Preliminary observations on the effect of levallorphan on respiratory depression and analgesia of levorphan in man.
D000698:Analgesia; D006801:Humans; D007977:Levallorphan; D007981:Levorphanol; D008297:Male; D009022:Morphine Derivatives; D010146:Pain; D059408:Pain Management; D012131:Respiratory Insufficiency
D009022:Morphine Derivatives; D007981:Levorphanol; D007977:Levallorphan
MORPHINE/derivatives