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.

Sometimes, people with vasopressin deficiency self-administer it. Vasopressin, also known as antidiuretic hormone (ADH), has two main functions: reducing the amount of urine released by the ...

Hormonal changes You age and hormones play a big role in this night-walker. Less ADH could be one of the reasons why nocturia occurs. As we age, the body makes less antidiuretic hormone (ADH ...

Somatotroph Adenomas: These tumors secrete excess growth hormone, leading to abnormal hormone (ADH) production, leading to ...

The reabsorption of water back into the blood (at the medulla) is controlled by the anti-diuretic hormone (ADH). ADH is produced by the part of the brain that monitors water levels in the blood.

In this video, Greg Foot explains the role of the hormone ADH on the permeability of the kidney tubules - regulating the water levels in the body.