Warfarin

210 interactions 9 explained in plain English
Also sold as: Coumadin Jantoven
Dr. Brian Staiger, PharmD, BCPS
Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Updated Jul 4, 2026 · Editorial policy · Data sources

Sources: FDA prescribing information (Structured Product Labeling), the published literature cited in each entry, DDInter 2.0 (a major open-access drug-interaction database), and legacy DrugBank interaction data distributed by the NIH's RxNav service (decommissioned in 2024) — analyzed and reviewed by our pharmacist team. How we build this library →

Moderate

Warfarin Acetaminophen And Codeine Capital® & Codeine Explained An increased risk of bleeding Details Warfarin Amitriptyline Elavil Explained An increased risk of bleeding Details Warfarin Acarbose Prandase® Explained An increased risk of bleeding Details Warfarin Acetaminophen Acephen An increased risk of bleeding Details Warfarin Acetaminophen Injection Acephen An increased risk of bleeding Details Warfarin Acetaminophen Rectal Acephen An increased risk of bleeding Details Warfarin Atenolol Tenormin Explained Risk of increased prothrombin time or INR Details Warfarin Atovaquone Mepron Increased INR Details Warfarin Atorvastatin Atorvaliq Increased warfarin exposure and an increased INR Details Warfarin Capsaicin Arthricare for Women Moisturizing Increased risk of bleeding Details Warfarin Capsaicin Topical Aspercreme Warming® Increased risk of bleeding Details Warfarin Capsaicin Transdermal Patch Aspercreme Warming® Patch Increased risk of bleeding Details Warfarin Cefazolin An increased risk of bleeding Details Warfarin Cefazolin Injection Ancef® An increased risk of bleeding Details Warfarin Cefotetan Injection Cefotan An increased risk of bleeding Details Warfarin Cephalexin Keflet® Tablets Increased INR and an increased risk of bleeding Details Warfarin Chloramphenicol Injection Chloromycetin® Injection An increased risk of bleeding Details Warfarin Cholestyramine Resin Locholest® Decreased effects of warfarin Details Warfarin Cisplatin Injection Platinol-AQ® Increased INR Details Warfarin Colesevelam Welchol Reduced INR results Details Warfarin Demeclocycline Declomycin® An increased risk of bleeding Details Warfarin Dexlansoprazole Dexilant Elevations in INR serum values and potentiation of anticoagulation effects Details Warfarin Disopyramide Norpace An increased risk of bleeding Details Warfarin Esomeprazole Nexium Elevations in INR values and potentiation of anticoagulation effects Details Warfarin Esomeprazole Injection Nexium Elevations in INR values and potentiation of anticoagulation effects Details Warfarin Exenatide Injection Bydureon An increased risk of bleeding and an increase in INR Details Warfarin Ezetimibe Zetia Risk of increased prothrombin time or INR Details Warfarin Felbamate Felbatol An increased risk of bleeding Details Warfarin Fludrocortisone Acetate Florinef® Increased risk of bleeding or diminished effects of warfarin Details Warfarin Fluoxymesterone Android-F® An increased risk of bleeding Details Warfarin Flutamide Eulexin An increased risk of bleeding Details Warfarin Fluvastatin Lescol Increased warfarin exposure, increased INR, and an increased risk of bleeding Details Warfarin Gefitinib Iressa Increased prothrombin time and INR values and an increased risk of bleeding Details Warfarin Glimepiride Amaryl Excessive hypoglycemia Details Warfarin Glipizide Glucotrol An increased risk of hypoglycemia Details Warfarin Golimumab Injection Simponi Increased warfarin exposure Details Warfarin Ibritumomab Injection Zevalin® An increased risk of bleeding and hemorrhage Details Warfarin Icosapent Ethyl Vascepa An increased risk of bleeding Details Warfarin Ifosfamide Injection Ifex An increased risk of bleeding Details

Check another drug

Still have questions about this combination?

Every question gets a real answer from a licensed pharmacist — free, and usually within a day.

Ask the pharmacist
Educational information only, not medical advice. Always confirm interactions with your pharmacist or prescriber before making any change to your medications.