Warfarin (Coumadin and Jantoven) is used for treating blood clots, which can occur if you have conditions like deep vein thrombosis (DVT) or pulmonary embolus (PE). What You Should Know About Your Diet and Warfarin What is warfarin? Warfarin is a medication that helps thin your blood to decrease your bodys chance of. Coumadin is a medication often described as a blood thinner it helps to prevent your blood from clotting too quickly or inappropriately. Why Vitamin K Can Be Dangerous if You Take Warfarin. Your diet affects how your medications work, especially for patients taking blood thinners such as. Warfarin (Coumadin ) and Your Diet How does what I eat affect warfarin? Foods that are high in vitamin K can affect the way warfarin works in your body. It is important to note that it isn't just what you eat that can thin your. Your doctor has prescribed the medicine warfarin (brand names Coumadin and Jantoven) for you. It is an anticoagulant (blood thinner) that makes your blood clot more. If you take warfarin, it is important that you use it safely and correctly, because bleeding is one of its main side effects. Living with warfarin means you will need. Warfarin, sold under the brand name Coumadin among others, is a medication that is used as an anticoagulant (blood thinner). It is commonly used to treat blood clots. Learn how UpToDate can help you. Select the option that best describes you Because being on warfarin can make you bleed more than usual: You should avoid activities that could cause an injury or open wound, such as contact sports. Vegetables are the primary source of vitamin K in the diet. Like liver, you do not need to eliminate these foods from your diet; just eat a consistent. S T A R T I N G O N W A R F A R I N What is warfarin? Warfarin is a prescription medicine that helps stop the blood from clotting. There are two brands of warfarin in.