Major Program
              Phase 0 I II Cancer Prevention Clinical Trials Program
                    Research Group
              Breast and Gynecologic Cancer
                    Sponsor
                    National Cancer Institute (NCI)
                Status
                    Active, not recruiting
                NCT ID
                    NCT03317405
                This randomized phase I trial studies the side effects and best dose of endoxifen hydrochloride in treating participants who are undergoing breast surgery. Endoxifen hydrochloride may treat or reduce the risk of breast cancer.
            
  
  
      Intervention
                    Endoxifen Hydrochloride, Placebo Administration, Questionnaire Administration
                Condition
                    Breast Ductal Carcinoma In Situ, Breast Lobular Carcinoma In Situ, Stage 0 Breast Cancer AJCC v6 and v7, Stage I Breast Cancer AJCC v7, Stage IA Breast Cancer AJCC v7, Stage IB Breast Cancer AJCC v7, Stage II Breast Cancer AJCC v6 and v7, Stage IIA Breast Cancer AJCC v6 and v7, Stage IIB Breast Cancer AJCC v6 and v7, Stage III Breast Cancer AJCC v7, Stage IIIA Breast Cancer AJCC v7, Stage IIIB Breast Cancer AJCC v7, Stage IIIC Breast Cancer AJCC v7
                Investigators
                    Seema A Khan