Généralités. ARIMIDEX ne doit pas être utilisé chez les femmes préménopausées. La ménopause doit être biologiquement confirmée (taux d'hormone lutéinisante [LH], taux d'hormone folliculo-stimulante [FSH] et/ou taux d'estradiol) chez toute patiente en cas de doute sur son statut ménopausique. Arimidex (Anastrozole) hormone therapy side effects, how it's given, how it works, precautions and self care tips in treatment of breast cancer ARIMIDEX Side Effects. Like all medications, ARIMIDEX has potential side effects. Listed below are some of the most common side effects in the clinical trial you should be familiar with when taking or considering taking ARIMIDEX. If you are postmenopausal and have been diagnosed with hormone receptor-positive early breast cancer, and have recently undergone surgery with radiation, and/or chemotherapy, ARIMIDEX may be right for you. Arimidex is used to treat breast cancer in postmenopausal women. Learn about side effects, interactions and indications. Arimidex can be an effective drug for treatment and risk reduction of breast cancer. Learn more today. Wirkung. Die Wirkungen von Anastrozol beruhen auf der Hemmung des Enzyms Aromatase, das die Umwandlung von Androgenen in die Estrogene Estron und Estradiol bestimmt. Durch die Hemmung dieses Enzyms wird der Estrogenspiegel im Blutplasma gesenkt, wodurch den Tumorzellen weniger Hormone für das Wachstum zur Verfügung stehen. Anastrozole, sold under the brand name Arimidex among others, is a medication used in addition to other treatments for breast cancer. Specifically it is used for hormone receptor-positive breast cancer. It has also been used to prevent breast cancer in those at high risk. It is taken by mouth. Find patient medical information for Arimidex Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Arimidex (chemical name: anastrozole) is an aromatase inhibitor approved by the U.S. Food and Drug Administration (FDA) to treat: postmenopausal women diagnosed with hormone-receptor-positive, early-stage breast cancer after surgery (or possibly chemotherapy and radiation) to reduce the risk of the cancer coming back.