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Medical Definition of Nalbuphine hydrochloride
1. 17-(Cyclobutylmethyl)4,5a-epoxymorphinan-3,6a,14-triol hydrochloride;a synthetic opioid analgesic chemically related to oxymorphone, a narcotic, and to naloxone, a narcotic antagonist, with both agonist and antagonist narcotic properties. (05 Mar 2000)