Arimidex does increase testosterone levels slightly in the body, it is more often used in conjunction with other steroids to lower estrogen in the body. Many anabolic steroids will convert, or aromatize, in the body into estrogen, which causes many of the unwanted side effects like bloating and acne. Arimidex is one of the best compounds to lower the aromatizing effect of steroids.
Arimidex (generic name is anastrozole) is a newer drug developed for the treatment of advanced breast cancer in women. It acts by blocking the enzyme aromatase, subsequently blocking the production of estrogen. Since many forms of breast cancer cells are stimulated by estrogen, it is hoped that by reducing amounts of estrogen in the body the progression of such a disease can be halted. This is the basic premise behind Nolvadex, except this drug blocks the action and not production of estrogen. The effects of Arimidex can be quite dramatic to say the least. A daily dose of one tablet (1 mg) can produce estrogen suppression greater than 80 % in treated patients. With the powerful effect this drug has on hormone levels, it is only to be used (clinically) by post-menopausal women whose disease has progressed following treatment with Nolvadex (tamoxifen citrate). Side effects like hot flushes and hair thinning can be present, and would no doubt be much more severe in pre-menopausal patients.