A Study to Learn About the Study Medicine Called PF-07248144 in Combination With Fulvestrant in People With HR-positive, HER2-negative Advanced or Metastatic Breast Cancer Who Progressed After a Prior Line of Treatment

A Study to Learn About the Study Medicine Called PF-07248144 in Combination With Fulvestrant in People With HR-positive, HER2-negative Advanced or Metastatic Breast Cancer Who Progressed After a Prior Line of Treatment is a phase 3 interventional study registered as NCT07062965, led by Pfizer, and recruiting when checked on 2026-09-11. Official title: An Interventional, Open-Label, Randomised, Multicenter, Phase 3 Study of PF-07248144 Plus Fulvestrant Compared to Investigator's Choice of Therapy in Adult Participants With Hormone Receptor-Positive, HER2-Negative Advanced/Metastatic Breast Cancer Whose Disease Progressed After Prior CDK4/6 Inhibitor-based Therapy. Planned enrolment is 400 participants (estimated). The study started in 2025-08-05 and primary completion is expected in 2027-07-22. No results have been posted on ClinicalTrials.gov.