Aromatase inhibitors such as letrozole, anastrozole, and exemestane. In men, oestrogen is made by the conversion of the male sex hormones (androgens). This conversion is carried out by an enzyme called aromatase. Aromatase inhibitors are drugs that block aromatase and therefore block the formation of oestrogen. If aromatase inhibitors are used, they usually need to be given with drugs such as goserelin (Zoladex®), that decrease the production of androgens.

Chemotherapy
Chemotherapy is the use of anti-cancer (cytotoxic) drugs to destroy cancer cells. Chemotherapy may be used after surgery, if your doctors feel that there is a high risk of cancer cells having spread from the breast to other parts of the body, before the cancer was removed. Chemotherapy is usually given if there are cancer cells found in the lymph nodes under the arm, or if the cancer has spread beyond the breast.