Dezocine (Dalgan, WY16225) is an opioid analgesic. First synthesized in 1970, it acts at mu-, delta-, and kappa-opioid receptors. Dezocine acts as a mixed agonist/antagonist of opioid receptors. It is related to other benzomorphans such as pentazocine, with a similar profile of effects that include analgesic action and euphoria. Unlike many other benzomorphans however, it is a silent antagonist of the κ-opioid receptor, and in accordance, does not produce side effects such as dysphoria or hallucinations at any dose.
