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.