title: Biphasic depression of ventilatory responses to CO2 following epidural morphine.
mesh_terms: D000328:Adult; D001416:Back Pain / Q000188:drug therapy; D002245:Carbon Dioxide; D003864:Depression, Chemical; D004824:Epidural Space; D005260:Female; D006439:Hemodynamics / Q000187:drug effects; D006801:Humans; D007267:Injections; D007700:Kinetics; D008297:Male; D008875:Middle Aged; D009020:Morphine / Q000008:administration & dosage* / Q000097:blood / Q000494:pharmacology; D012119:Respiration / Q000187:drug effects*
chemical_list: D002245:Carbon Dioxide; D009020:Morphine