Effect of dexamethasone on prevention of postoperative nausea, vomiting and pain after caesarean section: a randomised, placebo-controlled, double-blind trial.

Context: Spinal morphine is a common form of postoperative analgesia after caesarean section, but it is associated with postoperative nausea and vomiting.

Objective: To evaluate the hypothesis that dexamethasone reduces nausea and vomiting in patients undergoing caesarean section under spinal anaesthesia with morphine.

Design: Interventional, randomised, double-blinded, placebo-controlled study to evaluate a preoperative single dose of dexamethasone.