Addition of metoclopramide to triple antiemetic therapy towards prevention of anthracycline-based chemotherapy-induced nausea and vomiting in breast cancer patients

Objective: The aim of this study was to evaluate if addition of metoclopramide to the triplet antiemetic therapy is superior to the triplet antiemetic therapy for prevention of delayed chemotherapy-induced nausea and vomiting. Materials and Methods: A randomized single-blind trial was performed on 200 chemotherapy-naïve breast cancer patients who have to receive anthracycline-based highly emetogenic chemotherapy (HEC). The patients were randomized to study arm (n = 100) and control arm (n = 100). Triplet antiemetic therapy (fosaprepitant on day 1, 5-HT3 antagonist on day 1, and dexamethasone for days 1–4) was used in both the arms and metoclopramide (day 1–5) was added to the study arm. Response to antiemetic prophylaxis was assessed in terms of “complete response (CR),” “only nausea,” and “both nausea and vomiting.” CR is defined as no nausea, no vomiting, and no rescue medication during the overall phase (days 1–5). Nausea/vomiting was detected by using the Visual Analog Scale and its impact on quality of life was determined by using the Functional Living Index Emesis (FLIE) score. Results: The demographical and clinical features were similar in both the groups. Majority of patients in both the arms presented with Eastern Cooperative Oncology Group PS 0, Stage III, and positive hormone receptor status. CR was observed more in the study arm than that of the control arm (51% vs. 37%; P = 0.046). The mean total FLIE score was 29.23 in the study arm and 31.16 in the control arm (P = 0.036). Conclusion: This study resulted in a significant CR and clinically relevant improvement in FLIE score for addition of metoclopramide to triple antiemetic prophylaxis. Therefore, a quadruple antiemetic combination including metoclopramide might be an antiemetic prophylaxis option for breast cancer patients receiving anthracycline-based HEC for better compliance to treatment.