Vasopressin, also known as antidiuretic hormone (ADH), has two main functions ... Chief among these is the body's sleep-wake cycle. Without circadian rhythms, the body's ability to maintain ...

Antidiuretic hormone normally increases during sleep, reducing urine production to its lowest levels during the middle portion of your sleep cycle. Disruptions to this rhythm often manifest as ...

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.