warfarin side effect
A: Coumadin (warfarin) is an anticoagulant (blood thinner) that reduces the formation of blood clots. It is used to prevent heart attacks, strokes, and blood clots in veins and arteries. Common side effects of warfarin include nausea, vomiting, stomach pain, gas, and bloating. Bleeding may also occur with Coumadin. Signs of bleeding include nose bleeds, bleeding gums, unusual or easy bruising, cuts that won't heal, and dark urine or stool.