Polypharmacy and drug-drug interactions in metastatic breast cancer patients receiving cyclin-dependent kinase (CDK) 4/6 inhibitors
The study investigates the prevalence of drug-drug interactions (DDI) among metastatic breast cancer patients using CDK 4/6 inhibitors, finding that 97.3% of patients were on additional medications, with 63.5% experiencing potential DDI risks. Notably, 50.5% of these interactions were classified as major, with significant concerns regarding QT prolongation and increased toxicity. The findings emphasize the need for heightened clinical awareness to mitigate side effects and enhance treatment efficacy.