<prompt> Tolvaptan is used forVon Willebrand DiseaseCatecholamine resistant ShockCentral DISIADH  <response>: Tolvaptan:- Tolvaptan is a selective Vasopressin V2 receptor antagonist indicated in treatment of euvolaemic or hypervolaemic hyponatremia Na 125mEqL or clinically symptomatic hyponatraemia, in spite of fluid restrictive corrective measures, including patients with Syndrome of Inappropriate ADH Secretion and Hea Failure. Bater and Schwaz criteria defines SIADH as follows: Ref:- Goodman Gilmans Pharmacological basis of Therapeutics 13th Ed; Pg Num:- 466 