Antriol 1mg tablets can be used alone or with other treatments, such as surgery or radiotherapy, to treat early stage breast cancer in postmenopausal women. It can also be used as a first-line treatment for advanced breast cancer that has spread to the breast or other parts of the body. Antreol 1 mg tablet belongs to a class of medicines called aromatase inhibitors, which reduce the amount of estrogen in the body. It should be taken with or without food, but should be taken at the same time each day to get the most benefit.