• Margaret Margaret
    March 19, 2009
    Is Provera safe to take for someone with high risk of breast cancer?
    Margaret Margaret
    March 19, 2009

    I am 42, premenopausal, and have been on tamoxifen for 6 months as a breast cancer preventative (strong family history of breast cancer and I was recently diagnosed with atypical hyperplasia in breast).  I began having abnormal bleeding a few months ago. A endometrial biopsy revealed "simple overgrowth".  My gynecologist wants me to take Provera for 6 months. Is Provera safe for me to take with my breast cancer risk already high?

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  • Phyllis Johnson
    Health Guide
    March 21, 2009
    Phyllis Johnson
    Health Guide
    March 21, 2009

    Margaret, this is a complicated question because the studies are not conclusive.  Hormone replacement therapy (HRT), which combines the estrogen with the drug in Provera has definitely been linked to increased breast cancer risk, but that is more likely to be from the estrogen part of the HRT than the Provera part.  I don't think there is a study on the Provera alone that would show increased risk, but your doctor will be more up to date on that.  As with all health questions, you have to balance the potential risk of breast cancer with your current endometrial issues.  Ask your doctor more questions about possible breast cancer risks, and don't hesitate to ask for a second opinion from another doctor if you are still not sure.  Only a doctor who can see your entire medical history and who knows how potentially dangerous your current problem is can help you weigh the risks and benefits for you.


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