What is an antidiuretic hormone (adh) test?
Definition Antidiuretic hormone (ADH) test, also called the Vasopressin test, is a test for the antidiuretic hormone, which is released from the pituitary gland and acts on the kidneys to increase their reabsorption of water into the blood. Purpose An ADH test is used to aid in the diagnosis of diabetes insipidus or the syndrome of inappropriate ADH called SIADH. Precautions Certain drugs can either increase or decrease ADH levels. Drugs that increase ADH levels include acetaminophen, barbiturates, cholinergic agents, estrogen, nicotine, oral hypoglycemia agents, some diuretics (e.g., thiazides), cyclophosphamide, narcotics, and tricyclic antidepressants. Drugs that decrease ADH levels include alcohol, beta-adrenergic agents, morphine antagonists, and phenytoin (Dilantin). Description The purpose of ADH is to control the amount of water reabsorbed by the kidneys. Water is continually being taken into the body in food and drink, as well as being produced by chemical reactions in cells.
