1.2 First-Line Treatment ARIMIDEX is indicated for the first-line treatment of postmenopausal women with hormone receptor-positive or hormone receptor unknown locally advanced or metastatic breast cancer. Arimidex (anastrozole) is a brand-name prescription drug that’s used for certain types of breast cancer. Learn about side effects, warnings, dosage, and more. Anastrozole (brand name: Arimidex) is a hormonal therapy medicine used to treat post-menopausal women. If you’ve been diagnosed with breast cancer and have been through menopause, either naturally or surgically — or if your doctor has also prescribed medication to put you in menopause temporarily — you may be prescribed anastrozole Description Anastrozole is used to treat early hormone receptor-positive breast cancer. It is also used for first-line treatment of hormone receptor-positive or hormone receptor-unknown advanced or metastatic (cancer that has spread) breast cancer. Anastrozole is also used to treat advanced breast cancer that has grown or spread after tamoxifen treatment. This medicine is used only in women. Arimidex (Anastrozole) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. Arimidex is used to treat breast cancer in postmenopausal women. Learn about side effects, interactions and indications. Anastrozole: side effects, dosage, interactions, FAQs, reviews. Used for: breast cancer, breast cancer, metastatic, endometrial cancer, mccune-albright syndrome, and. Anastrozole, sold under the brand name Arimidex among others, is an antiestrogenic medication used in addition to other treatments for breast cancer. [7][8] Specifically it is used for hormone receptor-positive breast cancer. [8] It has also been used to prevent breast cancer in those at high risk. [8] It is taken orally. [8] Common side effects of anastrozole include hot flashes, altered mood. Find patient medical information for Anastrozole (Arimidex) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings 1.3 Second-Line Treatment ARIMIDEX is indicated for the treatment of advanced breast cancer in postmenopausal women with disease progression following tamoxifen therapy. Patients with ER-negative disease and patients who did not respond to previous tamoxifen therapy rarely responded to ARIMIDEX.