Tolvaptan is a vasopressin receptor antagonist. Vasopressin (a.k.a. ADH or antidiuretic hormone) helps to regulate water retention by absorbing water in the collecting ducts of the nephron.

SIADH, as its name suggests, is an inappropriate secretion of antidiuretic hormone (ADH). ADH is a hormone that helps control your sodium concentration and your blood pressure by adjusting the ...

ADH increases the number of _____ inserted into the cell membrane of kidney cells in the collecting ducts to increase water reabsorption. Check Functions of the hormone _____ secreted from the ...