title: Subjective responses to six common preoperative medications.
mesh_terms: D002986:Clinical Trials as Topic; D003975:Diazepam; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D004341:Drug Evaluation; D005239:Fear / Q000187:drug effects; D006801:Humans; D006919:Hydroxyzine; D008614:Meperidine; D009020:Morphine; D010424:Pentobarbital; D010919:Placebos; D011229:Preanesthetic Medication; D012631:Secobarbital
chemical_list: D010919:Placebos; D012631:Secobarbital; D006919:Hydroxyzine; D009020:Morphine; D008614:Meperidine; D010424:Pentobarbital; D003975:Diazepam