Anastrozole is not a steroid. It is a tablet form anti-aromitase that is used by many body builders to help prevent bloating (edema) and Gynecomastia (bitch tit) associated with the use of testosterone and androgens. It can be used in place of Nolvadex, Clomid, etc. Bodybuilders are using around .25mg to 1mg per day or .5mg to 1mg every other day and are having good success with it. The FDA approved uses are for the treatment of breast cancer in post-menopausal women with disease progression following tamoxifen therapy. Hypersensitivity to Anastrozole are reasons not to use this drug. If you have these problems please inform your doctor. Common side effects are: shortness of breath, dizziness, diarrhea, vomiting, headache, hat flashes, weakness, cough, dry mouth, skin rash, sweating, abdominal pain and bone pain. Some less common symptoms are vaginal bleeding, weight gain, tiredness, chills, fever, breast pain, and itching. In case of an overdose, it is recommended to contact your poison control center.