Plans for Ph 3 1L vepdegestrant combo trial with atirmociclib and Ph 3 2L combination trial with a CDK4/6 inhibitor shelved

“Beyond the second-line monotherapy opportunity, we and our partners at Pfizer have removed plans for a Phase 3 first-line combination trial with atirmociclib, as well as the planned Phase 3 second-line combination trial with a CDK4/6 inhibitor, from our joint development plan,” continued Dr. Houston. “This decision was made following a review of the totality of emerging information, including external data results, the evolving treatment landscape in metastatic breast cancer, and long-term capital allocation. We and Pfizer are working to evaluate future combination plans with the potential to maximize patient benefit and shareholder value.”