This substance is tamoxifen like Nolvadex or Tamoxifen. This drug is a potent nonsteroidal anti-estrogen. It is indicated for use in estrogen dependent tumors, i.e. breast cancer. Users take Nolvadex to prevent the effects of estrogen in the body. This estrogen is most often the result of aromatizing medicines. Nolvadex can aid in preventing edema, gynecomastia, and female pattern fat distribution, all of which might occur when a man's estrogen levels are too high. Also, these effects can occur when androgen levels are too low, making estrogen the predominant hormone. This can occur when endogenous androgens have been suppressed by the prolonged use of exogenous medicines. Nolvadex works by competitively binding to target estrogen sites like those at the breast. This product is not toxic nor have any side effects been seen in athletes who used the drug as an anti-estrogen. Although it does not turn out to be 100% effective for everyone, it does seem to exhibit some level of effectiveness for the majority.