Methorphinan as a supplementary anaesthetic medium.
D000698:Analgesia; D000758:Anesthesia; D000760:Anesthesia and Analgesia; D000777:Anesthetics; D009022:Morphine Derivatives; D009609:Nitrous Oxide; D059408:Pain Management
D000777:Anesthetics; D009022:Morphine Derivatives; D009609:Nitrous Oxide
MORPHINE/derivatives; NITROUS OXIDE/anesthesia and analgesia