<prompt> All are causes of acute hyponatremia exceptTURP surgeryExerciseRecent institution of thiazidesSIADH  <response>: Causes of Acute Hyponatremia Iatrogenic Postoperative: premenopausal women Hypotonic fluids with cause of vasopressin Glycine irrigation: TURP, uterine surgery Colonoscopy preparation Recent institution of thiazides Polydipsia MDMA ecstasy, Molly ingestion Exercise-induced Multifactorial, e.g., thiazide and polydipsia Ref: Harrison 19e pg: 301 