Use Caution/Monitor.
- dopamine
codeine increases and dopamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- dopexamine
carisoprodol increases and dopexamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
codeine increases and dopexamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. - dopexamine
aspirin increases and dopexamine decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- dosulepin
codeine and dosulepin both increase sedation. Use Caution/Monitor.
carisoprodol and dosulepin both increase sedation. Use Caution/Monitor. - doxazosin
aspirin decreases effects of doxazosin by pharmacodynamic antagonism. Use Caution/Monitor. NSAIDs decrease prostaglandin synthesis.
- doxepin
codeine and doxepin both increase sedation. Use Caution/Monitor.
carisoprodol and doxepin both increase sedation. Use Caution/Monitor. - doxylamine
doxylamine and codeine both increase sedation. Use Caution/Monitor.
doxylamine and carisoprodol both increase sedation. Use Caution/Monitor. - dronedarone
dronedarone decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- droperidol
carisoprodol and droperidol both increase sedation. Use Caution/Monitor.
- droperidol
codeine and droperidol both increase sedation. Use Caution/Monitor.
- drospirenone
drospirenone and aspirin both increase serum potassium. Modify Therapy/Monitor Closely.
- duloxetine
duloxetine, aspirin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of upper GI bleeding. SSRIs inhib. serotonin uptake by platelets.
duloxetine decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine. - edoxaban
edoxaban, aspirin. Either increases toxicity of the other by anticoagulation. Modify Therapy/Monitor Closely. Both drugs have the potential to cause bleeding. The need for simultaneous use of low-dose aspirin (<100 mg/day) with anticoagulants are common for patients with cardiovascular disease, but may result in increased bleeding; monitor closely. Promptly evaluate any signs or symptoms of blood loss if treated concomitantly with low-dose aspirin. Avoid coadministration with chronic use of higher dose aspirin.
- elagolix
elagolix will increase the level or effect of carisoprodol by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Elagolix is a weak CYP2C19 inhibitor. Caution with sensitive CYP2C19 substrates.
- elvitegravir/cobicistat/emtricitabine/tenofovir DF
elvitegravir/cobicistat/emtricitabine/tenofovir DF, aspirin. Either increases toxicity of the other by decreasing renal clearance. Modify Therapy/Monitor Closely. Toxicity may result from coadministration of emtricitabine and tenofovir with other drugs that are also primarily excreted by glomerular filtration and/or active tubular secretion including high-dose or multiple-dose NSAIDs; alternatives to NSAIDs should be considered.
elvitegravir/cobicistat/emtricitabine/tenofovir DF increases levels of codeine by affecting hepatic enzyme CYP2D6 metabolism. Modify Therapy/Monitor Closely. Cobicistat is a CYP2D6 inhibitor; caution with CYP2D6 substrates for which elevated plasma concentrations are associated with serious and/or life-threatening events. - enalapril
enalapril, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly with high dose aspirin, in elderly or volume depleted individuals.
- ephedrine
codeine increases and ephedrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- enoxaparin
enoxaparin and aspirin both increase anticoagulation. Use Caution/Monitor. Additive effects are intended when both drugs are prescribed as indicated for unstable angina, non-Q-wave MI, and STEMI
aspirin, enoxaparin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely. - ephedrine
aspirin increases and ephedrine decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- epinephrine
aspirin increases and epinephrine decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
codeine increases and epinephrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. - epinephrine racemic
codeine increases and epinephrine racemic decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
aspirin increases and epinephrine racemic decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor. - epoprostenol
aspirin and epoprostenol both increase anticoagulation. Use Caution/Monitor.
- esketamine intranasal
esketamine intranasal, codeine. Either increases toxicity of the other by sedation. Modify Therapy/Monitor Closely.
esketamine intranasal, carisoprodol. Either increases toxicity of the other by sedation. Modify Therapy/Monitor Closely. - eprosartan
eprosartan and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of eprosartan by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. NSAIDs decrease synthesis of vasodilating renal prostaglandins, and thus affect fluid homeostasis and may diminish antihypertensive effect.
eprosartan, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly in elderly or volume depleted individuals. - eptifibatide
aspirin, eptifibatide. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely.
- escitalopram
escitalopram, aspirin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of upper GI bleeding. SSRIs inhib. serotonin uptake by platelets.
- eslicarbazepine acetate
eslicarbazepine acetate will increase the level or effect of carisoprodol by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.
- esmolol
esmolol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of esmolol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - estazolam
estazolam and codeine both increase sedation. Use Caution/Monitor.
- estazolam
estazolam and carisoprodol both increase sedation. Use Caution/Monitor.
- ethacrynic acid
aspirin increases and ethacrynic acid decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- ethanol
carisoprodol and ethanol both increase sedation. Use Caution/Monitor.
codeine and ethanol both increase sedation. Use Caution/Monitor. - etodolac
aspirin and etodolac both increase anticoagulation. Use Caution/Monitor.
aspirin and etodolac both increase serum potassium. Use Caution/Monitor. - etomidate
etomidate and codeine both increase sedation. Use Caution/Monitor.
etomidate and carisoprodol both increase sedation. Use Caution/Monitor. - fedratinib
fedratinib will increase the level or effect of carisoprodol by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. Adjust dose of drugs that are CYP2C19 substrates as necessary.
fedratinib will increase the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Adjust dose of drugs that are CYP2D6 substrates as necessary. - fenbufen
aspirin and fenbufen both increase anticoagulation. Use Caution/Monitor.
aspirin and fenbufen both increase serum potassium. Use Caution/Monitor. - fenfluramine
carisoprodol increases and fenfluramine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
codeine increases and fenfluramine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. - fennel
aspirin and fennel both increase anticoagulation. Use Caution/Monitor.
- fenoprofen
aspirin and fenoprofen both increase anticoagulation. Use Caution/Monitor.
aspirin and fenoprofen both increase serum potassium. Use Caution/Monitor. - feverfew
aspirin and feverfew both increase anticoagulation. Use Caution/Monitor.
- fexinidazole
fexinidazole will increase the level or effect of carisoprodol by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.
- fish oil
fish oil, aspirin. Other (see comment). Use Caution/Monitor. Comment: Patients taking fish oil and an anticoagulant or other drug affecting coagulation should be monitored periodically due to potential increased risk of bleeding. .
- fish oil triglycerides
fish oil triglycerides will increase the level or effect of aspirin by anticoagulation. Use Caution/Monitor. Prolonged bleeding reported in patients taking antiplatelet agents or anticoagulants and oral omega-3 fatty acids. Periodically monitor bleeding time in patients receiving fish oil triglycerides and concomitant antiplatelet agents or anticoagulants.
- flibanserin
codeine and flibanserin both increase sedation. Modify Therapy/Monitor Closely. Risk for sedation increased if flibanserin is coadministration with other CNS depressants.
- fludrocortisone
aspirin, fludrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
- fluoxetine
fluoxetine, aspirin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of upper GI bleeding. SSRIs inhib. serotonin uptake by platelets.
fluoxetine will decrease the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine - fluphenazine
carisoprodol and fluphenazine both increase sedation. Use Caution/Monitor.
codeine and fluphenazine both increase sedation. Use Caution/Monitor. - flurbiprofen
aspirin and flurbiprofen both increase anticoagulation. Use Caution/Monitor.
aspirin and flurbiprofen both increase serum potassium. Use Caution/Monitor. - flurazepam
flurazepam and codeine both increase sedation. Use Caution/Monitor.
flurazepam and carisoprodol both increase sedation. Use Caution/Monitor. - fluvoxamine
fluvoxamine, aspirin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of upper GI bleeding SSRIs inhib. serotonin uptake by platelets.
- fondaparinux
fondaparinux and aspirin both increase anticoagulation. Modify Therapy/Monitor Closely.
- formoterol
codeine increases and formoterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
aspirin increases and formoterol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor. - forskolin
aspirin and forskolin both increase anticoagulation. Use Caution/Monitor.
- gabapentin
gabapentin, codeine. Either increases effects of the other by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of CNS depressants can result in serious, life-threatening, and fatal respiratory depression. Use lowest dose possible and monitor for respiratory depression and sedation.
- gabapentin enacarbil
gabapentin enacarbil, codeine. Either increases effects of the other by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of CNS depressants can result in serious, life-threatening, and fatal respiratory depression. Use lowest dose possible and monitor for respiratory depression and sedation.
- ganaxolone
codeine and ganaxolone both increase sedation. Use Caution/Monitor.
carisoprodol and ganaxolone both increase sedation. Use Caution/Monitor. - fosinopril
fosinopril, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly with high dose aspirin, in elderly or volume depleted individuals.
- haloperidol
codeine and haloperidol both increase sedation. Use Caution/Monitor.
carisoprodol and haloperidol both increase sedation. Use Caution/Monitor.
haloperidol decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine. - furosemide
aspirin increases and furosemide decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- garlic
aspirin and garlic both increase anticoagulation. Use Caution/Monitor.
- gentamicin
aspirin increases and gentamicin decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- ginger
aspirin and ginger both increase anticoagulation. Use Caution/Monitor.
- ginkgo biloba
aspirin and ginkgo biloba both increase anticoagulation. Use Caution/Monitor.
- glimepiride
aspirin increases effects of glimepiride by unknown mechanism. Use Caution/Monitor. Risk of hypoglycemia.
- glipizide
aspirin increases effects of glipizide by unknown mechanism. Use Caution/Monitor. Risk of hypoglycemia.
- glyburide
aspirin increases effects of glyburide by unknown mechanism. Use Caution/Monitor. Risk of hypoglycemia.
- green tea
green tea increases effects of aspirin by pharmacodynamic synergism. Use Caution/Monitor. (Theoretical, due to caffeine content). Combination may increase risk of bleeding.
- griseofulvin
griseofulvin decreases levels of aspirin by unknown mechanism. Use Caution/Monitor.
- heparin
heparin and aspirin both increase anticoagulation. Modify Therapy/Monitor Closely.
aspirin, heparin. Either increases toxicity of the other by anticoagulation. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely. - horse chestnut seed
aspirin and horse chestnut seed both increase anticoagulation. Use Caution/Monitor.
- hyaluronidase
aspirin decreases effects of hyaluronidase by Other (see comment). Use Caution/Monitor. Comment: Salicylates, when given in large systemic doses, may render tissues partially resistant to the action of hyaluronidase. Patients may require larger amounts of hyaluronidase for equivalent dispersing effect.
- hydralazine
aspirin decreases effects of hydralazine by pharmacodynamic antagonism. Use Caution/Monitor. NSAIDs decrease prostaglandin synthesis.
- hydrochlorothiazide
aspirin increases and hydrochlorothiazide decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- hydrocortisone
aspirin, hydrocortisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
- hydromorphone
carisoprodol and hydromorphone both increase sedation. Use Caution/Monitor.
codeine and hydromorphone both increase sedation. Use Caution/Monitor. - hydroxyzine
hydroxyzine and codeine both increase sedation. Use Caution/Monitor.
hydroxyzine and carisoprodol both increase sedation. Use Caution/Monitor. - ibrutinib
ibrutinib will increase the level or effect of aspirin by anticoagulation. Use Caution/Monitor. Ibrutinib may increase the risk of hemorrhage in patients receiving antiplatelet or anticoagulant therapies and monitor for signs of bleeding.
- ibuprofen
aspirin and ibuprofen both increase anticoagulation. Use Caution/Monitor.
aspirin and ibuprofen both increase serum potassium. Use Caution/Monitor. - ibuprofen IV
aspirin will increase the level or effect of ibuprofen IV by acidic (anionic) drug competition for renal tubular clearance. Modify Therapy/Monitor Closely.
aspirin and ibuprofen IV both increase anticoagulation. Modify Therapy/Monitor Closely.
aspirin and ibuprofen IV both increase serum potassium. Use Caution/Monitor. - icosapent
icosapent, aspirin. Either increases effects of the other by pharmacodynamic synergism. Use Caution/Monitor. Icosapent may prolong bleeding time. Periodically monitor if coadministered with other drugs that affect bleeding.
- iloperidone
codeine and iloperidone both increase sedation. Use Caution/Monitor.
carisoprodol and iloperidone both increase sedation. Use Caution/Monitor. - imatinib
imatinib, aspirin. Either increases toxicity of the other by Other (see comment). Modify Therapy/Monitor Closely. Comment: Imatinib may cause thrombocytopenia; bleeding risk increased when imatinib is coadministered with anticoagulants, NSAIDs, platelet inhibitors, and thrombolytic agents.
- imipramine
codeine and imipramine both increase sedation. Use Caution/Monitor.
carisoprodol and imipramine both increase sedation. Use Caution/Monitor.
imipramine decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine. - incobotulinumtoxinA
carisoprodol, incobotulinumtoxinA. Either increases effects of the other by pharmacodynamic synergism. Use Caution/Monitor. Muscle relaxants may enhance botulinum toxin effects. Closely monitor for increased neuromuscular blockade.
- indapamide
aspirin increases and indapamide decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- indomethacin
aspirin and indomethacin both increase anticoagulation. Use Caution/Monitor.
aspirin and indomethacin both increase serum potassium. Use Caution/Monitor. - insulin aspart
aspirin increases effects of insulin aspart by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of insulin with high doses of salicylates (3 g/day or more) may increase risk for hypoglycemia. Insulin dose adjustment and increased frequency of glucose monitoring may be required.
- insulin aspart protamine/insulin aspart
aspirin increases effects of insulin aspart protamine/insulin aspart by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of insulin with high doses of salicylates (3 g/day or more) may increase risk for hypoglycemia. Insulin dose adjustment and increased frequency of glucose monitoring may be required.
- insulin degludec
aspirin increases effects of insulin degludec by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of insulin with high doses of salicylates (3 g/day or more) may increase risk for hypoglycemia. Insulin dose adjustment and increased frequency of glucose monitoring may be required.
- insulin degludec/insulin aspart
aspirin, insulin degludec/insulin aspart. Either increases effects of the other by pharmacodynamic synergism. Use Caution/Monitor. Both drugs decrease blood glucose.
- insulin detemir
aspirin increases effects of insulin detemir by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of insulin with high doses of salicylates (3 g/day or more) may increase risk for hypoglycemia. Insulin dose adjustment and increased frequency of glucose monitoring may be required.
- insulin glargine
aspirin increases effects of insulin glargine by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of insulin with high doses of salicylates (3 g/day or more) may increase risk for hypoglycemia. Insulin dose adjustment and increased frequency of glucose monitoring may be required.
- insulin glulisine
aspirin increases effects of insulin glulisine by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of insulin with high doses of salicylates (3 g/day or more) may increase risk for hypoglycemia. Insulin dose adjustment and increased frequency of glucose monitoring may be required.
- insulin inhaled
aspirin increases effects of insulin inhaled by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of insulin with high doses of salicylates (3 g/day or more) may increase risk for hypoglycemia. Insulin dose adjustment and increased frequency of glucose monitoring may be required.
- insulin isophane human/insulin regular human
aspirin increases effects of insulin isophane human/insulin regular human by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of insulin with high doses of salicylates (3 g/day or more) may increase risk for hypoglycemia. Insulin dose adjustment and increased frequency of glucose monitoring may be required.
- insulin lispro
aspirin increases effects of insulin lispro by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of insulin with high doses of salicylates (3 g/day or more) may increase risk for hypoglycemia. Insulin dose adjustment and increased frequency of glucose monitoring may be required.
- insulin lispro protamine/insulin lispro
aspirin increases effects of insulin lispro protamine/insulin lispro by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of insulin with high doses of salicylates (3 g/day or more) may increase risk for hypoglycemia. Insulin dose adjustment and increased frequency of glucose monitoring may be required.
- insulin NPH
aspirin increases effects of insulin NPH by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of insulin with high doses of salicylates (3 g/day or more) may increase risk for hypoglycemia. Insulin dose adjustment and increased frequency of glucose monitoring may be required.
- insulin regular human
aspirin increases effects of insulin regular human by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of insulin with high doses of salicylates (3 g/day or more) may increase risk for hypoglycemia. Insulin dose adjustment and increased frequency of glucose monitoring may be required.
- irbesartan
irbesartan and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of irbesartan by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. NSAIDs decrease synthesis of vasodilating renal prostaglandins, and thus affect fluid homeostasis and may diminish antihypertensive effect.
irbesartan, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly in elderly or volume depleted individuals. - isoniazid
isoniazid decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- isoproterenol
codeine increases and isoproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
aspirin increases and isoproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor. - ketamine
ketamine and codeine both increase sedation. Use Caution/Monitor.
ketamine and carisoprodol both increase sedation. Use Caution/Monitor. - ketoprofen
aspirin and ketoprofen both increase anticoagulation. Use Caution/Monitor.
aspirin and ketoprofen both increase serum potassium. Use Caution/Monitor. - ketoconazole
ketoconazole decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- ketorolac
aspirin and ketorolac both increase anticoagulation. Use Caution/Monitor.
aspirin and ketorolac both increase serum potassium. Use Caution/Monitor. - ketorolac intranasal
aspirin and ketorolac intranasal both increase anticoagulation. Use Caution/Monitor.
aspirin and ketorolac intranasal both increase serum potassium. Use Caution/Monitor. - ketotifen, ophthalmic
carisoprodol and ketotifen, ophthalmic both increase sedation. Use Caution/Monitor.
- ketotifen, ophthalmic
codeine and ketotifen, ophthalmic both increase sedation. Use Caution/Monitor.
- labetalol
labetalol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of labetalol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - lasmiditan
lasmiditan, codeine. 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.
lasmiditan, carisoprodol. 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. - latanoprost
latanoprost, aspirin. unspecified interaction mechanism. Use Caution/Monitor. There are conflicting reports from studies of either increased or decreased IOP when ophthalmic prostaglandins are coadministered with NSAIDs (either systemic or ophthalmic).
- latanoprostene bunod ophthalmic
latanoprostene bunod ophthalmic, aspirin. unspecified interaction mechanism. Use Caution/Monitor. There are conflicting reports from studies of either increased or decreased IOP when ophthalmic prostaglandins are coadministered with NSAIDs (either systemic or ophthalmic).
- lemborexant
lemborexant, codeine. 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.
lemborexant, carisoprodol. 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. - letermovir
letermovir increases levels of codeine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- levalbuterol
aspirin increases and levalbuterol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- levomilnacipran
levomilnacipran, aspirin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. SNRIs may further impair platelet activity in patients taking antiplatelet or anticoagulant drugs.
- levorphanol
carisoprodol and levorphanol both increase sedation. Use Caution/Monitor.
- levalbuterol
codeine increases and levalbuterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- levoketoconazole
levoketoconazole decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- levorphanol
codeine and levorphanol both increase sedation. Use Caution/Monitor.
- lisdexamfetamine
codeine increases and lisdexamfetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- lisinopril
lisinopril, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly with high dose aspirin, in elderly or volume depleted individuals.
- lithium
aspirin increases levels of lithium by decreasing renal clearance. Use Caution/Monitor.
- lofepramine
carisoprodol and lofepramine both increase sedation. Use Caution/Monitor.
codeine and lofepramine both increase sedation. Use Caution/Monitor. - lofexidine
codeine and lofexidine both increase sedation. Use Caution/Monitor.
carisoprodol and lofexidine both increase sedation. Use Caution/Monitor. - lopinavir
lopinavir decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- loprazolam
loprazolam and carisoprodol both increase sedation. Use Caution/Monitor.
- loprazolam
loprazolam and codeine both increase sedation. Use Caution/Monitor.
- lorazepam
lorazepam and carisoprodol both increase sedation. Use Caution/Monitor.
lorazepam and codeine both increase sedation. Use Caution/Monitor. - lorcaserin
lorcaserin will increase the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- lormetazepam
lormetazepam and carisoprodol both increase sedation. Use Caution/Monitor.
- lormetazepam
lormetazepam and codeine both increase sedation. Use Caution/Monitor.
- lornoxicam
aspirin and lornoxicam both increase anticoagulation. Use Caution/Monitor.
aspirin and lornoxicam both increase serum potassium. Use Caution/Monitor. - losartan
losartan and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of losartan by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. NSAIDs decrease synthesis of vasodilating renal prostaglandins, and thus affect fluid homeostasis and may diminish antihypertensive effect.
losartan, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly in elderly or volume depleted individuals. - loxapine
codeine and loxapine both increase sedation. Use Caution/Monitor.
carisoprodol and loxapine both increase sedation. Use Caution/Monitor. - loxapine inhaled
codeine and loxapine inhaled both increase sedation. Use Caution/Monitor.
carisoprodol and loxapine inhaled both increase sedation. Use Caution/Monitor. - lumacaftor/ivacaftor
lumacaftor/ivacaftor, carisoprodol. affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. In vitro studies suggest that lumacaftor may induce and ivacaftor may inhibit CYP2C19 substrates. .
- lumefantrine
lumefantrine will increase the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor.
- lurasidone
lurasidone, carisoprodol. 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.
lurasidone, codeine. 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
carisoprodol and maprotiline both increase sedation. Use Caution/Monitor.
codeine and maprotiline both increase sedation. Use Caution/Monitor. - marijuana
carisoprodol and marijuana both increase sedation. Use Caution/Monitor.
codeine and marijuana both increase sedation. Use Caution/Monitor. - meclofenamate
aspirin and meclofenamate both increase anticoagulation. Use Caution/Monitor.
aspirin and meclofenamate both increase serum potassium. Use Caution/Monitor. - mefenamic acid
aspirin and mefenamic acid both increase anticoagulation. Use Caution/Monitor.
aspirin and mefenamic acid both increase serum potassium. Use Caution/Monitor. - melatonin
melatonin increases effects of aspirin by anticoagulation. Use Caution/Monitor. Melatonin may decrease prothrombin time.
carisoprodol and melatonin both increase sedation. Use Caution/Monitor.
codeine and melatonin both increase sedation. Use Caution/Monitor. - meloxicam
aspirin and meloxicam both increase anticoagulation. Use Caution/Monitor.
aspirin and meloxicam both increase serum potassium. Use Caution/Monitor. - meperidine
codeine and meperidine both increase sedation. Use Caution/Monitor.
carisoprodol and meperidine both increase sedation. Use Caution/Monitor. - meprobamate
codeine and meprobamate both increase sedation. Use Caution/Monitor.
carisoprodol and meprobamate both increase sedation. Use Caution/Monitor. - mesalamine
mesalamine, aspirin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Additive nephrotoxicity.
- metaproterenol
aspirin increases and metaproterenol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
codeine increases and metaproterenol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. - metaxalone
carisoprodol and metaxalone both increase sedation. Use Caution/Monitor.
- methazolamide
methazolamide, aspirin. Either increases levels of the other by Other (see comment). Use Caution/Monitor. Comment: Carbonic anhydrase inhibitors (CAIs) and salicylates inhibit each other's renal tubular secretion, resulting in increased plasma levels. CAIs also shift salicylates from plasma to the CNS, leading to potential neurotoxicity.
- metaxalone
metaxalone and codeine both increase sedation. Use Caution/Monitor.
- methadone
codeine and methadone both increase sedation. Use Caution/Monitor.
carisoprodol and methadone both increase sedation. Use Caution/Monitor. - methamphetamine
codeine increases and methamphetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- methocarbamol
carisoprodol and methocarbamol both increase sedation. Use Caution/Monitor.
- methocarbamol
methocarbamol and codeine both increase sedation. Use Caution/Monitor.
- methyclothiazide
aspirin increases and methyclothiazide decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor. .
- methylenedioxymethamphetamine
codeine increases and methylenedioxymethamphetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
carisoprodol increases and methylenedioxymethamphetamine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. - methylprednisolone
aspirin, methylprednisolone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
- metolazone
aspirin increases and metolazone decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- metoprolol
metoprolol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of metoprolol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - midazolam
midazolam and carisoprodol both increase sedation. Use Caution/Monitor.
midazolam and codeine both increase sedation. Use Caution/Monitor. - midazolam intranasal
midazolam intranasal, codeine. Either increases effects 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.
midazolam intranasal, carisoprodol. Either increases effects 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
codeine increases and midodrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- milnacipran
milnacipran, aspirin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of upper GI bleeding. SSRIs inhib. serotonin uptake by platelets.
- mirtazapine
carisoprodol and mirtazapine both increase sedation. Use Caution/Monitor.
- mirabegron
mirabegron will increase the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor.
- mirtazapine
codeine and mirtazapine both increase sedation. Use Caution/Monitor.
- mistletoe
aspirin increases and mistletoe decreases anticoagulation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- modafinil
codeine increases and modafinil decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- moexipril
moexipril, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly with high dose aspirin, in elderly or volume depleted individuals.
- morphine
codeine and morphine both increase sedation. Use Caution/Monitor.
carisoprodol and morphine both increase sedation. Use Caution/Monitor. - motherwort
codeine and motherwort both increase sedation. Use Caution/Monitor.
carisoprodol and motherwort both increase sedation. Use Caution/Monitor. - moxisylyte
aspirin decreases effects of moxisylyte by pharmacodynamic antagonism. Use Caution/Monitor. NSAIDs decrease prostaglandin synthesis.
- moxonidine
codeine and moxonidine both increase sedation. Use Caution/Monitor.
carisoprodol and moxonidine both increase sedation. Use Caution/Monitor. - mycophenolate
aspirin will increase the level or effect of mycophenolate by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.
- nabilone
codeine and nabilone both increase sedation. Use Caution/Monitor.
carisoprodol and nabilone both increase sedation. Use Caution/Monitor. - nabumetone
aspirin and nabumetone both increase anticoagulation. Use Caution/Monitor.
aspirin and nabumetone both increase serum potassium. Use Caution/Monitor. - nadolol
nadolol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of nadolol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - nafcillin
nafcillin, aspirin. Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.
nafcillin, aspirin. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor. - nalbuphine
codeine and nalbuphine both increase sedation. Use Caution/Monitor.
carisoprodol and nalbuphine both increase sedation. Use Caution/Monitor. - naproxen
aspirin and naproxen both increase anticoagulation. Use Caution/Monitor.
aspirin and naproxen both increase serum potassium. Use Caution/Monitor. - nebivolol
nebivolol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of nebivolol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - nefazodone
nefazodone, aspirin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of upper GI bleeding. SSRIs inhib. serotonin uptake by platelets.
- nettle
aspirin increases and nettle decreases anticoagulation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- nitazoxanide
nitazoxanide, aspirin. Either increases levels of the other by Mechanism: plasma protein binding competition. Use Caution/Monitor.
- nitroglycerin rectal
aspirin will increase the level or effect of nitroglycerin rectal by Other (see comment). Use Caution/Monitor. The pharmacological effects of nitroglycerin may be enhanced by concomitant administration of aspirin.
- nitroglycerin sublingual
aspirin increases effects of nitroglycerin sublingual by additive vasodilation. Use Caution/Monitor. Vasodilatory and hemodynamic effects of NTG may be enhanced by coadministration with aspirin (additive effect desirable for emergent treatment).
- norepinephrine
aspirin increases and norepinephrine decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
codeine increases and norepinephrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. - nortriptyline
carisoprodol and nortriptyline both increase sedation. Use Caution/Monitor.
- olmesartan
olmesartan and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of olmesartan by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. NSAIDs decrease synthesis of vasodilating renal prostaglandins, and thus affect fluid homeostasis and may diminish antihypertensive effect.
olmesartan, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly in elderly or volume depleted individuals. - nortriptyline
codeine and nortriptyline both increase sedation. Use Caution/Monitor.
- olanzapine
codeine and olanzapine both increase sedation. Use Caution/Monitor.
carisoprodol and olanzapine both increase sedation. Use Caution/Monitor. - oliceridine
oliceridine, carisoprodol. 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.
carisoprodol increases toxicity of oliceridine by Other (see comment). Modify Therapy/Monitor Closely. Comment: Anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. Monitor for signs of urinary retention or reduced gastric motility if oliceridine is coadministered with anticholinergics.
oliceridine, codeine. 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. - ombitasvir/paritaprevir/ritonavir & dasabuvir (DSC)
ombitasvir/paritaprevir/ritonavir & dasabuvir (DSC) decreases effects of carisoprodol by unspecified interaction mechanism. Modify Therapy/Monitor Closely. Increase dose if clinically indicated.
- omega 3 carboxylic acids
omega 3 carboxylic acids, aspirin. Other (see comment). Use Caution/Monitor. Comment: Patients taking omega-3 acids and an anticoagulant or other drug affecting coagulation should be monitored periodically due to potential increased risk of bleeding.
- omega 3 fatty acids
omega 3 fatty acids, aspirin. Other (see comment). Use Caution/Monitor. Comment: Patients taking omega-3-fatty acids and an anticoagulant or other drug affecting coagulation should be monitored periodically due to potential increased risk of bleeding. .
- opium tincture
codeine and opium tincture both increase sedation. Use Caution/Monitor.
- opium tincture
carisoprodol and opium tincture both increase sedation. Use Caution/Monitor.
- orphenadrine
carisoprodol and orphenadrine both increase sedation. Use Caution/Monitor.
orphenadrine and codeine both increase sedation. Use Caution/Monitor. - ospemifene
aspirin, ospemifene. Either increases levels of the other by plasma protein binding competition. Modify Therapy/Monitor Closely.
- oxacillin
oxacillin, aspirin. Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.
oxacillin, aspirin. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor. - oxaprozin
aspirin and oxaprozin both increase anticoagulation. Use Caution/Monitor.
aspirin and oxaprozin both increase serum potassium. Use Caution/Monitor. - oxazepam
oxazepam and codeine both increase sedation. Use Caution/Monitor.
oxazepam and carisoprodol both increase sedation. Use Caution/Monitor. - oxycodone
carisoprodol and oxycodone both increase sedation. Use Caution/Monitor.
codeine and oxycodone both increase sedation. Use Caution/Monitor. - oxymorphone
codeine and oxymorphone both increase sedation. Use Caution/Monitor.
carisoprodol and oxymorphone both increase sedation. Use Caution/Monitor. - paliperidone
carisoprodol and paliperidone both increase sedation. Use Caution/Monitor.
codeine and paliperidone both increase sedation. Use Caution/Monitor. - panax ginseng
aspirin and panax ginseng both increase anticoagulation. Use Caution/Monitor.
- papaveretum
codeine and papaveretum both increase sedation. Use Caution/Monitor.
carisoprodol and papaveretum both increase sedation. Use Caution/Monitor. - papaverine
carisoprodol and papaverine both increase sedation. Use Caution/Monitor.
codeine and papaverine both increase sedation. Use Caution/Monitor. - parecoxib
aspirin and parecoxib both increase anticoagulation. Use Caution/Monitor.
aspirin and parecoxib both increase serum potassium. Use Caution/Monitor. - paroxetine
paroxetine, aspirin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of upper GI bleeding. SSRIs inhib. serotonin uptake by platelets.
paroxetine will decrease the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine. - pau d'arco
aspirin and pau d'arco both increase anticoagulation. Use Caution/Monitor.
- peginterferon alfa 2b
peginterferon alfa 2b, codeine. Other (see comment). Use Caution/Monitor. Comment: When patients are administered peginterferon alpha-2b with CYP2D6 substrates, the therapeutic effect of these drugs may be altered. Peginterferon alpha-2b may increase or decrease levels of CYP2D6 substrate.
- pegvisomant
codeine decreases effects of pegvisomant by unknown mechanism. Use Caution/Monitor.
- pentazocine
codeine and pentazocine both increase sedation. Use Caution/Monitor.
carisoprodol and pentazocine both increase sedation. Use Caution/Monitor. - pegaspargase
pegaspargase increases effects of aspirin by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of bleeding events.
- pentobarbital
pentobarbital and carisoprodol both increase sedation. Use Caution/Monitor.
pentobarbital and codeine both increase sedation. Use Caution/Monitor. - penbutolol
penbutolol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of penbutolol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - penicillin G aqueous
penicillin G aqueous, aspirin. Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.
penicillin G aqueous, aspirin. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor. - perampanel
perampanel and codeine both increase sedation. Use Caution/Monitor.
- perindopril
perindopril, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly with high doses of aspirin,in elderly or volume depleted individuals.
- perphenazine
carisoprodol and perphenazine both increase sedation. Use Caution/Monitor.
- perphenazine
codeine and perphenazine both increase sedation. Use Caution/Monitor.
- phendimetrazine
codeine increases and phendimetrazine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- phenindione
phenindione and aspirin both increase anticoagulation. Modify Therapy/Monitor Closely.
- phenobarbital
phenobarbital and codeine both increase sedation. Use Caution/Monitor.
phenobarbital and carisoprodol both increase sedation. Use Caution/Monitor. - phenoxybenzamine
aspirin decreases effects of phenoxybenzamine by pharmacodynamic antagonism. Use Caution/Monitor. NSAIDs decrease prostaglandin synthesis.
- phentermine
codeine increases and phentermine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- phentolamine
aspirin decreases effects of phentolamine by pharmacodynamic antagonism. Use Caution/Monitor. NSAIDs decrease prostaglandin synthesis.
- phenylephrine PO
carisoprodol increases and phenylephrine PO decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. .
- phenylephrine
codeine increases and phenylephrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- phenylephrine PO
codeine increases and phenylephrine PO decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. .
- pholcodine
carisoprodol and pholcodine both increase sedation. Use Caution/Monitor.
codeine and pholcodine both increase sedation. Use Caution/Monitor. - phytoestrogens
aspirin and phytoestrogens both increase anticoagulation. Use Caution/Monitor.
- pimozide
codeine and pimozide both increase sedation. Use Caution/Monitor.
carisoprodol and pimozide both increase sedation. Use Caution/Monitor. - pindolol
pindolol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of pindolol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - pirbuterol
aspirin increases and pirbuterol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
codeine increases and pirbuterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. - piroxicam
aspirin and piroxicam both increase anticoagulation. Use Caution/Monitor.
aspirin and piroxicam both increase serum potassium. Use Caution/Monitor. - prabotulinumtoxinA
carisoprodol increases effects of prabotulinumtoxinA by pharmacodynamic synergism. Use Caution/Monitor. Muscle relaxants may enhance botulinum toxin effects. Closely monitor for increased neuromuscular blockade.
- pivmecillinam
pivmecillinam, aspirin. Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.
pivmecillinam, aspirin. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor. - potassium acid phosphate
aspirin and potassium acid phosphate both increase serum potassium. Modify Therapy/Monitor Closely.
- potassium chloride
aspirin and potassium chloride both increase serum potassium. Modify Therapy/Monitor Closely.
- potassium citrate
aspirin and potassium citrate both increase serum potassium. Use Caution/Monitor.
- potassium iodide
potassium iodide and aspirin both increase serum potassium. Use Caution/Monitor.
- prasugrel
aspirin, prasugrel. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely.
- prazosin
aspirin decreases effects of prazosin by pharmacodynamic antagonism. Use Caution/Monitor. NSAIDs decrease prostaglandin synthesis.
- prednisolone
aspirin, prednisolone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
- prednisone
aspirin, prednisone. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of GI ulceration.
- pregabalin
pregabalin, codeine. Either increases effects of the other by pharmacodynamic synergism. Modify Therapy/Monitor Closely. Coadministration of CNS depressants can result in serious, life-threatening, and fatal respiratory depression. Use lowest dose possible and monitor for respiratory depression and sedation.
- primidone
primidone and carisoprodol both increase sedation. Use Caution/Monitor.
primidone and codeine both increase sedation. Use Caution/Monitor. - prochlorperazine
codeine and prochlorperazine both increase sedation. Use Caution/Monitor.
carisoprodol and prochlorperazine both increase sedation. Use Caution/Monitor. - promethazine
promethazine and carisoprodol both increase sedation. Use Caution/Monitor.
promethazine and codeine both increase sedation. Use Caution/Monitor. - propofol
propofol and carisoprodol both increase sedation. Use Caution/Monitor.
propofol and codeine both increase sedation. Use Caution/Monitor. - propranolol
propranolol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of propranolol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - propylhexedrine
codeine increases and propylhexedrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
carisoprodol increases and propylhexedrine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor. - protamine
protamine and aspirin both increase anticoagulation. Modify Therapy/Monitor Closely.
- protriptyline
codeine and protriptyline both increase sedation. Use Caution/Monitor.
carisoprodol and protriptyline both increase sedation. Use Caution/Monitor. - quazepam
quazepam and codeine both increase sedation. Use Caution/Monitor.
quazepam and carisoprodol both increase sedation. Use Caution/Monitor. - quetiapine
codeine and quetiapine both increase sedation. Use Caution/Monitor.
carisoprodol and quetiapine both increase sedation. Use Caution/Monitor. - quinapril
quinapril, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly with high doses of aspirin, in elderly or volume depleted individuals.
- quinidine
quinidine will decrease the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- ramelteon
carisoprodol and ramelteon both increase sedation. Use Caution/Monitor.
- ramelteon
codeine and ramelteon both increase sedation. Use Caution/Monitor.
- ramipril
ramipril, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly with high doses of aspirin, in elderly or volume depleted individuals.
- reishi
aspirin and reishi both increase anticoagulation. Use Caution/Monitor.
- remimazolam
remimazolam, codeine. 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.
remimazolam, carisoprodol. 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. - reteplase
aspirin, reteplase. Either increases toxicity of the other by anticoagulation. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely.
- ribociclib
ribociclib will increase the level or effect of codeine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.
- risperidone
carisoprodol and risperidone both increase sedation. Use Caution/Monitor.
- risperidone
codeine and risperidone both increase sedation. Use Caution/Monitor.
- ritonavir
ritonavir will decrease the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- rivaroxaban
aspirin, rivaroxaban. Either increases toxicity of the other by anticoagulation. Use Caution/Monitor. Both drugs have the potential to cause bleeding. The need for simultaneous use of low-dose aspirin (<100 mg/day) with anticoagulants are common for patients with cardiovascular disease, but may result in increased bleeding; monitor closely. Promptly evaluate any signs or symptoms of blood loss if treated concomitantly with low-dose aspirin. Avoid coadministration with chronic use of higher dose aspirin.
- rivastigmine
rivastigmine increases toxicity of aspirin by pharmacodynamic synergism. Use Caution/Monitor. Monitor patients for symptoms of active or occult gastrointestinal bleeding.
- rolapitant
rolapitant will increase the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Rolapitant may increase plasma concentrations of CYP2D6 substrates for at least 28 days following rolapitant administration.
- rucaparib
rucaparib will increase the level or effect of carisoprodol by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Adjust dosage of CYP2C19 substrates, if clinically indicated.
- sacubitril/valsartan
sacubitril/valsartan and aspirin both increase serum potassium. Use Caution/Monitor.
sacubitril/valsartan, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly in elderly or volume depleted individuals.
aspirin decreases effects of sacubitril/valsartan by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. NSAIDs decrease synthesis of vasodilating renal prostaglandins, and thus affect fluid homeostasis and may diminish antihypertensive effect. - salicylates (non-asa)
aspirin and salicylates (non-asa) both increase anticoagulation. Use Caution/Monitor.
aspirin and salicylates (non-asa) both increase serum potassium. Use Caution/Monitor. - salmeterol
codeine increases and salmeterol decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
aspirin increases and salmeterol decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor. - salsalate
aspirin and salsalate both increase anticoagulation. Use Caution/Monitor.
aspirin and salsalate both increase serum potassium. Use Caution/Monitor. - scullcap
codeine and scullcap both increase sedation. Use Caution/Monitor.
carisoprodol and scullcap both increase sedation. Use Caution/Monitor. - saw palmetto
saw palmetto increases toxicity of aspirin by unspecified interaction mechanism. Use Caution/Monitor. May increase risk of bleeding.
- secobarbital
secobarbital and codeine both increase sedation. Use Caution/Monitor.
secobarbital and carisoprodol both increase sedation. Use Caution/Monitor. - selegiline
selegiline increases toxicity of codeine by unknown mechanism. Modify Therapy/Monitor Closely. Potential for increased CNS depression, drowsiness, dizziness or hypotension, so use with any MAOI should be cautious.
- selumetinib
aspirin and selumetinib both increase anticoagulation. Modify Therapy/Monitor Closely. An increased risk of bleeding may occur in patients taking a vitamin-K antagonist or an antiplatelet agent with selumetinib. Monitor for bleeding and INR or PT in patients coadministered a vitamin-K antagonist or an antiplatelet agent with selumetinib.
- sertraline
sertraline, aspirin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of upper GI bleeding. SSRIs inhib. serotonin uptake by platelets.
- Siberian ginseng
aspirin and Siberian ginseng both increase anticoagulation. Use Caution/Monitor.
- shepherd's purse
carisoprodol and shepherd's purse both increase sedation. Use Caution/Monitor.
- sertraline
sertraline decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- sevoflurane
sevoflurane and codeine both increase sedation. Use Caution/Monitor.
- shepherd's purse
codeine and shepherd's purse both increase sedation. Use Caution/Monitor.
- silodosin
aspirin decreases effects of silodosin by pharmacodynamic antagonism. Use Caution/Monitor. NSAIDs decrease prostaglandin synthesis.
- sodium picosulfate/magnesium oxide/anhydrous citric acid
aspirin, sodium picosulfate/magnesium oxide/anhydrous citric acid. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May be associated with fluid and electrolyte imbalances.
- sodium sulfate/?magnesium sulfate/potassium chloride
sodium sulfate/?magnesium sulfate/potassium chloride increases toxicity of aspirin by Other (see comment). Use Caution/Monitor. Comment: Coadministration with medications that cause fluid and electrolyte abnormalities may increase the risk of adverse events of seizure, arrhythmias, and renal impairment.
- sodium sulfate/potassium sulfate/magnesium sulfate
sodium sulfate/potassium sulfate/magnesium sulfate increases toxicity of aspirin by Other (see comment). Use Caution/Monitor. Comment: Coadministration with medications that cause fluid and electrolyte abnormalities may increase the risk of adverse events of seizure, arrhythmias, and renal impairment.
- sotalol
sotalol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of sotalol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - sparsentan
sparsentan will decrease the level or effect of carisoprodol by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. Sparsentan (a CYP2C19 inducer) decreases exposure of CYP2C19 substrates and reduces efficacy related to these substrates.
aspirin and sparsentan both increase nephrotoxicity and/or ototoxicity. Use Caution/Monitor. Coadministration of NSAIDS, including selective COX-2 inhibitors, may result in deterioration of kidney function (eg, possible kidney failure). Monitor for signs of worsening renal function with concomitant use with NSAIDs. - spironolactone
spironolactone and aspirin both increase serum potassium. Modify Therapy/Monitor Closely.
aspirin decreases effects of spironolactone by unspecified interaction mechanism. Use Caution/Monitor. When used concomitantly, spironolactone dose may need to be titrated to higher maintenance dose and the patient should be observed closely to determine if the desired effect is obtained. - stiripentol
stiripentol, carisoprodol. Either increases effects of the other by sedation. Use Caution/Monitor. Concurrent use of medications with CNS depressant effects together with thalidomide should be avoided due to the risk for additive sedative effects.
stiripentol, codeine. 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 carisoprodol by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Consider reducing the dose of CYP2C19 substrates, if adverse reactions are experienced when administered concomitantly with stiripentol. - succinylcholine
aspirin and succinylcholine both increase serum potassium. Use Caution/Monitor.
- sufentanil
codeine and sufentanil both increase sedation. Use Caution/Monitor.
carisoprodol and sufentanil both increase sedation. Use Caution/Monitor. - sulfamethoxazole
aspirin, sulfamethoxazole. Either increases effects of the other by plasma protein binding competition. Use Caution/Monitor. Due to high protein binding capacity of both drugs, one may displace the other when coadministered leading to an enhanced effect of the displaced drug; risk is low with low dose aspirin.
- sulfasalazine
aspirin and sulfasalazine both increase anticoagulation. Use Caution/Monitor.
aspirin and sulfasalazine both increase serum potassium. Use Caution/Monitor. - sulindac
aspirin and sulindac both increase anticoagulation. Use Caution/Monitor.
aspirin and sulindac both increase serum potassium. Use Caution/Monitor. - suvorexant
suvorexant and codeine both increase sedation. Modify Therapy/Monitor Closely. Dosage adjustments of suvorexant and concomitant CNS depressants may be necessary
- tafluprost
tafluprost, aspirin. unspecified interaction mechanism. Use Caution/Monitor. There are conflicting reports from studies of either increased or decreased IOP when ophthalmic prostaglandins are coadministered with NSAIDs (either systemic or ophthalmic).
- tapentadol
carisoprodol and tapentadol both increase sedation. Use Caution/Monitor.
- tapentadol
codeine and tapentadol both increase sedation. Use Caution/Monitor.
- tecovirimat
tecovirimat will increase the level or effect of carisoprodol by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. Tecovirimat is a weak inhibitor of CYP2C8 and CYP2C19. Monitor for adverse effects if coadministered with sensitive substrates of these enzymes.
- telmisartan
telmisartan and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of telmisartan by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. NSAIDs decrease synthesis of vasodilating renal prostaglandins, and thus affect fluid homeostasis and may diminish antihypertensive effect.
telmisartan, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly in elderly or volume depleted individuals. - temazepam
temazepam and codeine both increase sedation. Use Caution/Monitor.
temazepam and carisoprodol both increase sedation. Use Caution/Monitor. - temocillin
temocillin, aspirin. Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.
temocillin, aspirin. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor. - tenecteplase
aspirin, tenecteplase. Either increases toxicity of the other by anticoagulation. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely.
- terazosin
aspirin decreases effects of terazosin by pharmacodynamic antagonism. Use Caution/Monitor. NSAIDs decrease prostaglandin synthesis.
- terbinafine
terbinafine will increase the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Modify Therapy/Monitor Closely. Assess need to reduce dose of CYP2D6-metabolized drug.
- terbutaline
aspirin increases and terbutaline decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- thioridazine
carisoprodol and thioridazine both increase sedation. Use Caution/Monitor.
- terbutaline
codeine increases and terbutaline decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- thioridazine
thioridazine decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
codeine and thioridazine both increase sedation. Use Caution/Monitor. - thiothixene
codeine and thiothixene both increase sedation. Use Caution/Monitor.
carisoprodol and thiothixene both increase sedation. Use Caution/Monitor. - ticagrelor
aspirin, ticagrelor. Other (see comment). Use Caution/Monitor. Comment: Maintenance doses of aspirin above 100 mg decreases effectiveness of ticagrelor. Therefore, after the initial loading dose of aspirin (usually 325 mg), use ticagrelor with a maintenance dose of aspirin of 75-100 mg.
- ticarcillin
ticarcillin, aspirin. Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.
ticarcillin, aspirin. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor. - ticlopidine
ticlopidine decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- timolol
timolol and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of timolol by pharmacodynamic antagonism. Use Caution/Monitor. Long term (>1 wk) NSAID use. NSAIDs decrease prostaglandin synthesis. - tirofiban
aspirin, tirofiban. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. The need for simultaneous use of low-dose aspirin and anticoagulant or antiplatelet agents are common for patients with cardiovascular disease; monitor closely.
- tobramycin inhaled
tobramycin inhaled and aspirin both increase nephrotoxicity and/or ototoxicity. Modify Therapy/Monitor Closely. Avoid concurrent or sequential use to decrease risk for ototoxicity
- tolazamide
aspirin increases effects of tolazamide by unknown mechanism. Use Caution/Monitor. Risk of hypoglycemia.
- tolbutamide
aspirin increases effects of tolbutamide by unknown mechanism. Use Caution/Monitor. Risk of hypoglycemia.
- tolfenamic acid
aspirin and tolfenamic acid both increase anticoagulation. Use Caution/Monitor.
aspirin and tolfenamic acid both increase serum potassium. Use Caution/Monitor. - tolmetin
aspirin and tolmetin both increase anticoagulation. Use Caution/Monitor.
aspirin and tolmetin both increase serum potassium. Use Caution/Monitor. - tolvaptan
aspirin and tolvaptan both increase serum potassium. Use Caution/Monitor.
- topiramate
carisoprodol and topiramate both increase sedation. Modify Therapy/Monitor Closely.
- topiramate
codeine and topiramate both increase sedation. Modify Therapy/Monitor Closely.
- torsemide
aspirin increases and torsemide decreases serum potassium. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- tramadol
carisoprodol and tramadol both increase sedation. Use Caution/Monitor.
codeine and tramadol both increase sedation. Use Caution/Monitor. - trandolapril
trandolapril, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly with high dose aspirin, in elderly and volume depleted.
- tranylcypromine
tranylcypromine decreases effects of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor. Prevents conversion of codeine to its active metabolite morphine.
- travoprost ophthalmic
travoprost ophthalmic, aspirin. unspecified interaction mechanism. Use Caution/Monitor. There are conflicting reports from studies of either increased or decreased IOP when ophthalmic prostaglandins are coadministered with NSAIDs (either systemic or ophthalmic).
- trazodone
trazodone, aspirin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of upper GI bleeding. SSRIs inhib. serotonin uptake by platelets.
carisoprodol and trazodone both increase sedation. Use Caution/Monitor. - trazodone
codeine and trazodone both increase sedation. Use Caution/Monitor.
- triamcinolone acetonide injectable suspension
aspirin, triamcinolone acetonide injectable suspension. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Aspirin in conjunction with corticosteroids in hypoprothrombinemia should used with caution. Clearance of salicylates may increase with concurrent use of corticosteroids.
- triamterene
triamterene and aspirin both increase serum potassium. Modify Therapy/Monitor Closely.
- triazolam
triazolam and carisoprodol both increase sedation. Use Caution/Monitor.
triazolam and codeine both increase sedation. Use Caution/Monitor. - triclabendazole
triclabendazole will increase the level or effect of carisoprodol by affecting hepatic enzyme CYP2C9/10 metabolism. Use Caution/Monitor. If plasma concentrations of the CYP2C19 substrates are elevated during triclabendazole, recheck plasma concentration of the CYP2C19 substrates after discontinuation of triclabendazole.
- triclofos
triclofos and codeine both increase sedation. Use Caution/Monitor.
- triclofos
triclofos and carisoprodol both increase sedation. Use Caution/Monitor.
- trifluoperazine
codeine and trifluoperazine both increase sedation. Use Caution/Monitor.
carisoprodol and trifluoperazine both increase sedation. Use Caution/Monitor. - trimipramine
codeine and trimipramine both increase sedation. Use Caution/Monitor.
carisoprodol and trimipramine both increase sedation. Use Caution/Monitor. - triprolidine
triprolidine and codeine both increase sedation. Use Caution/Monitor.
- valproic acid
aspirin increases levels of valproic acid by plasma protein binding competition. Use Caution/Monitor.
- valsartan
valsartan and aspirin both increase serum potassium. Use Caution/Monitor.
aspirin decreases effects of valsartan by pharmacodynamic antagonism. Modify Therapy/Monitor Closely. NSAIDs decrease synthesis of vasodilating renal prostaglandins, and thus affect fluid homeostasis and may diminish antihypertensive effect.
valsartan, aspirin. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: May result in renal function deterioration, particularly in elderly or volume depleted individuals. - venlafaxine
venlafaxine, aspirin. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Increased risk of upper GI bleeding. SSRIs inhib. serotonin uptake by platelets.
- voclosporin
voclosporin, aspirin. Either increases toxicity of the other by nephrotoxicity and/or ototoxicity. Modify Therapy/Monitor Closely. Coadministration with drugs associated with nephrotoxicity may increase the risk for acute and/or chronic nephrotoxicity.
- vorapaxar
aspirin, vorapaxar. Either increases effects of the other by anticoagulation. Use Caution/Monitor. Coadministration of anticoagulants, antiplatelets, or other drug affecting coagulation should be monitored periodically due to potential increased risk of bleeding.
aspirin, vorapaxar. Either increases effects of the other by pharmacodynamic synergism. Use Caution/Monitor. Additive antiplatelet effect may occur. - vortioxetine
aspirin, vortioxetine. Either increases effects of the other by anticoagulation. Use Caution/Monitor. Risk minimal with low-dose aspirin.
- warfarin
aspirin increases effects of warfarin by anticoagulation. Modify Therapy/Monitor Closely. Avoid coadministration of chronic high-dose aspirin. Aspirin's antiplatelet properties may increase anticoagulation effect of warfarin. The need for simultaneous use of low-dose aspirin and warfarin is common for patients with cardiovascular disease. .
- xylometazoline
carisoprodol increases and xylometazoline decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- venlafaxine
venlafaxine will increase the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Use Caution/Monitor.
- xylometazoline
codeine increases and xylometazoline decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- yohimbine
codeine increases and yohimbine decreases sedation. Effect of interaction is not clear, use caution. Use Caution/Monitor.
- zanubrutinib
aspirin, zanubrutinib. Either increases effects of the other by anticoagulation. Modify Therapy/Monitor Closely. Zanubrutinib-induced cytopenias increases risk of hemorrhage. Coadministration of zanubritinib with antiplatelets or anticoagulants may further increase this risk.
- ziconotide
codeine and ziconotide both increase sedation. Use Caution/Monitor.
carisoprodol and ziconotide both increase sedation. Use Caution/Monitor. - ziprasidone
codeine and ziprasidone both increase sedation. Use Caution/Monitor.
carisoprodol and ziprasidone both increase sedation. Use Caution/Monitor. - zotepine
aspirin decreases effects of zotepine by pharmacodynamic antagonism. Use Caution/Monitor. NSAIDs decrease prostaglandin synthesis.
codeine and zotepine both increase sedation. Use Caution/Monitor.
carisoprodol and zotepine both increase sedation. Use Caution/Monitor.
Minor (102)
- aceclofenac
aceclofenac will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- acemetacin
acemetacin will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- acetazolamide
aspirin will decrease the level or effect of acetazolamide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- acyclovir
aspirin will increase the level or effect of acyclovir by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- alendronate
aspirin, alendronate. Either increases toxicity of the other by pharmacodynamic synergism. Minor/Significance Unknown. Increased risk of GI ulceration.
- aluminum hydroxide
aluminum hydroxide, aspirin. Mechanism: passive renal tubular reabsorption due to increased pH. Minor/Significance Unknown. Salicylate levels increased at moderate doses; salicylate levels decreased at large doses (d/t increased renal excretion of unchanged salicylic acid).
- amikacin
aspirin increases levels of amikacin by decreasing renal clearance. Minor/Significance Unknown. Interaction mainly occurs in preterm infants.
- aminohippurate sodium
aspirin will increase the level or effect of aminohippurate sodium by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- anamu
aspirin and anamu both increase anticoagulation. Minor/Significance Unknown.
- anastrozole
aspirin will decrease the level or effect of anastrozole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- ascorbic acid
ascorbic acid will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
aspirin decreases levels of ascorbic acid by increasing renal clearance. Minor/Significance Unknown.
ascorbic acid increases levels of aspirin by decreasing renal clearance. Minor/Significance Unknown. - asenapine
asenapine will increase the level or effect of codeine by affecting hepatic enzyme CYP2D6 metabolism. Minor/Significance Unknown.
- balsalazide
aspirin will increase the level or effect of balsalazide by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- bendroflumethiazide
bendroflumethiazide will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- bismuth subsalicylate
bismuth subsalicylate increases effects of aspirin by pharmacodynamic synergism. Minor/Significance Unknown.
- brimonidine
brimonidine increases effects of codeine by pharmacodynamic synergism. Minor/Significance Unknown. Increased CNS depression.
- bumetanide
aspirin, bumetanide. Other (see comment). Minor/Significance Unknown. Comment: Salicylates are less likely than other NSAIDs to interact w/bumetanide.
- calcium carbonate
calcium carbonate, aspirin. Mechanism: passive renal tubular reabsorption due to increased pH. Minor/Significance Unknown. Salicylate levels increased at moderate doses; salicylate levels decreased at large doses (d/t increased renal excretion of unchanged salicylic acid).
- cefadroxil
cefadroxil will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- cefamandole
cefamandole will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- cefepime
cefepime will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- cefixime
cefixime will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- cefpirome
cefpirome will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- cefprozil
cefprozil will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- ceftazidime
ceftazidime will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- ceftibuten
ceftibuten will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- celecoxib
aspirin will increase the level or effect of celecoxib by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- cephalexin
cephalexin will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- ceritinib
aspirin will decrease the level or effect of ceritinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- chlorothiazide
chlorothiazide will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- chlorpropamide
aspirin will increase the level or effect of chlorpropamide by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
aspirin increases effects of chlorpropamide by plasma protein binding competition. Minor/Significance Unknown. Large dose of salicylate. - chlorthalidone
chlorthalidone will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- choline magnesium trisalicylate
aspirin will increase the level or effect of choline magnesium trisalicylate by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- chromium
aspirin increases levels of chromium by unspecified interaction mechanism. Minor/Significance Unknown.
- cortisone
cortisone decreases levels of aspirin by increasing renal clearance. Minor/Significance Unknown.
- creatine
creatine, aspirin. Mechanism: pharmacodynamic synergism. Minor/Significance Unknown. (Theoretical interaction) Combination may have additive nephrotoxic effects.
- cyanocobalamin
aspirin decreases levels of cyanocobalamin by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- cyclopenthiazide
cyclopenthiazide will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- cyclophosphamide
aspirin will decrease the level or effect of cyclophosphamide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- danshen
aspirin and danshen both increase anticoagulation. Minor/Significance Unknown.
- deflazacort
deflazacort decreases levels of aspirin by increasing renal clearance. Minor/Significance Unknown.
- devil's claw
aspirin and devil's claw both increase anticoagulation. Minor/Significance Unknown.
- dexamethasone
dexamethasone decreases levels of aspirin by increasing renal clearance. Minor/Significance Unknown.
- dextroamphetamine
dextroamphetamine increases effects of codeine by unspecified interaction mechanism. Minor/Significance Unknown.
- diclofenac
aspirin will increase the level or effect of diclofenac by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- diclofenac topical
diclofenac topical, aspirin. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. Although low, there is systemic exposure to diclofenac topical; theoretically, concomitant administration with systemic NSAIDS or aspirin may result in increased NSAID adverse effects.
- diflunisal
aspirin will increase the level or effect of diflunisal by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- diltiazem
diltiazem increases effects of aspirin by unknown mechanism. Minor/Significance Unknown. Enhanced antiplatelet activity.
- eplerenone
aspirin decreases effects of eplerenone by pharmacodynamic antagonism. Minor/Significance Unknown. NSAIDs decrease prostaglandin synthesis.
- ethanol
ethanol increases toxicity of aspirin by pharmacodynamic synergism. Minor/Significance Unknown. Increased risk of GI bleeding.
- etodolac
aspirin will increase the level or effect of etodolac by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- eucalyptus
codeine and eucalyptus both increase sedation. Minor/Significance Unknown.
carisoprodol and eucalyptus both increase sedation. Minor/Significance Unknown. - fenbufen
aspirin will increase the level or effect of fenbufen by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- fenoprofen
aspirin will increase the level or effect of fenoprofen by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- feverfew
aspirin decreases effects of feverfew by pharmacodynamic antagonism. Minor/Significance Unknown.
- fludrocortisone
fludrocortisone decreases levels of aspirin by increasing renal clearance. Minor/Significance Unknown.
- fluoxetine
fluoxetine decreases effects of codeine by decreasing metabolism. Minor/Significance Unknown. Decreased conversion of codeine to active metabolite morphine.
- flurbiprofen
aspirin will increase the level or effect of flurbiprofen by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- folic acid
aspirin decreases levels of folic acid by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- furosemide
aspirin decreases effects of furosemide by pharmacodynamic antagonism. Minor/Significance Unknown. NSAIDs decrease prostaglandin synthesis.
- ganciclovir
aspirin will increase the level or effect of ganciclovir by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- gentamicin
aspirin increases levels of gentamicin by decreasing renal clearance. Minor/Significance Unknown. Interaction mainly occurs in preterm infants.
- glimepiride
aspirin increases effects of glimepiride by plasma protein binding competition. Minor/Significance Unknown. Large dose of salicylate.
- glipizide
aspirin increases effects of glipizide by plasma protein binding competition. Minor/Significance Unknown. Large dose of salicylate.
- glyburide
aspirin increases effects of glyburide by plasma protein binding competition. Minor/Significance Unknown. Large dose of salicylate.
- hydrochlorothiazide
hydrochlorothiazide will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- hydrocortisone
hydrocortisone decreases levels of aspirin by increasing renal clearance. Minor/Significance Unknown.
- ibuprofen
aspirin will increase the level or effect of ibuprofen by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- imidapril
aspirin decreases effects of imidapril by pharmacodynamic antagonism. Minor/Significance Unknown. NSAIDs decrease prostaglandin synthesis.
- indapamide
indapamide will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- indomethacin
aspirin will increase the level or effect of indomethacin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- ketoprofen
aspirin will increase the level or effect of ketoprofen by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- ketorolac
aspirin will increase the level or effect of ketorolac by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- ketorolac intranasal
aspirin will increase the level or effect of ketorolac intranasal by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- L-methylfolate
aspirin decreases levels of L-methylfolate by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.
- larotrectinib
aspirin will decrease the level or effect of larotrectinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- levoketoconazole
aspirin will decrease the level or effect of levoketoconazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.
- lornoxicam
aspirin will increase the level or effect of lornoxicam by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- meclofenamate
aspirin will increase the level or effect of meclofenamate by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- mefenamic acid
aspirin will increase the level or effect of mefenamic acid by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- meloxicam
aspirin will increase the level or effect of meloxicam by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- mesalamine
aspirin will increase the level or effect of mesalamine by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- methyclothiazide
methyclothiazide will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- methylprednisolone
methylprednisolone decreases levels of aspirin by increasing renal clearance. Minor/Significance Unknown.
- metolazone
metolazone will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- nabumetone
aspirin will increase the level or effect of nabumetone by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- naproxen
aspirin will increase the level or effect of naproxen by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- neomycin PO
aspirin increases levels of neomycin PO by decreasing renal clearance. Minor/Significance Unknown. Interaction mainly occurs in preterm infants.
- noni juice
aspirin and noni juice both increase serum potassium. Minor/Significance Unknown.
- ofloxacin
ofloxacin, aspirin. Other (see comment). Minor/Significance Unknown. Comment: Risk of CNS stimulation/seizure. Mechanism: Displacement of GABA from receptors in brain.
- oxaprozin
aspirin will increase the level or effect of oxaprozin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- parecoxib
aspirin will increase the level or effect of parecoxib by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- paromomycin
aspirin increases levels of paromomycin by decreasing renal clearance. Minor/Significance Unknown. Interaction mainly occurs in preterm infants.
- penicillin VK
penicillin VK, aspirin. Either increases levels of the other by decreasing renal clearance. Minor/Significance Unknown.
- pentazocine
aspirin, pentazocine. Either increases toxicity of the other by pharmacodynamic synergism. Minor/Significance Unknown. Possible risk of renal papillary necrosis w/chronic Tx.
- piperacillin
piperacillin, aspirin. Either increases effects of the other by receptor binding competition. Minor/Significance Unknown. Salicylic acid could be displaced from protein binding sites or it could itself displace other protein-bound drugs and result in an enhanced effect of the displaced drug.
- piroxicam
aspirin will increase the level or effect of piroxicam by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
- prednisolone
prednisolone decreases levels of aspirin by increasing renal clearance. Minor/Significance Unknown.
- prednisone
prednisone decreases levels of aspirin by increasing renal clearance. Minor/Significance Unknown.
- rose hips
rose hips will increase the level or effect of aspirin by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
aspirin decreases levels of rose hips by increasing renal clearance. Minor/Significance Unknown.
rose hips increases levels of aspirin by decreasing renal clearance. Minor/Significance Unknown. - sage
carisoprodol and sage both increase sedation. Minor/Significance Unknown.
- salicylates (non-asa)
aspirin will increase the level or effect of salicylates (non-asa) by acidic (anionic) drug competition for renal tubular clearance. Minor/Significance Unknown.
Adverse Effects
>10%
Codeine
- Constipation
- Drowsiness
Carisoprodol
- Drowsiness (13-17%)
1-10%
Codeine
- Hypotension, tachycardia or bradycardia, confusion, dizziness, false feeling of well being, headache, lightheadedness, malaise, paradoxical CNS stimulation, restlessness, rash, urticaria, anorexia, nausea, vomiting, xerostomia, ureteral spasm, urination decreased, LFT's increased, burning at injection site, weakness, blurred vision, dyspnea, histamine release
Carisoprodol
- Dizziness (7-8%)
- Headache (3-5%)
Frequency Not Defined
Carisoprodol
- Cardiovascular: orthostatic hypotension, syncope, tachycardia, central nervous system: agitation, irritability, depression, allergic/idiosyncratic reactions (eg, pruritus, rash, dizziness), gastrointestinal: epigastric distress, N/V, facial flushing, weakness
Aspirin
- stomach pain, heartburn, nausea, vomiting, dyspepsia, tinnitus (high or chronic dose), rash, urticaria
Warnings
Black Box Warnings
Opioid analgesic risk evaluation and mitigation strategy (REMS)
- To ensure that benefits of opioid analgesics outweigh risks of addiction, abuse, and misuse, the Food and Drug Administration (FDA) has required a REMS for these products; under requirements of the REMS, drug companies with approved opioid analgesic products must make REMS-compliant education programs available to healthcare providers
-
Healthcare providers are strongly encouraged to:
- Complete a REMS-compliant education program
- Counsel patients and/or their caregivers, with every prescription, on safe use, serious risks, storage, and disposal of these products
- Emphasize to patients and their caregivers the importance of reading the Medication Guide every time it is provided by their pharmacist
- Consider other tools to improve patient, household, and community safety
Addiction, abuse, and misuse
- Risk of opioid addiction, abuse, and misuse, which can lead to overdose and death; assess each patient’s risk prior to prescribing and monitor all patients regularly for the development of these behaviors or conditions
Life-threatening respiratory depression
- Serious, life-threatening, or fatal respiratory depression may occur
- Monitor for respiratory depression, especially during initiation or following a dose increase
Accidental ingestion
- Accidental ingestion of even 1 dose, especially by children, can result in a fatal overdose
Neonatal opioid withdrawal syndrome
- Prolonged use during pregnancy can result in neonatal opioid withdrawal syndrome, which may be life-threatening if not recognized and treated, and requires management according to protocols developed by neonatology experts
- If opioid use is required for a prolonged period in a pregnant woman, advise the patient of the risk of neonatal opioid withdrawal syndrome and ensure that appropriate treatment will be available
Ultra-rapid metabolism of codeine and other risk factors for life-threatening respiratory depression in children
- Respiratory depression and death reported in children who received codeine following tonsillectomy and/or adenoidectomy that were also ultra-rapid metabolizers of codeine due to CYP2D6 polymorphism
- Contraindicated in children <12 years and in children <18 years following tonsillectomy and/or adenoidectomy; avoid use in adolescents 12-18 years who have risk factors that may increase sensitivity to respiratory depressant effects of codeine
Interactions with drugs affecting cytochrome P450 isoenzymes
- Use of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors requires careful consideration of the effects on parent drug, codeine, and active metabolite, morphine
Risks from concomitant use with benzodiazepines or other CNS depressants
- Concomitant use of opioids with benzodiazepines or other central nervous system (CNS) depressants, including alcohol, may result in profound sedation, respiratory depression, coma, and death
- Reserve concomitant prescribing of codeine sulfate tablets and benzodiazepines or other CNS depressants for use in patients for whom alternative treatment options are inadequate
- Limit dosages and durations to minimum required
- Follow patients for signs and symptoms of respiratory depression and sedation
Contraindications
Hypersensitivity
Children younger than 16 years old because of potential for Reye syndrome
Bronchospastic reaction to aspirin
Peptic ulcer disease
Repeated administration in patients with anemia, cardiovascular, pulmonary, or renal disease
Porphyria
Postoperative use in children following tonsillectomy and/or adenoidectomy (see Black Box Warnings)
Cautions
Gastrointestinal bleeding; particular caution in patients with history of GI bleed, alcoholism, or bleeding disorders
Avoid driving car or operating machinery
Reye syndrome may occur in children because of aspirin component; do not use for chickenpox or flu symptoms
Avoid in severe renal impairment (ie, CrCl <10 mL/min)
May increase respiratory depressant effects; caution with head injury, COPD, or other conditions with decreased respiratory drive
Codeine and carisoprodol may cause tolerance/dependency
Pregnancy & Lactation
Pregnancy category: D; avoid during pregnancy, particularly in third trimester because of risk for premature closure of the ductus arteriosus because of aspirin component; codeine may prolong delivery and cause respiratory depression/withdrawal symptoms in newborn
Lactation: excreted in breast milk; do not breast feed
Pregnancy Categories
A: Generally acceptable. Controlled studies in pregnant women show no evidence of fetal risk.
B: May be acceptable. Either animal studies show no risk but human studies not available or animal studies showed minor risks and human studies done and showed no risk. C: Use with caution if benefits outweigh risks. Animal studies show risk and human studies not available or neither animal nor human studies done. D: Use in LIFE-THREATENING emergencies when no safer drug available. Positive evidence of human fetal risk. X: Do not use in pregnancy. Risks involved outweigh potential benefits. Safer alternatives exist. NA: Information not available.Pharmacology
Mechanism of Action
Codeine: Opioid agonist; analgesia
Aspirin: Acts on hypothalamus to produce antipyresis; anti-inflammatory properties attributed to prostaglandin synthetase inhibition resulting in decreased formation of thromboxane A2
Carisoprodol: Centrally acting skeletal muscle relaxant (no direct muscle relaxation); partially metabolized to meprobamate which elicits anxiolytic/sedative effects
Pharmacogenomics
10% of codeine is metabolized to morphine by CYP2D6; the active morphine metabolite has a higher affinity for opioid receptors
CYP2D6 poor metabolizers may not achieve adequate analgesia
Ultra-rapid metabolizers (up to 7% of Caucasians and up to 30% of Asian and African populations) may have increased toxicity due to rapid conversion
Images
Formulary
Adding plans allows you to compare formulary status to other drugs in the same class.
To view formulary information first create a list of plans. Your list will be saved and can be edited at any time.
Adding plans allows you to:
- View the formulary and any restrictions for each plan.
- Manage and view all your plans together – even plans in different states.
- Compare formulary status to other drugs in the same class.
- Access your plan list on any device – mobile or desktop.