Prescription onlyLower-cost generic availableClass: Cardiovascular



Prescription onlyLower-cost generic availableClass: Cardiovascular
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Prevents blood clots.

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Our bottom line

Coumadin (warfarin) is a cheap and effective medicine that prevents new blood clots. It requires regular blood tests and you'll need to eat, exercise, and take your medicines consistently.

Price and discounts
Best available price for 30 (5mg) tablets of warfarin


  • Coumadin (warfarin) is available as a generic, so it should be less expensive than the brand version.
  • In case you start bleeding too much while using Coumadin (warfarin), your doctor can give you another drug that reverses Coumadin (warfarin)'s effects.
  • Coumadin (warfarin) comes in numerous strengths.
  • Coumadin (warfarin) has been around for a long time and is one of the most commonly used 'blood thinner' medicines.
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  • Raises your risk of bleeding and bruising.
  • Requires regular blood work, such as an INR, to make sure Coumadin (warfarin) is working correctly.
  • Your daily dose of Coumadin (warfarin) can change if you change your diet, exercise patterns, or use of alcohol.
  • A lot of other drugs and supplements interact with Coumadin (warfarin), so you'll need to check with your doctor or pharmacist before starting any new medicines.
How it works

Coumadin (warfarin) prevents blood clots from forming. It doesn't break up clots that already exist. It can only stop new ones from forming or old ones from getting bigger.

What to expect when you take Coumadin (warfarin) for Anticoagulant

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Side effect rates for Coumadin (warfarin)

Risks and Warnings for Coumadin (warfarin)

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    • Higher risk if:
    • Coumadin (warfarin) dose too high
    • Age greater than 65 year
    • History of stomach bleeding
    • High blood pressure
    • Kidney or liver problems
    • Drug interactions
    • Change in lifestyle or diet
    • Alcohol use
    • Certain genetic factors

    Your doctor will work with you to find a dose of Coumadin (warfarin) that works best for you. It's important to follow-up with your doctor or pharmacist to make sure it's working well and that you're taking the best possible dose. Rarely, Coumadin (warfarin) can cause unusual bleeding that can be life-threatening. Get immediate medical attention if you can't stop bleeding, fall and hit your head, notice blood in your urine, or have bright red or dark, tarry "coffee ground" stool.

    This is a black box warning. The FDA requires this warning when there is a significant risk of serious or life-threatening effects that anyone taking the drug should consider.

Means that some groups have a high risk of experiencing this side effect

Common concerns from people taking Coumadin (warfarin)

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  • A lot of other drugs and supplements interact with Coumadin (warfarin), so you'll need to check with your doctor or pharmacist before starting any new medicines.
  • Coumadin (warfarin) interacts with many drugs and supplements. This can increase your risk of bleeding or of developing a new blood clot. If you start a new medication or change your diet, let your doctor know so they can change your dose if necessary.