I just stopped taking anastrozole 1 mg after 4 years . I took it after a mastectomy because of breast cancer. no chemo, no radiation. Several months ago, I noticed a dent at the top of my skull. I think it has occurred because of bone loss from the arimedex. After three years I fell and broke both arms -Monteggia break. I tried to continue the medicine because other than the breaks, I thought I was tolerating it well because of no bone, joint or muscle pains, etc.