Narcotic drugs.
D000701:Analgesics, Opioid / Q000009:adverse effects / Q000378:metabolism / Q000627:therapeutic use*; D004361:Drug Tolerance; D006801:Humans; D007700:Kinetics; D009020:Morphine / Q000009:adverse effects / Q000627:therapeutic use; D010146:Pain / Q000188:drug therapy*; D013997:Time Factors
D000701:Analgesics, Opioid; D009020:Morphine