Japan based Eisai Co., Ltd. has received New Drug Approval for Eisai’s in-house developed anticancer agent Halaven® (eribulin mesylate) for use in the treatment of patients with locally advanced or metastatic breast cancer, previously treated with at least two prior chemotherapy regimens, including an anthracycline and a taxane, from the China National Medical Products Administration (NMPA). This approval is based on the results of Study 304, which was a multicenter, open-label, randomized, parallel group Phase III clinical study, to evaluate the efficacy and safety of Halaven and vinorelbine in 530 women with locally recurrent or metastatic breast cancer, previously treated with chemotherapy regimens, including an anthracycline and a taxane. Halaven demonstrated a statistically significant extension in the study’s primary endpoint of progression-free survival (PFS) over the comparator treatment vinorelbine according to independent imaging review (Hazard Ratio: 0.80; 95% Confidence Interval: 0.65-0.98; p = 0.036). The five most common adverse events observed in the Halaven arm of this study were white blood cell count decreased, neutrophil count decreased, increased aspartate aminotransferase, increased alanine aminotransferase, and anemia, which is consistent with the known side-effect profile of Halaven.
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