Warf 1 mg tablet is an anticoagulant that contains Warfarin Sodium. Warf 1 is primarily used to prevent and treat deep vein thrombosis and pulmonary embolism by reducing the formation of a blood clot. Deep vein thrombosis is a medical condition in which blood clots form in deep veins usually in the legs. Pulmonary embolism is a condition in which blood clot blocks the arteries in the lungs. Close monitoring of liver and kidney function is necessary while receiving this medicine due to an increase in the risk of bleeding.