<prompt> Drug not used in SIADH is:DemeclocyclineDesmopressinRestriction of free water intake3 NaCl  <response>: Desmopressin is ADH and will exacerbates the symptoms of SIADH. Hypeonic saline 3NaCl is used for severely symptomatic patients with hyponatremia. Demeclocycline decreases the release of ADH. 