Study of Tamoxifen and Raloxifene

The Study of Tamoxifen and Raloxifene or STAR is a clinical trial designed determine how the drug raloxifene compares with the drug tamoxifen in reducing the incidence of breast cancer in postmenopausal women who are at increased risk of the disease. One of the largest breast cancer prevention studies ever, STAR took place at more than 500 centers across the United States, Canada, and Puerto Rico.