Drug Interactions

Learn about the major interaction between acyclovir and methotrexate, including risks of nephrotoxicity and how to manage concurrent use saf...

Learn about the minor interaction between acyclovir and levothyroxine, including potential effects on thyroid hormone levels and monitoring ...

Learn about the moderate interaction between allopurinol and warfarin. Allopurinol may increase warfarin's anticoagulant effect, requiring I...

Learn about the allopurinol and methotrexate interaction, including increased methotrexate toxicity risk, impaired clearance, and monitoring...

Why combining alprazolam and lorazepam is contraindicated: duplicate benzodiazepines increase overdose and respiratory depression risk.

Amitriptyline and tramadol together increase the risk of serotonin syndrome and seizures. Learn about the dangers and safer pain management ...

Learn about the amitriptyline and sertraline interaction, including serotonin syndrome risk, TCA toxicity from CYP2D6 inhibition, and cardia...

Amlodipine can modestly increase atorvastatin blood levels. Learn about the clinical significance and whether dose adjustments are needed.

Amlodipine and tadalafil together can cause additive blood pressure lowering. Learn about hypotension risk and safe management strategies.

Amoxicillin can increase methotrexate levels, raising the risk of serious toxicity. Learn about monitoring, management, and safer alternativ...

Adderall and buspirone may increase serotonin syndrome and cardiovascular risk. Learn about monitoring and safe management of this ADHD-anxi...

Learn about the Adderall and sertraline interaction, including serotonin syndrome risk, cardiovascular effects, and management strategies.

Understand the major interaction between apixaban and aspirin, including bleeding risks and when combination therapy may be necessary.

Naproxen increases bleeding risk when combined with apixaban. Learn about the interaction mechanisms, clinical impact, and safer pain relief...

Learn about the apixaban and clopidogrel interaction, including significantly increased bleeding risk, triple therapy considerations, and ma...

Learn about the moderate interaction between aripiprazole and modafinil, including CYP3A4 induction effects on aripiprazole levels and clini...

Learn about the aripiprazole and fluoxetine interaction, including CYP2D6 inhibition doubling aripiprazole levels, dose adjustment requireme...

Atenolol (a beta-blocker) and levalbuterol (a beta-agonist) have opposing actions and can reduce each other effectiveness. Learn about risks...

Learn about the atenolol and amlodipine interaction for blood pressure, including additive hypotension, heart rate effects, and monitoring n...

Understand the major interaction between atomoxetine and fluoxetine. Fluoxetine's CYP2D6 inhibition can dramatically increase atomoxetine bl...

Learn about the minor interaction between atorvastatin and amoxicillin and why this combination is generally safe.

Atorvastatin and metformin are commonly co-prescribed for diabetes management. Learn about their safety profile, interactions, and monitorin...

Learn about the major interaction between imatinib and atorvastatin. Imatinib inhibits CYP3A4, significantly increasing statin levels and my...

Learn about the minor interaction between azithromycin and omeprazole, including effects on absorption and clinical recommendations.

Learn about the moderate interaction between bupropion and sertraline, including how bupropion raises sertraline levels and what to monitor.

Learn how fluoxetine inhibits CYP2D6, increasing carvedilol levels and potentially causing excessive blood pressure and heart rate reduction...

Learn about the carvedilol and amlodipine interaction, including additive hypotension, CYP2D6 considerations, and monitoring for heart failu...

Celecoxib increases bleeding risk when combined with warfarin. Learn how COX-2 inhibitors differ from traditional NSAIDs in this interaction...

Understand the moderate interaction between cetirizine and hydroxyzine, why combining these antihistamines increases sedation risk, and safe...

Understand the moderate interaction between cetirizine and lorazepam. Combined CNS depression increases sedation, impaired coordination, and...

Ciprofloxacin may reduce levothyroxine absorption when taken together. Learn about proper timing, monitoring needs, and management strategie...

Ciprofloxacin significantly increases warfarin bleeding risk. Learn about INR monitoring, mechanism, and safer antibiotic alternatives.

Both citalopram and ondansetron prolong the QT interval. Combining them increases the risk of dangerous heart rhythm problems like torsades ...

Omeprazole can increase citalopram levels, raising the risk of QT prolongation and cardiac arrhythmias. Learn about dose limits and monitori...

Clonazepam and tramadol together significantly increase the risk of CNS depression, respiratory failure, and death. Learn about safer altern...

Clonidine and propranolol together risk rebound hypertensive crisis if clonidine is stopped abruptly. Learn about safe discontinuation and m...

Learn about the clonidine and amlodipine interaction, including additive hypotension risk, rebound hypertension concerns, and monitoring str...

Learn about the clopidogrel and aspirin interaction, including increased bleeding risks, when dual therapy is indicated, and monitoring.

Learn about the minor interaction between clopidogrel and oseltamivir (Tamiflu), including theoretical CYP2C19 concerns and clinical managem...

Understand the major interaction between clopidogrel and esomeprazole. Esomeprazole reduces clopidogrel activation, potentially increasing c...

Colchicine combined with atorvastatin increases the risk of myopathy and rhabdomyolysis. Learn about symptoms, monitoring, and safer alterna...

Understand the major interaction between cyclobenzaprine and tramadol. Both drugs have serotonergic activity, creating a risk of serotonin s...

Learn about the minor interaction between cyclobenzaprine and nifedipine, including additive blood pressure lowering and drowsiness consider...

Learn about using dapagliflozin and metformin together for type 2 diabetes. This common combination has complementary mechanisms with minor ...

Learn about the dapagliflozin and insulin glargine interaction, including hypoglycemia risk, euglycemic DKA awareness, and dose adjustment g...

Diazepam and gabapentin together increase the risk of severe sedation, respiratory depression, and overdose death. Learn about safe use and ...

Learn about the diazepam and tramadol interaction, including CNS and respiratory depression risk, serotonin syndrome, and FDA boxed warning.

Verapamil significantly raises digoxin levels, increasing the risk of life-threatening toxicity. Learn about dose adjustments and cardiac mo...

Diltiazem significantly increases simvastatin levels, raising the risk of rhabdomyolysis. Learn about dose limits, symptoms, and safer optio...

Understand the interaction between doxycycline and amoxicillin, including how bacteriostatic-bactericidal antagonism may reduce effectivenes...

Why combining duloxetine and sertraline is contraindicated due to severe serotonin syndrome risk, and what alternatives to consider.

Learn about combining duloxetine and gabapentin for pain management, including additive CNS depression, monitoring, and clinical guidance.

Learn about the duloxetine and tramadol interaction, including serotonin syndrome risk, seizure threshold lowering, and CYP2D6 interaction.

Learn why dutasteride and finasteride should not be combined. Both are 5-alpha reductase inhibitors — combining them adds toxicity without a...

Learn about the empagliflozin and insulin glargine interaction, including hypoglycemia risk, volume depletion, and DKA considerations.

Enoxaparin with aspirin significantly increases bleeding risk. Learn when this combination is necessary, monitoring requirements, and how to...

Understand the major interaction between escitalopram and trazodone, including serotonin syndrome warning signs and safer alternatives.

Learn how esomeprazole (Nexium) may reduce ibandronate absorption and effectiveness, and how to manage timing of these medications for osteo...

Learn about the esomeprazole and methotrexate interaction, including delayed methotrexate clearance, toxicity risk, and monitoring recommend...

Learn about combining ezetimibe and rosuvastatin for cholesterol management. This guideline-recommended combination has minimal interaction ...

Learn about the minor interaction between famotidine and omeprazole, including why using both acid-suppressing drugs is usually unnecessary.

Learn about the major interaction between fluoxetine and trazodone, including elevated serotonin syndrome risk due to CYP2D6 inhibition.

Learn about the major interaction between fluoxetine and bupropion, including seizure risk, elevated bupropion levels, and safe management.

Fluoxetine and tramadol together increase the risk of serotonin syndrome. Learn about symptoms, safe use, monitoring, and alternatives.

Fluoxetine inhibits metoprolol metabolism, potentially causing excessive heart rate and blood pressure lowering. Learn about monitoring and ...

Learn about the fluoxetine and buspirone drug interaction, including serotonin syndrome risk, CYP3A4 effects, and safe combination strategie...

Learn about the furosemide and digoxin interaction, including hypokalemia-induced digoxin toxicity risk, electrolyte monitoring, and managem...

Why gabapentin and pregabalin should never be taken together: duplicate mechanisms, overdose risks, and appropriate alternatives.

Learn about the major interaction between gabapentin and alprazolam, including risks of respiratory depression, oversedation, and overdose.

Gabapentin and tramadol together increase the risk of sedation and respiratory depression. Learn about safe use, monitoring, and alternative...

Gabapentin and sertraline are often prescribed together for anxiety or pain with depression. Learn about additive sedation risks and safe us...

Hydrochlorothiazide and irbesartan are combined in a fixed-dose product for hypertension. Learn about their interaction, electrolyte effects...

Hydroxychloroquine and azithromycin together increase QT prolongation risk and can cause fatal heart rhythm problems. Learn about cardiac mo...

Learn about the moderate interaction between ibandronate and levothyroxine. Both require empty-stomach dosing, creating an absorption confli...

Ibuprofen significantly increases bleeding risk when taken with warfarin. Learn why this combination is dangerous and what alternatives are ...

Ibuprofen can dangerously increase methotrexate levels, risking severe toxicity. Learn about the mechanism, risks, and safer pain relief opt...

Ibuprofen and budesonide together significantly raise the risk of GI bleeding and peptic ulcers. Learn about this major interaction and safe...

Learn about the ibuprofen and aspirin drug interaction, including how ibuprofen can block aspirin's cardioprotective effects and increase GI...

Learn about the major interaction between imatinib and simvastatin. Imatinib's CYP3A4 inhibition can dramatically increase simvastatin level...

Insulin glargine with pioglitazone increases hypoglycemia risk and can cause fluid retention and heart failure. Learn about monitoring and d...

Isotretinoin and doxycycline together can cause pseudotumor cerebri (raised brain pressure). This combination is contraindicated. Learn abou...

Learn about combining levetiracetam and topiramate for epilepsy. This guideline-supported combination has minimal pharmacokinetic interactio...

Omeprazole can reduce levothyroxine absorption, requiring dose adjustments. Learn about timing strategies, monitoring, and alternatives.

Pantoprazole can reduce levothyroxine absorption, requiring dose adjustments. Learn about timing strategies, monitoring, and management.

Learn how orlistat can reduce levothyroxine absorption, potentially causing hypothyroidism, and how to manage timing of these medications sa...

Linezolid and sertraline risk serotonin syndrome, a potentially fatal condition. Learn why this combination is contraindicated and what alte...

Liraglutide and metformin are often combined in type 2 diabetes. Learn about their interaction, safety, and clinical management.

Lisdexamfetamine (Vyvanse) with escitalopram (Lexapro) may increase serotonin syndrome risk. Learn about monitoring and safe use of this com...

Learn about the lisdexamfetamine (Vyvanse) and fluoxetine interaction, including serotonin syndrome risk, CYP2D6 inhibition, and monitoring.

Why combining lisinopril and losartan is contraindicated: dual RAAS blockade risks including hyperkalemia, renal failure, and hypotension.

Learn about the minor interaction between lisinopril and metformin, why they are commonly prescribed together, and what to watch for.

Lisinopril and spironolactone together raise the risk of dangerously high potassium. Learn the warning signs, who is most at risk, and monit...

Learn about combining lisinopril and amlodipine for blood pressure control, including safety, benefits, and monitoring recommendations.

Lisinopril combined with trimethoprim-sulfamethoxazole (Bactrim) increases the risk of dangerous hyperkalemia. Learn about monitoring and al...

Combining lisinopril (ACE inhibitor) and irbesartan (ARB) is generally contraindicated. Learn about hyperkalemia and renal failure risks.

Ibuprofen can significantly increase lithium blood levels, causing dangerous toxicity. Learn about monitoring, symptoms, and safer pain alte...

Learn about the interaction between lithium and memantine, including risks of CNS toxicity and NMDA-related effects, plus monitoring recomme...

Learn about the losartan and hydrochlorothiazide combination, a minor interaction that is often prescribed intentionally for blood pressure.

Understand the interaction between losartan and metoprolol, including additive blood pressure effects, monitoring needs, and clinical manage...

Learn about the losartan and amlodipine combination for blood pressure control, including the beneficial synergy and monitoring recommendati...

Melatonin and zolpidem together can increase sedation and CNS depression. Learn about risks, safety, and safer sleep management strategies.

Meloxicam can reduce lisinopril effectiveness and increase kidney injury risk. Learn how NSAIDs affect blood pressure medications and what t...

Learn about the meloxicam and warfarin drug interaction, including increased bleeding risk, management strategies, and safer alternatives.

Learn about the minor interaction between memantine and metformin via shared renal elimination, and when monitoring may be needed in elderly...

Learn about the interaction between metformin and amlodipine, including effects on blood sugar and blood pressure management.

Furosemide may increase metformin levels and dehydration risk, raising the concern for lactic acidosis. Learn about monitoring and safe mana...

Learn about combining metformin and canagliflozin for type 2 diabetes, including lactic acidosis risk, DKA, dehydration, and monitoring guid...

Learn about the moderate interaction between metformin and topiramate, including the increased risk of metabolic acidosis and monitoring rec...

Metformin and empagliflozin are frequently combined in type 2 diabetes. Learn about their interaction, cardiovascular benefits, and safety.

Metformin and dulaglutide are commonly combined in type 2 diabetes. Learn about their interaction, safety, and cardiovascular benefits.

Metformin and Zepbound (tirzepatide) may be combined in patients with obesity and type 2 diabetes. Learn about safety and monitoring.

Metformin and Saxenda (liraglutide 3.0 mg) may be used together in patients with obesity and type 2 diabetes. Learn about safety and managem...

Metformin and insulin lispro are combined in type 2 diabetes for basal-bolus support. Learn about hypoglycemia risk and safe management.

Metformin and cephalexin have a pharmacokinetic interaction that may modestly increase metformin levels. Learn about the clinical significan...

Naproxen can increase methotrexate levels and cause dangerous toxicity. Learn about the risks, monitoring needs, and safer alternatives.

Learn about the moderate interaction between methylphenidate and escitalopram, including serotonin considerations and monitoring tips.

Learn about the moderate interaction between metoprolol and amlodipine, including blood pressure and heart rate effects, and monitoring.

Learn about the moderate interaction between metoprolol and albuterol, where beta-blockers can reduce bronchodilator effectiveness.

Learn about combining metoprolol and lisinopril for blood pressure and heart failure, including hypotension risk and monitoring advice.

Metronidazole and clindamycin are sometimes combined for mixed anaerobic infections. Learn about interaction risks and clinical consideratio...

Mirtazapine and tramadol both increase serotonin and together raise the risk of serotonin syndrome. Learn about symptoms, management, and sa...

Learn about the mirtazapine and sertraline (California rocket fuel) combination, including serotonin syndrome risk, additive sedation, and m...

Montelukast and fluticasone are often combined for asthma and allergic rhinitis. Learn about their interaction, safety, and clinical use.

Learn about the montelukast and prednisone interaction for asthma and allergies, including complementary mechanisms and corticosteroid-spari...

Naltrexone blocks buprenorphine effects and can trigger severe precipitated withdrawal. Learn why this combination is contraindicated and ti...

Naproxen combined with warfarin greatly increases the risk of serious bleeding. Learn about the dangers, symptoms to watch for, and safer op...

Learn about the naproxen and rivaroxaban interaction, including significantly increased bleeding risk, management tips, and safer alternativ...

Understand the major interaction of dual RAAS blockade with olmesartan and ramipril, including hyperkalemia, hypotension, and renal failure ...

Learn why omeprazole reduces clopidogrel's effectiveness, increasing the risk of heart attack and stroke, and what alternatives exist.

Learn about the minor interaction between omeprazole and atorvastatin. Covers pharmacokinetic effects, clinical significance, and guidance.

Understand the major interaction between orlistat and warfarin. Orlistat reduces vitamin K absorption, potentially increasing INR and bleedi...

Learn about the minor interaction between oseltamivir (Tamiflu) and warfarin. Influenza illness itself can affect INR more than the antivira...

Learn about the pantoprazole and clopidogrel interaction, including reduced antiplatelet efficacy, CYP2C19 inhibition, and clinical manageme...

Paroxetine inhibits tamsulosin metabolism via CYP2D6, raising tamsulosin levels and risk of hypotension, dizziness, and falls. Learn about s...

Learn about combining pravastatin and valsartan for cardiovascular risk management. This common combination has no significant drug interact...

Prednisolone and ibuprofen together significantly increase the risk of GI bleeding and peptic ulcers. Learn about this major drug interactio...

Learn about the moderate interaction between prednisone and aspirin, including increased GI bleeding risk and protective strategies.

Learn about the minor interaction between prednisone and azithromycin, including QT prolongation awareness and why this combination is commo...

Learn about the serious GI bleeding risk when combining prednisone and ibuprofen. Includes management strategies and safer alternatives.

Understand how prednisone raises blood sugar and opposes metformin. Includes management strategies for diabetic patients on steroids.

Learn about the pregabalin and duloxetine interaction, including additive CNS depression, dizziness, and management strategies for pain pati...

Quetiapine and escitalopram together may prolong the QT interval and increase sedation. Learn about monitoring needs and safe use of this co...

Learn about the quetiapine and valproic acid interaction, including increased sedation, metabolic effects, and monitoring recommendations.

Rivaroxaban and aspirin together significantly increase bleeding risk. Learn when this combination is justified, monitoring needs, and how t...

Understand the major interaction between rizatriptan and venlafaxine. Combined serotonergic activity creates a risk of serotonin syndrome.

Learn about the rosuvastatin and amlodipine combination for cardiovascular risk, including the minimal interaction profile and co-prescribin...

Learn about the semaglutide and metformin drug interaction, including risks, management tips, and what to discuss with your doctor.

Ozempic combined with insulin glargine can lower blood sugar effectively but raises hypoglycemia risk. Learn how to manage this combination ...

Rybelsus (oral semaglutide) combined with insulin glargine increases hypoglycemia risk. Learn about safe use and dose management.

Wegovy (semaglutide) and metformin are sometimes used together for weight and diabetes management. Learn about safety and monitoring.

Understand the major interaction between sertraline and trazodone, including serotonin syndrome risk, symptoms to watch for, and monitoring.

Learn about the moderate interaction between sertraline and alprazolam, including sedation risks, pharmacokinetic effects, and monitoring.

Sertraline and tramadol together increase the risk of serotonin syndrome. Learn symptoms, severity, and safer alternatives for pain manageme...

Why sertraline and escitalopram should not be taken together. Learn about serotonin syndrome risk, symptoms, and safer alternatives.

Learn about the moderate interaction between sildenafil and atenolol, including additive blood pressure lowering and dizziness risks.

Learn about the sildenafil and amlodipine interaction, including additive blood pressure lowering, vasodilation risk, and safe management st...

Amlodipine increases simvastatin levels, raising the risk of rhabdomyolysis. Learn about dose limits, symptoms, and safer statin alternative...

Spironolactone and losartan together significantly raise the risk of dangerous hyperkalemia (high potassium). Learn about monitoring and pot...

Learn about the moderate interaction between sumatriptan and escitalopram, including the FDA serotonin warning and practical guidance.

Learn about the tadalafil and tamsulosin interaction for BPH, including additive hypotension risk, dosing considerations, and management str...

Learn about the moderate interaction between tiotropium and tolterodine due to additive anticholinergic effects, and how to manage concurren...

Tirzepatide and metformin are commonly combined for type 2 diabetes. Learn about their interaction, safety profile, and management.

Mounjaro (tirzepatide) and metformin are commonly combined in type 2 diabetes. Learn about their interaction, safety, and clinical guidance.

Valproic acid doubles lamotrigine levels, increasing the risk of life-threatening skin reactions. Learn about dose adjustments and monitorin...

Important safety information about combining venlafaxine and trazodone, including serotonin syndrome risk and monitoring guidelines.

Learn about the venlafaxine and sertraline interaction, including high serotonin syndrome risk, CYP2D6 inhibition, and why this combination ...

Understand the major interaction between warfarin and aspirin, including serious bleeding risks, monitoring requirements, and safer alternat...

Learn about the moderate interaction between warfarin and amoxicillin, how antibiotics can affect INR levels, and important monitoring steps...

Learn about the warfarin and azithromycin interaction, including how this antibiotic can raise INR and increase bleeding risk.

Learn how atorvastatin may increase warfarin anticoagulant effect, with INR monitoring guidance and management recommendations.

Metronidazole significantly increases warfarin levels, raising the risk of serious bleeding. Learn about monitoring, dose adjustments, and a...

Learn about the warfarin and acetaminophen interaction, including increased bleeding risk, INR monitoring, safe dosing, and when to contact ...

TMP-SMX (Bactrim) dramatically increases warfarin's anticoagulant effect. Learn about INR monitoring and safer antibiotic alternatives.

Ziprasidone and escitalopram both prolong the QT interval. Together they increase the risk of torsades de pointes. Learn about ECG monitorin...

Understand the major interaction between zolpidem and alprazolam, including severe CNS depression, respiratory risks, and alternatives.

Learn about the zolpidem and lorazepam interaction, including severe CNS depression risk, respiratory depression, and why this combination i...