Three cyclin-dependent kinase (CDK) 4 and 6 inhibitors are now on US market for the treatment of hormone receptor-positive (HR+), human epidermal growth factor receptor 2-negative (HER2-) advanced or metastatic breast cancer in various combinations with hormonal therapy, setting the category up for a competitive show down.
Novartis AG's Kisqali (ribociclib) and Eli Lilly & Co.'s Verzenio (abemaciclib) are the drugs that are coming from...








