Warfarin is an anticoagulant medication commonly prescribed to prevent blood clots. It works by inhibiting the action of vitamin K, which is essential for blood clotting. Patients often take Warfarin to reduce the risk of stroke, heart attack, or other serious conditions related to blood clots. Monitoring is crucial while on Warfarin, as its effectiveness can be influenced by diet, other medications, and individual health factors. Regular blood tests, known as INR tests, help ensure that the dosage remains within a safe and effective range, minimizing the risk of bleeding complications.