Tamoxifen is a drug in pill form that is taken orally.
It has been used for the past 20 years to treat patient who suffer from advanced breast cancer. Recently, it has gained popularity as an additional form of therapy after primary treatment of early stage breast cancer. Tamoxifen has recently been studied in conjunction with the prevention of breast cancer, as well as the treatment of melanoma and other types of cancer. Since estrogen promotes the growth of breast cancer cells, Tamoxifen slows or stops the growth of breast cancer cells that are already present in the body. It is also used to prevent the development of cancer in the opposite breast.