Has a hemostatic effect.The drug group vitamin K, Increases blood clotting by increasing the production of liver factors II, VII, IX, X.The effect is manifested 12-18 hours after the / m administration. In the blood, prothrombin (factor II) in the presence of thromboplastin and calcium ions, with the participation of Procon-vertine (factor VII) factors IX and X enters thrombin, under the influence of which fibrinogen turns into fibrin, which forms the basis of a blood clot (thrombus). With a deficiency of vitamin K, the synthetic homologue of which is menadione, there is increased bleeding. Substrate K-vitaminreduktazu stimulate, the activation of vitamin K and ensures its participation in the hepatic synthesis of K-vitaminozavisimyh plasma hemostasis factors. After the / m introduction is easily and quickly absorbed.