title: Heroin, morphine found comparable as pain-killer.
mesh_terms: D000700:Analgesics; D003932:Heroin / Q000008:administration & dosage / Q000627:therapeutic use*; D006801:Humans; D009020:Morphine / Q000008:administration & dosage; D009369:Neoplasms / Q000188:drug therapy*
chemical_list: D000700:Analgesics; D003932:Heroin; D009020:Morphine