Metoclopramide versus setrons in delayed emesis in moderate emetogenic chemotherapy: A meta-analysis

e20538 Background: In the actual antiemetic ASCO and MASCC guidelines 5-HT3-RAs but not metoclopramide (MCP) are recommended as prophylaxis option for delayed emesis (DE) in moderate emetogenic chemotherapy (MEC). However, MCP was part of the former guidelines in this setting. As there are no clear study results showing a consistent advantage of 5-HT3-RAs over MCP in delayed emesis a metaanalysis would give more conclusive informations. Methods: In a Medline search 15 potential studies comparing a 5-HT3-RA vs. MCP in DE in patients receiving MEC were identified. Efficacy was classified as complete delayed response (no vomiting 24h-120h after chemotherapy). In 4 studies insufficient data for discrimination of acute and delayed emesis were given and in 5 studies additional antiemetics in one arm or MCP/ 5-HT3-RA were administerd only on demand. For each indivudual study odds ratio was calculated. Combined odds ratios were generated according to the methods developed by the Peto group. Results: Six studies (...