The narcotic analgesics.
D000701:Analgesics, Opioid / Q000008:administration & dosage* / Q000009:adverse effects / Q000494:pharmacology; D006801:Humans; D009892:Opium / Q000008:administration & dosage; D010146:Pain / Q000188:drug therapy*
D000701:Analgesics, Opioid; D009892:Opium