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    Information about Warfarin

    Warfarin uses

    Warfarin is used for prevention of blood clots. It is used to prevent and treat blood clots forming in the legs, lungs, brain or heart.

    How warfarin works

    Warfarin is an oral anticoagulant. It acts by preventing the formation of harmful blood clots. Although it does not dissolve the existing blood clots, it inhibits them from growing larger and causing serious problems.

    Common side effects of warfarin


    Available Medicine for Warfarin

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    Expert advice for Warfarin

    • Good medication for preventing blood clots.
    • For best results, take Warfarin at the same time every day.
    • Requires regular blood test (PT-INR), to make sure Warfarin is working properly.
    • Warfarin increases your risk of bleeding. Be careful while shaving, cutting fingernails or toenails, using sharp objects or engaging in contact sports (e.g. football, wrestling).
    • Notify your doctor if you see blood in your vomit, urine or stool (black, tarry stools or bright red blood).
    • Interacts with food or other medicines; hence require frequent dose changes.
    • If you are going to have a surgery or dental treatment, you may be asked to stop taking Warfarin temporarily.
    • Warfarin should not be used in the pregnancy. You may breastfeed.
    • Inform your doctor if you have ever been diagnosed with kidney or liver problems.

    Frequently asked questions for Warfarin


    Q. Is warfarin an anti-platelet or a beta-blocker drug?

    No. Warfarin is not an anti-platelet or beta blocker. It is an anti-coagulant drug

    Q. Is Warfarin safer than Xarelto?

    Both warfarin and Xarelto (rivaroxaban) are equally safe in the treatment of blood clotting. More precaution required while using these drugs. Always follow the advice of the doctor regarding its use

    Q. How long can I take warfarin for?

    Warfarin should only be taken for the duration prescribed by your doctor

    Q. Is warfarin safe?

    Yes. Warfarin is relatively safe if used as recommended. In case of any side-effects, consult your doctor

    Q. What can I take for pain/cold if I am taking warfarin?

    Please consult your doctor for medicines to be taken with warfarin in case of pain or cold

    Q. Can I take warfarin with aspirin, tramadol, Viagra, Tylenol, ibuprofen, or glucosamine?

    Warfarin may react with aspirin, tramadol, Viagra, Tylenol, ibuprofen or glucosamine. Please consult your doctor before use

    Q. Does warfarin cause constipation, fatigue, headache, or weight gain?

    Warfarin may cause constipation, fatigue, headache, or weight gain. If you experience any such symptoms, please consult your doctor.

    Q. Can I take Warfarin with Betahistine?

    Warfarin and Betahistine can be taken together. No harmful side effects or any other clinical interactions have been seen when the two drugs are taken together.

    Q. Can I take Warfarin with sildenafil?

    Warfarin can be taken with Sildenafil , no significant drug interactions have been seen between the two. However, there have been some clinical reports of penile fracture in patients using sildenafil with Warfarin. Inform your doctor before taking the two drugs together.

    Content on this page was last updated on 30 April, 2018, by Dr. Varun Gupta (MD Pharmacology)