Using this medicine with any of the following may cause an increased risk of certain side effects but may be unavoidable in some cases. If used together, your doctor may change the dose or how often you use this medicine, or give you special instructions about the use of food, alcohol, or tobacco. Coumadin (Warfarin Sodium) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. Warfarin, sold under the brand name Coumadin among others, is used as an anticoagulant medication. [11][8] It is commonly used to prevent deep vein thrombosis and pulmonary embolism, and to protect against stroke in people who have atrial fibrillation, valvular heart disease, or artificial heart valves. [11] Medscape - Deep vein thrombosis, pulmonary embolism, recurrent myocardial infarction-specific dosing for Coumadin, Jantoven (warfarin), frequency-based adverse effects, comprehensive. Coumadin package insert / prescribing information for healthcare professionals. Includes: indications, dosage, adverse reactions and pharmacology. Warfarin may cause serious bleeding that can lead to death. Warfarin (Coumadin® and Jantoven®) is an anticoagulant medication or “blood thinner” you take to prevent and treat blood clots that can lead to a stroke or heart attack. Warfarin slows down your blood’s ability to clot. Overview: Warfarin is used to help prevent and treat blood clots, as well as complications from blood clots. It also helps lower the risk of complications after a heart attack. The most common side. Coumadin is used to prevent heart attacks, strokes, and blood clots in veins and arteries. Learn about side effects, interactions and indications. COUMADIN can cause bleeding which can be serious and sometimes lead to death. This is because COUMADIN is a blood thinner medicine that lowers the chance of blood clots forming in your body.