Decreases the clotting ability of the blood.
Helps prevent harmful clots from forming in the blood vessels or on mechanical heart valves.
Is commonly given to patients who have mechanical heart valves, stents in the pulmonary artery or chronic atrial flutter. Give this medicine only in the amount your doctor orders. There are 8 different strengths of Coumadin tablets. Each tablet has a number on it and is a different color. You may not give the same dose each day.