title: The phenomenon of analgesic tolerance in cancer pain management.
mesh_terms: D000701:Analgesics, Opioid / Q000493:pharmacokinetics / Q000627:therapeutic use*; D004361:Drug Tolerance; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000503:physiopathology*; D010146:Pain / Q000188:drug therapy* / Q000503:physiopathology
chemical_list: D000701:Analgesics, Opioid