Inhibitors of fibrinolysis inhibit fibrinolysis by competitive inhibition plazminogenaktiviruyuschego enzyme and inhibit the formation of plasmin (aminocaproic acid, aminometilbensana acid, etc.) or by complexation with plasmin (Aprotinin). Regardless of the mechanism of inhibition of fibrinolysis they have a specific hemostatic effect in various pathological conditions in which increased fibrinolytic activity of blood and tissues, as well as in surgical operations.