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Warfarin side effects: Watch for interactions

Less serious warfarin side effects to tell your doctor about What warfarin side effects should you watch for? Warfarin side effects that require immediate medical attention Less-serious warfarin side effects to tell your doctor about What precautions can you take against warfarin side effects? What drugs and supplements can interact with warfarin? What foods and drinks might interact with warfarin? Content When is warfarin prescribed? What are the side effects of warfarin? What can increase the risk of bleeding? What drugs, supplements and foods interact with warfarin? What does vitamin K have to do with warfarin? What can you do to lower the risk of bleeding? What should you do if you forget a dose?

What drugs, supplements and foods interact with warfarin?

Like any other medication, warfarin can interact with certain foods, drugs, vitamins or herbal supplements. An interaction might lower the effectiveness of warfarin or increase your risk of bleeding.

Common drugs that can interact with warfarin include:

  • Aspirin or aspirin-containing products
  • Acetaminophen (Tylenol, others) or acetaminophen-containing products
  • Antacids or laxatives
  • Many antibiotics
  • Antifungal medications, such as fluconazole (Diflucan)
  • Cold or allergy medicines
  • Ibuprofen (Advil, Motrin IB, others) or naproxen sodium (Aleve, Naprelan, others)
  • Medications that treat abnormal heart rhythms, such as amiodarone (Pacerone, Nexterone)

Common supplements that can interact with warfarin include:

  • Coenzyme Q10 (ubiquinone)
  • Dong quai
  • Garlic
  • Ginkgo biloba
  • Ginseng
  • Green tea
  • St. John's wort
  • Vitamin E

Common foods and drinks that might interact with warfarin include:

  • Cranberries or cranberry juice
  • Grapefruit
  • Alcohol
  • Garlic
  • Black licorice

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