title: Comparison of the hypnotic effectiveness of secobarbital, pentobarbital, methyprylon and ethchlorvynol.
mesh_terms: D000367:Age Factors; D000368:Aged; D002986:Clinical Trials as Topic; D004984:Ethchlorvynol / Q000627:therapeutic use*; D006801:Humans; D006993:Hypnotics and Sedatives / Q000627:therapeutic use*; D010424:Pentobarbital / Q000627:therapeutic use*; D010919:Placebos; D012631:Secobarbital / Q000627:therapeutic use*; D007319:Sleep Initiation and Maintenance Disorders / Q000188:drug therapy*
chemical_list: D006993:Hypnotics and Sedatives; D010919:Placebos; D012631:Secobarbital; D004984:Ethchlorvynol; D010424:Pentobarbital