title: Epidural butorphanol betters fentanyl, morphine options.
authors.forename: D B
authors.initials: DB
authors.lastname: Gould
mesh_terms: D015360:Analgesia, Epidural / Q000379:methods*; D002077:Butorphanol; D005283:Fentanyl / Q000009:adverse effects; D006801:Humans; D009020:Morphine / Q000009:adverse effects; D010149:Postoperative Pain / Q000517:prevention & control*; D013908:Thoracotomy / Q000009:adverse effects*; D014555:Urination Disorders / Q000139:chemically induced
chemical_list: D009020:Morphine; D002077:Butorphanol; D005283:Fentanyl