Argatroban is an anticoagulant medication used to prevent and treat blood clots. It works by inhibiting a protein called thrombin, which plays a key role in the blood clotting process. This helps reduce the risk of serious conditions like deep vein thrombosis and pulmonary embolism. Typically administered through an intravenous (IV) line, argatroban is often used in patients who have a history of heparin-induced thrombocytopenia, a condition where the body reacts negatively to another anticoagulant called heparin. Regular monitoring of blood clotting levels is essential during treatment to ensure safety and effectiveness.