title: Demand method evaluation of analgesics.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000700:Analgesics / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D004305:Dose-Response Relationship, Drug; D004341:Drug Evaluation / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000188:drug therapy; D010919:Placebos; D011427:Propiophenones / Q000008:administration & dosage / Q000627:therapeutic use; D013993:Tilidine / Q000627:therapeutic use
chemical_list: D000700:Analgesics; D010919:Placebos; D011427:Propiophenones; D013993:Tilidine