Keifei FemaraLike most of the AIs we look at for using alongside anabolic steroids, Letrozole (Femara) was also developed for the medical treatment of breast cancer in post menopausal women. The reason it is only used in women of such an age is due to its powerful estrogen blocking ability which would have serious health implications for pre menopausal women, but for male steroid users it is this trait that makes AIs like Letrozole (Femara) so appealing as we aim