Post-operative pain relief: comparison of methadone and morphine when used concurrently with nitrous-oxide analgesia.
D006801:Humans; D008691:Methadone / Q000627:therapeutic use*; D009020:Morphine / Q000627:therapeutic use*; D009609:Nitrous Oxide / Q000627:therapeutic use*; D010146:Pain / Q000188:drug therapy*; D011182:Postoperative Care
D009020:Morphine; D009609:Nitrous Oxide; D008691:Methadone