Desmopressin (DDAVP) is an Endocrine Metabolic Agent used to treat symptoms of diabetes. It treats the production of an abnormally large amount of urine. Desmopressin is also used to control excessive passage of a large quantity of urine and abnormal thirst which may occur in case of a head injury or due to a particular types of surgery. In addition it is also used to control bed-wetting. Desmopressin works by replacing vasopressin, which is a hormone usually produced in the body that helps in balancing the amount of water and salt in the blood.