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Warfarin side effects: Watch for interactions

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Warfarin (Jantoven) is a medicine to prevent blood clots. It may save your life if you've had blood clots or are at risk of them. But warfarin can sometimes cause serious side effects, such as heavy bleeding. It's important to have regular health checkups if you take the medicine.

The same action of warfarin that stops blood from clotting can cause bleeding. Warfarin treatment is a careful balance. Diet changes, being sick, and using some medicines, herbs or supplements can change the levels of the medicine in the body.