Hepapro 25000 IU Injection 5 ml is used to prevent and treat deep vein thrombosis (blood clots in leg veins), pulmonary embolism (blood clots in the lung), stroke, Transient ischaemic attack (TIA), and heart attacks. It contains Heparin, which works by inhibiting the production of fibrin (a protein that binds platelets together and forms a clot), preventing blood clot formation. Some people may experience haemorrhage (bleeding), thrombocytopenia (low platelets), hypersensitivity reactions, and elevations of liver enzyme (aminotransferase) levels. Before taking this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.