title: Is heroin needed for cancer pain?
mesh_terms: D005260:Female; D003932:Heroin / Q000008:administration & dosage / Q000627:therapeutic use*; D006801:Humans; D007880:Legislation, Drug; D008297:Male; D009020:Morphine / Q000627:therapeutic use; D009369:Neoplasms / Q000503:physiopathology*; D010146:Pain / Q000188:drug therapy*; D012106:Research; D014481:United States
chemical_list: D003932:Heroin; D009020:Morphine