By blocking the aromatase enzyme, Arimidex directly lowers the levels of estrogen circulating in the body. This is critical for treating breast cancer because of estrogen’s function on cancer cells, but also serves a great purpose for steroid users as estrogen is the enemy of steroid use and is responsible for many of the severe side effects we all want to avoid.
As one of the best aromatase inhibitors, Arimidex is considered the most effective choice for combating the estrogenic side effects of aromatizing steroid use like gynecomastia, water retention and the associated high blood pressure that can come with excess water retention.
While not all steroids aromatize, the most common anabolic steroids that you’re likely to be using, like all forms of Testosterone, Nandrolone, Dianabol and others come with strong estrogenic effects as a result of aromatization and therefore the use of Anastrozole is going to be a high priority for the majority of steroid users, whether you’re a beginner or advanced user or somewhere in between.
Using Arimidex during a cycle is almost universal among steroid users as an estrogenic related side effects protection strategy. The main estrogenic side effects of aromatizing steroids are water retention (and possible high blood pressure), and gynecomastia. Arimidex is considered as extremely effective at inhibiting the aromatase enzyme which brings about these side effects in steroid users.
Because Arimidex stops the rise of estrogen levels at the most basic level, rather than selectively blocking some receptors like SERMs (Clomid, Nolvadex) do, most bodybuilders prefer Arimidex for its more powerful estrogen controlling ability and many no longer use SERMs, while some steroid users will use a combination of both SERMs and AIs like Arimidex.
As a bodybuilder using steroids, the two side effects you always want to avoid are water retention and gynecomastia (gyno). These are both caused by rising levels of estrogen as your natural testosterone is suppressed while taking steroids.
Users will typically take BP Adex 1 preventatively during cycle at doses of 0.25-0.5mg twice per week. Some users are more prone to aromatase and will require higher doses.