Aprepitant and Fosaprepitant for Preventing Nausea and Vomiting in Patients Receiving Highly Emetogenic Chemotherapy-A Real-World Study.

Chemotherapy-induced nausea and vomiting substantially impair patients' quality of life despite considerable advances in supportive care. Neurokinin-1 receptor antagonists, including oral aprepitant and intravenous fosaprepitant, constitute essential components of antiemetic regimens for highly emetogenic chemotherapy. In this prospective, non-randomized observational study, we compared the efficacy of oral aprepitant and intravenous fosaprepitant administered in combination with 5-hydroxytryptamine-3 receptor antagonists and dexamethasone in 136 chemotherapy-naive patients receiving cisplatin- or doxorubicin-cyclophosphamide-based regimens. Complete response rates during the acute (0-24 h), delayed (24-120 h), and overall (0-120 h) phases were comparable between the two groups, with no statistically significant differences in emesis severity. Multivariable analyses further demonstrated similar effectiveness irrespective of age, sex, or chemotherapy regimen. These findings indicate that no statistically significant differences in antiemetic efficacy were observed between aprepitant and fosaprepitant in routine clinical practice. Fosaprepitant may therefore represent a practical alternative when oral administration is not feasible.