A multicenter study in China explored the safety and quality of life for patients undergoing CDK4/6 inhibitor therapy for advanced breast cancer.CDK4/6 inhibitors have transformed treatment for HR+, HER2- breast cancer by impeding cell cycle progression.Over 1,200 patients were surveyed, revealing insights into treatment efficacy, adverse effects, and patient experiences.The study highlighted common hematologic toxicities like leukopenia and neutropenia among patients on CDK4/6 inhibitors.Fatigue was a prevalent side effect, impacting over one-third of respondents, along with alopecia and weakness.Differences in alopecia rates were noted among patients receiving different CDK4/6 inhibitors.Quality of life analyses showed variations between treatments, with palbociclib potentially affecting breast symptoms differently than abemaciclib.Alopecia correlated with body image, systemic therapy side effects, and psychological distress, emphasizing its broader impact.The study underscores the need for personalized treatment strategies that consider patient-reported outcomes and quality of life.Routine quality of life assessments and proactive symptom management are essential for enhancing patient experience and treatment satisfaction.