What are the effects of tamoxifen ?

Blocks ER: Tam binds and blocks signals to the estrogen receptor present in er+ breast cancer. While this has benefits in cancer treatment it produces side effects - menopausal symptoms, possible uterine wall thickening & even malignancy if ignored, & increased risk of blood clots (similar to hormone replacement). In most cases of ca the benefits far outway the risks but must be weighed in risk reduction.