2. Trial Rationale Aprepitant (EMEND®) is a selective high-affinity receptor antagonist of human substance P/neurokinin-1 (NK1) and has been shown to inhibit emesis induced by cytotoxic chemotherapeutic agents and augments the antiemetic activity of 5-HT3 RAs (e.g. Granisetron, Ondansetron) and corticosteroids (e.g. Dexamethasone). Thus Aprepitant (EMEND®) in addition to antiemetic standard therapy has been shown to possess powerful superior protection and has been reported in several clinical trials to significantly improve both acute and delayed CINV.