Anastrozole (an-ASS-troh-zole ) is a medicine that is used to treat breast cancer. Many breast cancer tumors grow in response to estrogen. This medicine interferes with the production of estrogen in the body. As a result, the amount of estrogen that the tumor is exposed to is reduced, limiting the growth of the tumor.
Tamoxifen ( ta-MOX-i-fen) is a medicine that blocks the effects of the estrogen hormone in the body. It is used to treat breast cancer in women or men. It may also be used to treat other kinds of cancer, as determined by your doctor.
The following are risk factors that may increase your chance of developing breast cancer:
If you have close family members (mother, sister, or daughter) with breast cancer
If you have ever had a breast biopsy or if high-risk changes in your breast(s) have been found from a breast biopsy
If you have never been pregnant or if your first pregnancy occurred at a late age
If your first menstrual period occurred at an early age