Randomized Controlled Trial
Prevention of postoperative nausea and vomiting after intrathecal morphine for Cesarean section: a randomized comparison of dexamethasone, droperidol, and a combination.
Int J Obstet Anesth. 2007 Apr 1;16(2):122-7.
Review
Intravenous ketamine during spinal and general anaesthesia for caesarean section: systematic review and meta-analysis.
Acta Anaesthesiol Scand. 2015 Apr 1;59(4):414-26.
Randomized Controlled Trial
The effects of sufentanil or morphine added to hyperbaric bupivacaine in spinal anaesthesia for caesarean section.
Eur J Anaesthesiol. 2006 Apr 1;23(4):285-91.