Arimidex (Anastrozole)

Quick info about Arimidex (Anastrozole)

Arimidex is what we call an aromatize inhibitor (AI). In medicine it's used to halt the progression of breast cancer in women. In athletics and bodybuilding, it is used as an ancillary compound to be added to a cycle of anabolic steroids. In this respect it is also used for its estrogen reducing properties, but it has the additional benefit of increasing testosterone levels, as we'll see. Many anabolic steroids aromatize (convert to estrogen via the aromatize enzyme), and this is responsible for many of the unwanted side effects found with anabolic steroid use (acne, gynecomastia, water-retention, etc.). 

I suggest that for use during a cycle, a dose of .5mgs/day would be sufficient to combat estrogen-related side effects. It is, however, important to remember that some estrogen is necessary to obtain optimal muscle growth. The lower estrogen levels provided by 'dex seems, anecdotally at least, to produce a more "hard" and "quality" look for bodybuilders who have experimented with it's use in either a cutting or bulking cycle. Certainly reducing estrogen levels in your body is good from a body building point of view as it reduces water-retention and the potential for gynecomastia (if there's no estrogen in your body, you can't get gyno, regardless of how much progesterone is floating around).