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EVISTA does not treat breast
cancer, prevent it from returning, or reduce the risk of all forms of breast
cancer.
http://www.cancer.gov/cancertopics/factsheet/therapy/tamoxifen
Tamoxifen has been used for almost 10 years to reduce the risk of breast cancer in women who are at increased risk of developing breast cancer. Tamoxifen is also used to treat women with ductal carcinoma in situ (DCIS), a noninvasive condition that sometimes leads to invasive breast cancer.