Oral rehydration with 10% carbohydrate drink for preventing postoperative nausea and vomiting (PONV) after low dose of spinal morphine.

Background: Preoperative oral carbohydrate (CHO) drink may improve patients' comfort. However, whether it prevents or reduces postoperative nausea and vomiting (PONV) is questionable.

Objective: Evaluate the effect of oral rehydration with 10% CHO drink before anesthesia on incidence and severity of postoperative nausea and vomiting (PONV) after spinal morphine injection.