This drug is a precursor of lysine vasopressin. It is inactive by itself and acquires the physiological activity of vasopressin after being slowly converted into lysine vasopressin in the body. A proper amount of this drug can reduce portal blood pressure, but it will not significantly change arterial blood pressure like vasopressin, nor will it increase the dissolution of fibrin.

Inhibits the secretion of growth hormone, thyroid stimulating hormone, insulin and glucagon, and inhibits the secretion of gastric acid; affects the absorption, motility, visceral blood flow and nutritional function of the gastrointestinal tract; inhibits the secretion of gastrin, gastric acid and pepsin, and is used to treat upper gastrointestinal bleeding; reduces the blood flow to visceral organs without significantly changing the systemic arterial blood pressure, and is suitable for the treatment of esophageal varicose bleeding; reduces the endocrine and related functions of the pancreas.

No specific pharmacological effects mentioned

It stimulates the contraction of uterine smooth muscles, simulates the contraction of uterus during normal delivery, and causes cervical dilation; it stimulates the contraction of mammary smooth muscles, which helps milk to be discharged from the breast, but does not increase the amount of milk secretion from the mammary gland.