| levorphanol | <chemical> A narcotic analgesic that may be habit-forming. It is nearly as effective orally as by injection. Pharmacological action: analgesics, opioid, narcotics. Chemical name: Morphinan-3-ol, 17-methyl- (12 Dec 1998) |
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| levorphanol tartrate | L-3-Hydroxy-N-methylmorphinan tartrate dihydrate;an analgesic similar in action to morphine. (05 Mar 2000) |