heparin sodium, an anticoagulant. ▪ INDICATIONS: It is prescribed in the treatment and prophylaxis of a variety of thromboembolic disorders. It inhibits blood clotting and prevents recurring coronary artery occlusion. ▪ CONTRAINDICATIONS: Known hypersensitivity to this drug prohibits its use. It is given only when frequent monitoring of the coagulation status of the patient’s blood is possible. ▪ ADVERSE EFFECTS: The most serious adverse reaction is hemorrhage. Vasospastic disorders may occur.