As an anti-estrogen, Arimidex is valuable to the breast cancer patient as many forms of breast cancer feed off of the estrogen hormone. While perhaps an oversimplification, by administering Arimidex the effect starves the cancer. For decades Nolvadex was used for this purpose. Nolvadex has the ability to bind to the estrogen receptors, which in turn prevents estrogen from binding. However, AI’s like Arimidex actively inhibit the production of estrogen and reduce the actual amount of circulating hormone. In short, there is no estrogen available to cause damage to the breast cancer patient. In recent years, Arimidex has become the leading anti-estrogen in the treatment of hormone receptor-positive breast cancer, especially among post-menopausal women. Once the cancer has subsided, it is not uncommon for Nolvadex to be introduced in order to keep the cancer at bay.
For the anabolic steroid user, the effects of Arimidex are greatly appreciated in its ability to protect against estrogenic related side effects. Many anabolic steroids have the ability to promote estrogenic side effects due to the testosterone hormone’s interaction with the aromatase enzyme. As aromatization occurs, estrogen levels rise and this can lead to gynecomastia and excess water retention. When excess water retention becomes severe, this can also promote high blood pressure. Not all anabolic steroids aromatize, and as such, not all can lead to estrogenic related effects. However, many common steroids do carry the ability to promote estrogenic activity including Dianabol, all forms of Nandrolone and Boldenone to a degree and of course, all forms of testosterone heavily.