To prevent blood clots which can lead to heart attacks and strokes, an anticoagulant drug called Warfarin ( name brands include Coumadin®, Jantoven®, Lawarin®, Marvin®, Waran® and Warfant® ) is often prescribed to “thin” your blood. According to the United States Food and Drug Administration, Warfarin is prescribed to over 2 million each year, but it is also one ...