Snapshot A 44-year-old woman presents status-post lumpectomy and irradiation for a 2.5-cm breast mass. The breast mass is estrogen and progesterone receptor positive. Axillary nodes are negative for cancer. Tamoxifen is added to the patient's treatment regimen. Tamoxifen Mechanism of action login to view 2 more bullets Clinical use login to view 3 more bullets Toxicity login to view 5 more bullets Raloxifene Mechanism of acton login to view 2 more bullets Clinical use login to view 2 more bullets Toxicity login to view 3 more bullets