Treatment of hepatitis, cirrhosis, cerebral infarction, diabetes, impotence, respiratory diseases. It has anti fibrotic effect on child a and B patients with mild liver function damage, especially on child a patients. It is used for induction of labor, induction of labor, renal insufficiency, treatment of mumps, pancreatitis, etc. Prostaglandin E1 for injection is mainly used in myocardial infarction, heart failure, thromboangiitis, chronic arterial occlusion, central retinal vein thrombosis, cardiopulmonary bypass to protect platelets, arteriography, vascular reconstruction surgery, etc.