Anticoagulant drugs are drugs commonly used in clinical prevention and treatment of thrombotic diseases. The anticoagulant drugs commonly used in clinical practice are as follows: a. Aspirin, which is one of the most commonly used drugs to resist platelet aggregation, plays the role of inhibiting platelet aggregation by inhibiting the formation of arachidonic acid. It is commonly used clinically for the treatment and prevention of coronary heart disease, cerebral thrombosis and other diseases. Bolivar, by inhibiting the synthesis of ADP, thus inhibiting the aggregation of platelets, is commonly used clinically in the prevention of serious cardiovascular and cerebrovascular embolic diseases later. Warfarin, a commonly used oral anticoagulant drug, plays an anticoagulant role by inhibiting the absorption of vitamin K. It is often used clinically in rheumatic diseases. It is often used clinically in patients with rheumatic valve disease and anticoagulation therapy after surgery. Fourth, heparin class, there are ordinary heparin and low molecular weight heparin, clinically often used in thrombotic disease thrombolytic therapy.