tolvaptan

Tolvaptan is a racemate comprising of equimolar amounts of (R)- and (S)-tolvaptan. It is a selective vasopressin V2 receptor antagonist used to treat euvolemic and hypervolemic hyponatremia. It is also used in the treatment of rapidly progressing autosomal dominant polycystic kidney disease to slow the rate of cyst development and renal insufficiency. It has a role as an aquaretic and a vasopressin receptor antagonist. It contains a (S)-tolvaptan and a (R)-tolvaptan.