It's probably not offered as an option since tamoxifen is the main drug in studies, but my husband found a study where it was compared with tamoxifen and found as reliable. My oncologist just uses tamoxifen for his patients and his research reports.
I am post-menopausal and don't want to take tamoxifen but may have no choice at this point since I now have IDC and not just DCIS. I see an oncologist on July 31st at MD Anderson- not the same one I saw before.

Here is what I found online for Evista:
"Evista (chemical name: raloxifene) is a selective estrogen receptor modulator (SERM) used to reduce the of hormone receptor-positive breast cancer in women with a higher-than-average risk of the disease. Evista also is used to treat osteoporosis."

This information is provided by Breastcancer.org.