e20008 Background: Interleukin-2–based biochemotherapy (BCT) is a common therapy for patients (pts) with metastatic melanoma (MM). BCT induced nausea and vomiting (N/V) remains a significant problem (26% grade 3 and 4). Palonosetron (PALO) is a 5-HT3 receptor antagonist indicated for the prevention of N/V associated with chemotherapy. The recommended dosing schedule of PALO for patients on BCT is unknown. Methods: Chemo-naïve MM pts undergoing their first BCT cycle were randomized to receive PALO 0.25 mg as premedication intravenously on days 1 and 4, or the same dose on days 1, 3, and 5. The BCT regimen included: cisplatin (20 mg/m2) and vinblastine (1.6 mg/m2) on days 1–4, dacarbazine (800 mg/m2) on day 1, interleukin-2 (9 MIU/m2/day) by continuous infusion on days 1–4 and interferon alpha (5 MU/m2/day) on days 1–5. A nausea episode was defined as nausea of any severity reported by the patient or documented by the nursing staff at anytime. Pts with N/V due to known central nervous system or gastrointestinal metastases were excluded. The use of additional antiemetics was recorded. Pts were followed for 21 days (days 1–7 as inpatients). The Functional Living Index-Emesis (FLIE), an emesis- and nausea-specific questionnaire, was completed starting on day 1. Results: 30 pts were enrolled. Median age was 53 years (range 23–64). Eighteen (60%) were men. The incidences of BCT related N/V and those of nausea interfering with appetite, sleep, physical activity, social life and enjoyment of life are summarized by schedule of PALO in the table below. Conclusions: PALO administered on alternate days was more effective at controlling BCT-related N/V and reduced the need for PRN antiemetics. Better control of N/V reduced the impact of N/V on patient functioning in this population. [Table: see text] No significant financial relationships to disclose.
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