Aprepitant in weekly cisplatin with radiation in head and neck cancer: Is it required?

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e24122 Background: Weekly cisplatin below 50 mg/m2 has lower emetogenic potential than 100 mg/m2 3weekly regimen. There is limited data on the utility of Aprepitant with weekly cisplatin used in radiation in head and neck squamous cell cancer (HNSCC). Methods: We conducted a phase 3 randomized trial in locally advanced HNSCC patients who were treated with definitive chemoradiation either with cisplatin or cisplatin-nimotuzumab. 5HT3 inhibitor and steroids +/- aprepitant were used as antiemetic prophylaxis as per physician discretion. The current analysis is focussed on studying the impact of aprepitant on nausea and vomiting. Fischer’s exact test was used to compare the chemotherapy induced nausea vomiting (CINV) rates between aprepitant and non-aprepitant groups. Binary logistic regression analysis was used to calculate the odds of CINV with the use of aprepitant. Results: Data on CINV is available for 524/536 patients. Nausea was present in 251 (47.9%) patients while vomiting was seen in 155 (29.6%) patients. Aprepitant, 5HT3 antagonist and dexamethasone were administered to 265 (50.86%), while 256 received 5HT3 antagonist and dexamethasone. Among patients receiving aprepitant, nausea was present in 112 (42.3%), while there was no nausea in 153 (57.7%) patients (p = 0.011). Vomiting with aprepitant was seen in 71 (26.8%) patients while 194 (73.2%) had no vomiting (p = 0.151). Adjusted odds ratio for use of aprepitant containing antiemetic prophylaxis in prevention of CINV were 1.585 (1.116-2.249;p = 0.010) and 1.328 (0.904-1.951;p = 0.149) as depicted in the table. Conclusions: Use of aprepitant significantly decreases nausea and is needed for weekly cisplatin regimens used in radiation in head and neck cancers. [Table: see text]