Yes, they are for women who are post- menopausal and Tamoxifen is for pre-menopausal. Personally, I would not go on an AI unless you know for sure (blood test to measure estrogen levels) that you are in menopause and I would want the doc to test the estrogen level every 3 months for at least a year, if not longer.
If you go on an AI and your period starts, that means it is not protecting you.
Hope this helps.
Karen
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