Tamoxifen is a medication that is commonly used in the treatment of breast cancer. It belongs to a class of drugs called selective estrogen receptor modulators (SERMs). Tamoxifen works by blocking the effects of estrogen in certain tissues, particularly breast tissue, where estrogen can promote the growth of cancer cells. By inhibiting estrogen's action, tamoxifen helps to slow down or prevent the growth of hormone receptor-positive breast tumors. It is often prescribed for both premenopausal and postmenopausal women diagnosed with estrogen receptor-positive breast cancer. Additionally, tamoxifen has been found to reduce the risk of developing breast cancer in high-risk individuals.
Tamoxifen can have side effects including:
Increased risk of blood clots