Arimidex 1mg Tablet is used alone or with other treatments, such as surgery or radiation, to treat early breast cancer in postmenopausal women. It can also be used as the first-line treatment of advanced breast cancer that has spread within the breast or to other areas of the body. Arimidex 1mg Tablet belongs to a class of drug called aromatase inhibitors, which decreases the amount of estrogen in the body. It should be taken with or without food, but take it at the same time every day to get the most benefit. It should be taken as your doctor’s advice.