title: Spinal narcotics and respiratory depression.
mesh_terms: D000368:Aged; D000698:Analgesia / Q000009:adverse effects*; D000775:Anesthesia, Spinal / Q000009:adverse effects*; D003864:Depression, Chemical; D005260:Female; D006801:Humans; D007040:Hypoventilation / Q000139:chemically induced*; D007278:Injections, Spinal; D008297:Male; D009020:Morphine / Q000008:administration & dosage*; D010149:Postoperative Pain / Q000188:drug therapy; D012125:Respiratory Center / Q000187:drug effects
chemical_list: D009020:Morphine