Introduction: Nausea and vomiting are among the most common complications of Caesarean section and may cause suture dehiscence, esophageal perforation, gastric aspiration, and delay in hospital discharge. The aim of this study was to compare the antiemetic effect of Ginger, Gabapentin, and Ondansetron for prevention of nausea and vomiting after cesarean section by spinal anesthesia.

Methods: This randomized, double-blind placebo controlled clinical trial was done on 208 women undergoing elective cesarean section. After taking written informed consents, they were divided into four equal groups. 300 mg Gabapentin, 8 mg Ondansetron, 1 gr Ginger, and placebo were administered to each group. Before performing spinal anesthesia and after the operation in recovery, and also in 2, 4, and 6 hours intervals after the surgery, nausea and vomiting were recorded based on a four point scale. Data was analyzed by SPSS 19 using one way ANOVA, independent t-test and Chi square.

Results: There were no significant differences among the four groups according to age, gravidity mothers` mean atrial pressure and heart rate before and during surgery, newborns` APGAR score and mothers` consciousness. Nausea and vomiting in Gabapentin (0.28±0.34), Ondansetron (0.28±0.25), and Ginger (0.27±0.85) groups were significantly less than placebo group (1±0.22) (p=0.01), whereas there were no significant differences among the three groups (p=0.05).

Conclusion: Using Gabapentin, Ondansetron and Ginger with the same antiemetic effect are appropriate for women undergoing cesarean section.