The FDA approved abemaciclib (Verzenio) for use in combination with fulvestrant in women with HR+/HER2- advanced breast cancer with disease progression following endocrine therapy. The CDK4/6 inhibitor has also been approved as a monotherapy for patients with HR+/HER2- breast cancer with metastatic disease who have previously received endocrine therapy and chemotherapy.
"Verzenio provides a new targeted treatment option for certain patients with breast cancer who are not responding to treatment, and unlike other drugs in the class, it can be given as a stand-alone treatment to patients who were previously treated with endocrine therapy and chemotherapy," Richard Pazdur, MD, director of the FDA’s Oncology Center of Excellence and acting director of the Office of Hematology and Oncology Products in the FDA’s Center for Drug Evaluation and Research, said in a statement.
In the international, double-blind phase III MONARCH 2 trial, 669 patients were randomized in a 2:1 ratio to abemaciclib plus fulvestrant (n = 446) or fulvestrant plus placebo (n = 223). Patients had progressed during neoadjuvant or adjuvant endocrine therapy, within 12 months of adjuvant endocrine therapy, or during frontline endocrine treatment for metastatic disease. Individuals were excluded from enrollment if they were administered chemotherapy or more than 1 endocrine therapy in the metastatic setting.
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