Arimidex is an anti-estrogen aromatase inhibitor (AI) drug which was originally formulated as a medication for breast cancer in post-menopausal women and is still used for that purpose today.

The generic name of Arimidex is Anastrozole and while there are several other brand names used around the world, Arimidex is by far the most common and widely used and known.

It’s the Arimidex brand that is very popular among steroid users to address the estrogenic side effects we experience with the use of many anabolic steroids. For this purpose, Arimidex is almost always recommended for use in a steroid cycle.