- Warfarin is used to prevent unwanted clots from forming if you have a condition that puts you at risk of this happening, such as atrial fibrillation – a fast, irregular heart beat. It is also used to prevent any clots that may have already formed in your blood vessels from becoming larger and causing problems.
- Warfarin works by reducing the action of Vitamin K, which is important in blood clotting.
- Warfarin is one of a family of medicines called Anticoagulants.
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