Comparing the Efficacy of Dimenhydrinate-metoclopramide, Dimenhydrinate - Ondansetron and Dimenhydrinate Alone on Nausea and Vomiting after Cataract Surgery under Local Anesthesia and Intravenous Sedation

The study aimed to compare the efficacy of Dimenhydrinate-Metoclopramide, Dimenhydrinateondansetron and Dimenhydrinate alone on nausea and vomiting after cataract surgery under local anesthesia and intravenous sedation. 

In this clinical trial study, 160 patients undergoing cataract surgery were divided into four groups of 40. Thirty minutes before induction in the first group (D-M) 0.1mg/ kg metoclopramide + 0.5 mg/ kg Dimenhydrinate, in the second group (D-O) 0.4 mg/ kg ondansetron + 0.5 mg/ kg Dimenhydrinate, in the third group (D), 0.5mg/ kg Dimenhydrinate and in the fourth group (C) 2 cc of distilled water were injected and the incidence and severity of nausea and vomiting at recovery and 2 and 4 hours after surgery and at the time of discharge were evaluated and compared between groups.

The incidence of nausea at recovery in four groups of D-M, D-O, D and C were 13.2, 10.8, 22.2 and 36.1%, respectively, and the difference between the groups was significant (P = 0.015). In the next two hours, the incidence of nausea in the four groups was 10.8, 5.3, 22.2 and 27.9%, respectively (P = 0.035). The incidence of vomiting in recovery was 16.2, 7.9, 16.7 and 33.3% among the four groups, respectively (P = 0.039). Also the intensity of nausea in recovery were statistically different between 4 groups and the Dimenhydrinateondansetron group had the least severity of nausea. Pain intensity was lower in Metoclopramide receiving group.

Dimenhydrinate-ondansetron combination compared with Dimenhydrinate-metoclopramide and Dimenhydrinate alone led to an increased reduction of postoperative nausea and vomiting following cataract surgery.