About Tinzaparin Low Molecular Weight Heparin, Anticoagulant. Mechanism of Action of Tinzaparin Tinzaparin is an anticoagulant. It is a low molecular weight heparin that binds to and accelerate the activity of antithrombin III.This produces inactivation of factor Xa and thrombin and prevents the formation of blood clots.Binding of Tinzaparin with Heparin cofactor II also inhibits thrombin activity and produces anticoagulant effect. Indications for Tinzaparin 1.To prevent deep venous thrombosis