Arimidex Pill Treats Breast Cancer In Women After Menopause. Some breast cancers are made to grow faster by a natural hormone called estrogen. Arimidex works by blocking the enzyme aromatase, which turns the hormone androgen into small amounts of estrogen in the body. This means less estrogen is available to stimulate the growth or hormone receptor-positive breast cancer cells.
by Sergiowilson December 5, 2022