Comparison of efficacy and safety between palonosetron and ondansetron to prevent postoperative nausea and vomiting in patients undergoing laparoscopic surgery: a systematic review and meta-analysis.

Purpose: Postoperative nausea and vomiting (PONV) is a prevalent and distressing complication, especially in laparoscopic surgeries. This review compares the efficacy and safety of palonosetron and ondansetron in preventing PONV after laparoscopic surgery. Methods: A systematic review was conducted in PubMed, Google Scholar, Semantic Scholar, and Cochrane Library to identify comparative studies that reported the efficacy (nausea and vomiting) at three postoperative time points T1 (0-2 hours), T2 (2-6 hours), T3 (6-24 hours) and safety (incidence of adverse effects). Meta-analysis of relative risk was performed using a random effect model and subgroup analysis based on factors such as antiemetic dose and timing of administration, type of surgery, and anesthetic agents. Results: Twenty-one randomized controlled trials were published between 2011 and 2022, involving 2,043 participants. Nineteen trials were included in the meta-analysis (efficacy, 17; safety, 11). The pooled risk ratio revealed that patients receiving palonosetron demonstrated significantly less likelihood of developing nausea and vomiting at various postoperative time points. Subgroup analysis indicated significantly less PONV when palonosetron was administered before intubation and in combination with isoflurane anesthesia. Headache, dizziness, constipation, and drowsiness were the most commonly reported. The safety profiles of palonosetron and ondansetron were comparable. Conclusion: Palonosetron exhibits superior efficacy within the first 24 hours postoperatively and requires less rescue antiemetic intervention compared to ondansetron in laparoscopic surgery patients. Both demonstrate nearly comparable safety profiles. Future trials focusing on cardiac safety (QT interval) and cost consideration are needed.