Heparin sodium is an anticoagulant and a mucopolysaccharide. It is the sodium salt of glucosamine sulfate extracted from the intestinal mucosa of pigs, cattle and sheep. It is secreted by mast cells in the human body and naturally exists in the blood. Heparin sodium can prevent platelet aggregation and destruction, inhibit fibrinogen from transforming into fibrin monomer, inhibit the formation of thromboplastin, and antagonize platelet aggregation and destruction.