In a prospective randomized double-blind study, we compared the effectiveness of
dexamethasone 8 mg with either
granisetron 1 mg or
ondansetron 4 mg in the prevention of
postoperative nausea and vomiting in patients undergoing laparoscopic surgery. Hundred ASA I and II patients scheduled for laparoscopic surgery were enrolled in the study and 84 patients completed it. Following induction of
anesthesia, group I (n=42) received
granisetron 1 mg and
dexamethasone 8 mg, group II (n=42) received
ondansetron 4 mg and
dexamethasone 8 mg.
Nausea and
vomiting episodes,
pain scores as well as side effects were recorded during the first hour and subsequently during the first 6 and 24 hours postoperatively. Satisfaction scores were obtained at discharge. There was no statistically significant difference between the 2 groups during the 1st 24 hours following surgery in regards to
pain scores, satisfaction and side effects manifestations. At 0-1 hour interval, 100% of patients in group I and 97.6% in group II had no
vomiting. Total response (no moderate or severe
nausea and no rescue
antiemetics) was 83.3% in group I and 80.95% in group II, and
metoclopramide was used in 7.1% of patients in both groups. At 1-6 hours interval, 97.6% of patients in group I and 100% in group II had no
vomiting. Total response was 92.8% in group I and 90.9% in group II, and
metoclopramide was used in 4.76% of patients in group I and 2.38% in group II. At 6-24 hours no
vomiting occurred in 97.6% of patients in group I and 100% in group II. Total response was 95.2% in both groups, and
metoclopramide was used in 2.38% of patients in both groups. In conclusion, the combination of
dexamethasone 8 mg with either
granisetron 1 mg or
ondansetron 4 mg following induction of
anesthesia in patients undergoing laparoscopic surgery showed no statistically significant difference in
antiemetic efficacy with minimal side effects and excellent patient satisfaction.