<prompt> In a patient if administration of vasopressin does not increase the osmolality of urine, it indicates?ADH deficienyRenal hyposensitivity towards ADHSIADHPsychogenic polydipsia  <response>: Renal hyposensitivity towards ADH REF: Harrisons 17th ed p. 274 If the osmolality of urine increases after administration of ADH - Nephrogenic DI Renal hyposensitivity If the osmolality of urine decreases after administration of ADH- Central DI 