Coumadin (generic: warfarin) is a prescription medication used to lower the chances of blood clots forming in your body due to various causes. Coumadin belongs to a group of drugs called anticoagulants or "blood thinners". It helps prevent blood clots from forming by decreasing the formation of substances in the blood known as clotting factors. Careful monitoring of side effects is required using regular blood tests.

This medication comes in tablet form. It is also available in an injectable form to be infused into a vein by a healthcare provider at a hospital or other medical facility. Coumadin is usually taken once daily, with or without food. The dosage will vary depending on the results of your PT/INR test (blood test).

Common side effects of Coumadin are nausea, vomiting, and an altered sense of taste. Seek medical attention if you experience bruising or bleeding.