is an antifibrinolytic agent that reversibly blocks lysine binding sites on plasminogen and plasmin, and acts to prevent proteolytic degradation of fibrin clots which form in the normal physiologic process of hemostasis. Both plasminogen and plasmin are activators of fibrinolysis and active clot-lysing agents. Tranexamic acid thus helps to stabilize fibrin clots, which in turn maintains coagulation and helps to control bleeding