title: Hydroxyzine as an adjunct to preanesthetic medication.
mesh_terms: D000328:Adult; D000368:Aged; D001285:Atropine / Q000008:administration & dosage; D002986:Clinical Trials as Topic; D005260:Female; D006801:Humans; D006919:Hydroxyzine / Q000008:administration & dosage*; D008297:Male; D008614:Meperidine / Q000008:administration & dosage; D008875:Middle Aged; D009020:Morphine / Q000008:administration & dosage; D011229:Preanesthetic Medication
chemical_list: D006919:Hydroxyzine; D009020:Morphine; D001285:Atropine; D008614:Meperidine