Estrogen-Receptor Binding Mode Raloxifene

Raloxifene is an oral selective estrogen receptor modulator (SERM) that has estrogenic actions on bone and anti-estrogenic actions on the uterus and breast. It is used in the prevention of osteoporosis in postmenopausal women. It was announced on April 17, 2006, that raloxifene is as effective as tamoxifen in reducing the incidence of breast cancer in certain high risk groups of females, though with a reduced risk of thromboembolic events and cataracts in patients taking raloxifene versus those taking tamoxifen. On September 14, 2007, the U.S. Food and Drug Administration announced approval of raloxifene for reducing the risk of invasive breast cancer in postmenopausal women with osteoporosis and in postmenopausal women at high risk for invasive breast cancer.

There has been criticism in the mainstream oncology press of the way that information about the drug was released.There has been some confusion in the lay media about the meaning of the trial results. There is no specific clinical evidence for the use of raloxifene in the adjuvant treatment of breast cancer over established drugs such as tamoxifen or anastrozole.

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