Pharmaceuticals
The Ibrance Succession: What Pfizer's Atirmociclib Data Reveals About the Next Era of Breast Cancer Treatment
Pfizer's Phase 2 FOURLIGHT-1 data on atirmociclib show a 40% reduction in disease progression risk in CDK4/6 inhibitor-resistant breast cancer, positioning the selective CDK4 inhibitor as a potential successor to Ibrance ahead of its 2027 patent expiry.