Epidural butorphanol for the relief of postoperative pain.
Lippmann
M
M
Mok
M S
MS
D002077:Butorphanol / Q000008:administration & dosage*; D006801:Humans; D007268:Injections, Epidural; D009019:Morphinans / Q000008:administration & dosage*; D010149:Postoperative Pain / Q000188:drug therapy*
D009019:Morphinans; D002077:Butorphanol