title: The clinical testing of weak oral analgesics.
mesh_terms: D000284:Administration, Oral; D000700:Analgesics / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D004341:Drug Evaluation; D006801:Humans; D008614:Meperidine / Q000008:administration & dosage / Q000097:blood; D008691:Methadone / Q000008:administration & dosage / Q000097:blood; D008722:Methods; D009280:Naphthaleneacetic Acids / Q000008:administration & dosage / Q000097:blood; D010146:Pain / Q000145:classification / Q000188:drug therapy*; D013997:Time Factors
chemical_list: D000700:Analgesics; D009280:Naphthaleneacetic Acids; D008614:Meperidine; D008691:Methadone