ADH is produced by the part of the brain that monitors water levels in the blood. It is then carried in the blood to its target organ – the kidneys. When the brain detects lower than normal ...
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.