title: Rational choice of preoperative medication: the emperor's new clothes?
mesh_terms: D003975:Diazepam / Q000494:pharmacology; D005239:Fear / Q000187:drug effects; D006801:Humans; D006919:Hydroxyzine / Q000494:pharmacology; D008614:Meperidine / Q000494:pharmacology; D010919:Placebos; D011229:Preanesthetic Medication; D011300:Preoperative Care
chemical_list: D010919:Placebos; D006919:Hydroxyzine; D008614:Meperidine; D003975:Diazepam