title: Dexamethasone versus a combination of dexamethasone and ondansetron as prophylactic antiemetic in patients receiving intrathecal morphine for caesarean section.
abstract: BACKGROUND
  Intrathecal morphine for caesarean delivery provides excellent postoperative analgesia but it is commonly associated with nausea and vomiting. This prospective, randomized, double blind study was carried out to compare the effectiveness of a combination of dexamethasone and ondansetron with dexamethasone alone for prevention of postoperative nausea and vomiting (PONV) following intrathecal morphine injection for caesarean section.
  
  
  METHODS
  A total of 108 parturients aged 18-40 years for elective caesarean section were randomized into 2 groups (n=54) to receive either intravenous dexamethasone 8 mg (Group A) or a combination of intravenous dexamethasone 8 mg and ondansetron 4 mg (group B). The study drug for each group consisted of 0.5% hyperbaric bupivacaine and 0.2mg morphine. The primary outcome variables were postoperative nausea and vomiting (PONV) which were assessed for a period of 24 hours. The patient's vital signs were monitored and documented.
  
  
  RESULTS
  The incidence of nausea and vomiting was significantly reduced in patients who received a combination of dexamethasone and ondansetron compared with dexamethasone alone (9.3% Vs 37%, respectively, P = 0.003).
  
  
  CONCLUSIONS
  This study showed that a combination of dexamethasone and ondansetron administered prophylactically significantly reduced the incidence of PONV in pregnant women on intrathecal morphine for caesarean section.
authors.affiliation: Olabisi Onabanjo University Teaching Hospital, Sagamu, Nigeria; National Orthopaedic Hospital Igbobi, Lagos, Nigeria.
authors.forename: Akpan
authors.initials: A
authors.lastname: Imeh
authors.affiliation: Lagos State School of Anaesthesia, Badagry, Nigeria.
authors.forename: Oladapo
authors.initials: O
authors.lastname: Olaniyi
authors.affiliation: Obafemi Awolowo University I le-Ife, Nigeria.
authors.forename: Olateju
authors.initials: O
authors.lastname: Simeon
authors.affiliation: Olabisi Onabanjo University Teaching Hospital, Department of Obstetrics and Gynaecology, Sagamu, Nigeria.
authors.forename: Odusoga
authors.initials: O
authors.lastname: Omotola
mesh_terms: D000328:Adult; D016362:Analgesia, Obstetrical / Q000379:methods*; D000701:Analgesics, Opioid / Q000008:administration & dosage / Q000009:adverse effects*; D000932:Antiemetics / Q000008:administration & dosage*; D002045:Bupivacaine / Q000008:administration & dosage*; D002585:Cesarean Section / Q000379:methods*; D003907:Dexamethasone / Q000008:administration & dosage*; D004311:Double-Blind Method; D004338:Drug Combinations; D005260:Female; D006801:Humans; D007278:Injections, Spinal; D008875:Middle Aged; D009020:Morphine / Q000008:administration & dosage / Q000009:adverse effects*; D017294:Ondansetron / Q000008:administration & dosage*; D020250:Postoperative Nausea and Vomiting / Q000517:prevention & control*; D011247:Pregnancy; D011446:Prospective Studies; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D000701:Analgesics, Opioid; D000932:Antiemetics; D004338:Drug Combinations; D017294:Ondansetron; D009020:Morphine; D003907:Dexamethasone; D002045:Bupivacaine
keywords: Caesarean Section; Dexamethasone; Morphine; Nausea and Vomiting; Ondansetron