Find patient medical information for Arimidex Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Yes I have I have stopped them all. Arimidex, all… The side effects were killing me the pain unbearable. I stopped Tamoxifen after i developed severe Endometrial hyperplasia never had it before…until tamoxifen. Arimidex (Anastrozole) is a prescribed medication for treating breast cancer in postmenopausal women. Arimidex 1mg Film-Coated Tablet - Patient Information Leaflet (PIL) by AstraZeneca UK Limited How ARIMIDEX Works. When you were first diagnosed with HR+ early breast cancer, you and your doctor decided on an appropriate initial treatment, which may have included surgery, with or without radiation, and/or chemotherapy. Based on information from iGuard.org, a free medication monitoring service, 63% of patients experience side effects while taking Anastrozole (Arimidex). Learn about the potential side effects of Arimidex (anastrozole). Includes common and rare side effects information for consumers and healthcare professionals. Anastrozole is a non-steroidal aromatase inhibitor used to treat breast cancer in postmenopausal women. Learn about side effects, drug interactions, dosages, warnings, and more. Anastrozole is used with other treatments, such as surgery or radiation, to treat early breast cancer in women who have experienced menopause (change of life; end of monthly menstrual periods). User Reviews for Arimidex. The following information is NOT intended to endorse drugs or recommend therapy. While these reviews might be helpful, they are not a substitute for the expertise, skill, knowledge and judgement of healthcare practitioners in patient care.