Drug- and patient-related factors are the strongest predictors of endocrine therapy adherence in breast cancer patients.

Purpose: Medication non-adherence to treatment regimens can severely impact the mortality of patients afflicted with breast cancer.The purpose of this study was to identify factors that contribute to non-adherence to endocrine therapy in breast cancer treatment plans.

Methods: Thirty-two women with a breast cancer diagnosis were surveyed by pharmacists and pharmacy students to identify the patient- related factors (e.