What is the main function of warfarin?

Warfarin is primarily used as an anticoagulant, meaning its main function is to prevent the formation of blood clots. It achieves this by inhibiting the synthesis of vitamin K-dependent clotting factors in the liver. This makes it particularly effective for patients who are at risk for thromboembolic events, such as those with atrial fibrillation, deep vein thrombosis, or pulmonary embolism. By preventing these clots, warfarin helps reduce the risk of serious conditions such as strokes or heart attacks that can occur when clots obstruct blood flow. This function is essential in managing and preventing conditions that arise from abnormal blood clotting.