title: Double-blind oral analgesic study of butorphanol in episiotomy pain: a comparison with codeine and placebo.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D000700:Analgesics / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D003061:Codeine / Q000009:adverse effects / Q000627:therapeutic use*; D004311:Double-Blind Method; D004841:Episiotomy; D005260:Female; D006801:Humans; D009019:Morphinans / Q000009:adverse effects / Q000627:therapeutic use*; D010146:Pain / Q000188:drug therapy*; D010919:Placebos
chemical_list: D000700:Analgesics; D009019:Morphinans; D010919:Placebos; D003061:Codeine