<prompt> True statement about dezocine is:It is slower acting than morphineIt is less potent than morphineIt acts GABA receptorsIt doesnt increase histamine release  <response>: Ref: Goodman and Gilman 10e p602 Dezocine is slightly more potent and faster acting opioid than morphine with a similar duration of action. It is a paial agonist antagonist opioid. It is active at u receptors and side effect are similar to those of morphine. Dezocine doesnt increase plasma histamine and produces less hypotension than morphine or pentazocine. Dezocine is effective for moderate to severe pain but can cause myocardial depression. 