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Warfarin (also called Coumadin®) is an anticoagulant. “Anti” means against and “coagulant” refers to blood clotting. An anticoagulant helps to reduce clots from forming in the blood. Warfarin is used to treat harmful blood clots (thrombosis) in veins or arteries or to prevent blood clots from coming back. It is also used to prevent blood clots from forming after certain surgeries or periods of inactivity or with artificial heart valves.
Warfarin is available as tablets in several strengths. All are taken by mouth. Below is a list of the tablet strengths and their colors:
Symptoms of an allergic reaction include: rash, hives, itching, chills, fever, headache, muscle ache, shortness of breath, coughing, tightness in the throat, swelling of the face or neck.
Not all patients who take warfarin will experience these side effects. Common side effects are bolded, but there may be others. Please report all suspected side effects to your doctor or pharmacist.
Find more information on side effects.
Be sure to discuss all questions and instructions with your doctor or pharmacist.