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Background  NEPA, a combination antiemetic of a neurokinin‐1 (NK 1 ) receptor antagonist (RA) (netupitant [oral]/fosnetupitant [intravenous; IV]) and 5‐HT 3 RA, palonosetron] offers 5‐day CINV prevention with a single dose. Fosnetupitant solution contains no allergenic excipients, surfactant, emulsifier, or solubility enhancer. A phase III study of patients receiving cisplatin found no infusion‐site or anaphylactic reactions related to IV NEPA. However, hypersensitivity reactions and anaphylaxis have been reported with other IV NK 1 RAs, particularly fosaprepitant in patients receiving anthracycline‐cyclophosphamide (AC)‐based chemotherapy. This study evaluated the safety and efficacy of IV NEPA in the AC setting.    Materials and Methods  This phase IIIb, multinational, randomized, double‐blind study enrolled females with breast cancer naive to highly or moderately emetogenic chemotherapy. Patients were randomized to receive a single 30‐minute infusion of IV NEPA or single oral NEPA capsule on day 1 prior to AC, in repeated (up to 4) cycles. Oral dexamethasone was given to all patients on day 1 only.    Results  A total of 402 patients were included. The adverse event (AE) profiles were similar for IV and oral NEPA and consistent with those expected. Most AEs were mild or moderate with a similarly low incidence of treatment‐related AEs in both groups. There were no treatment‐related injection‐site AEs and no reports of hypersensitivity or anaphylaxis. The efficacy of IV and oral NEPA were similar, with high complete response (no emesis/no rescue) rates observed in cycle 1 (overall [0–120 hours] 73.0% IV NEPA, 77.3% oral NEPA) and maintained over subsequent cycles.    Conclusion  IV NEPA was highly effective and safe with no associated hypersensitivity and injection‐site reactions in patients receiving AC.    Implications for Practice  As a combination of a neurokinin‐1 (NK 1 ) receptor antagonist (RA) and 5‐HT 3 RA, NEPA offers 5‐day chemotherapy‐induced nausea and vomiting prevention with a single dose and an opportunity to improve adherence to antiemetic guidelines. In this randomized multinational phase IIIb study, intravenous (IV) NEPA (fosnetupitant/palonosetron) was safe and highly effective in patients receiving multiple cycles of anthracycline‐cyclophosphamide (AC)‐based chemotherapy. Unlike other IV NK 1 RAs, the IV NEPA combination solution does not require any surfactant, emulsifier, or solubility enhancer and contains no allergenic excipients. Hypersensitivity reactions and anaphylaxis have been reported with other IV NK 1 RAs, most commonly with fosaprepitant in the AC setting. Importantly, there were no injection‐site or hypersensitivity reactions associated with IV NEPA.

the oncologist

Phase IIIb Safety and Efficacy of Intravenous NEPA for Prevention of Chemotherapy‐Induced Nausea and Vomiting (CINV) in Patients with Breast Cancer Receiving Initial and Repeat Cycles of Anthracycline and Cyclophosphamide (AC) Chemotherapy