Dear Chery1990, Atypical ductal hyperplasia (ADH) by itself may not raise a persons risk of getting breast cancer to a level where treatment with a medication as prevention (chemoprevention) would be considered. A woman with ADH as well as other risk factors may have a risk that is high enough to consider medications. The medications currently FDA approved as chemoprevention for breast cancer are tamoxifen and raloxifene. Decisions to use a medication as chemoprevention would be made based on weighing the risks and benefits to the individual patient.