title: Respiratory depression: narcotic versus narcotic-tranquilizer combinations.
mesh_terms: D000328:Adult; D002245:Carbon Dioxide / Q000494:pharmacology; D004357:Drug Synergism; D006801:Humans; D006919:Hydroxyzine / Q000009:adverse effects / Q000494:pharmacology*; D006993:Hypnotics and Sedatives / Q000009:adverse effects / Q000494:pharmacology*; D008297:Male; D008614:Meperidine / Q000009:adverse effects / Q000494:pharmacology*; D010640:Phenothiazines / Q000009:adverse effects / Q000494:pharmacology*; D012119:Respiration / Q000187:drug effects*; D012146:Rest; D013147:Spirometry
chemical_list: D006993:Hypnotics and Sedatives; D010640:Phenothiazines; D002245:Carbon Dioxide; D006919:Hydroxyzine; D008614:Meperidine