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Coumadin Patient Information including If I Miss a Dose
In this Article
- What is warfarin (Coumadin)?
- What are the possible side effects of warfarin (Coumadin)?
- What is the most important information I should know about warfarin (Coumadin)?
- What should I discuss with my healthcare provider before taking warfarin (Coumadin)?
- How should I take warfarin (Coumadin)?
- What happens if I miss a dose (Coumadin)?
- What happens if I overdose (Coumadin)?
- What should I avoid while taking warfarin (Coumadin)?
- What other drugs will affect warfarin (Coumadin)?
- Where can I get more information?
What happens if I miss a dose (Coumadin)?
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose (Coumadin)?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
Overdose can cause excessive bleeding.
What should I avoid while taking warfarin (Coumadin)?
Ask your doctor before taking any medicine for pain, arthritis, fever, or swelling. This includes acetaminophen (Tylenol), aspirin, celecoxib (Celebrex), ibuprofen (Advil, Motrin), diclofenac (Cataflam, Voltaren), indomethacin (Indocin), naproxen (Aleve, Naprosyn), piroxicam (Feldene), and others. These medicines may affect blood clotting and may also increase your risk of stomach bleeding.
Do not eat large amounts of foods high in vitamin K (such as liver, leafy green vegetables or vegetable oils). Vitamin K can make warfarin less effective. Avoid making any changes in your diet without first talking to your doctor.
Grapefruit and grapefruit juice may interact with warfarin and lead to unwanted side effects. Discuss the use of grapefruit products with your doctor.
What other drugs will affect warfarin (Coumadin)?
Many drugs (including some over-the-counter medicines and herbal products) can cause serious medical problems or death if you take them with warfarin. Not all possible drug interactions are listed in this medication guide. It is very important to tell your doctor about all medicines you have recently used, especially:
- any other medications to prevent blood clots;
- an antibiotic, antifungal medication, sulfa drug, or medicine to treat tuberculosis;
- an antidepressant such as citalopram (Celexa), fluoxetine (Prozac, Rapiflux, Sarafem, Selfemra, Symbyax), paroxetine (Paxil, Pexeva), sertraline (Zoloft), and others;
- antifungal medications such as fluconazole (Diflucan), miconazole (Monistat, Oravig), voriconazole (Vfend), and others;
- herbal (botanical) products including coenzyme Q10, cranberry, echinacea, garlic, ginkgo biloba, ginseng, goldenseal, or St. John's wort;
- secobarbital (Seconal) and others barbiturates; or
- seizure medication such as carbamazepine (Carbatrol, Equetro, Tegretol), phenobarbital (Solfoton), phenytoin (Dilantin).
This list is not complete and many other drugs can interact with warfarin. This includes prescription, over-the-counter, vitamin, and herbal products. Give a list of all your medicines to any healthcare provider who treats you.
Where can I get more information?
Your pharmacist can provide more information about warfarin.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
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Additional Coumadin Information
- Coumadin Drug Interactions Center: warfarin oral
- Coumadin Side Effects Center
- Coumadin Overview including Precautions
- Coumadin FDA Approved Prescribing Information including Dosage
Coumadin - User Reviews
Coumadin User Reviews
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Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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