<prompt> True about Dezocine -Slower acting than morphineLess potent than morphineActs GABADoesnt increase histamine release  <response>: Ans. is d i.e., Doesnt increase histamine release Dezocine Dezocine is an opioid agonist-antagonist. o Its analgesic potency, onset and duration of action in the relief of postoperative pain are comparable to morphine. o It has no effect on histamine and catecholamines secretion. o Like other agonist-antagonist it exhibits ceiling effect for respiratory depression. It has a high affinity for receptors and moderate affinity for 8 receptors. 