Drugs that block production of estrogens from hormones made by the adrenal gland. They are used to treat hormone-sensitive breast cancer in postmenopausal women. These include anastrozole, letrozole, and exemestane.

A group of drugs used to treat breast cancer. They work by affecting the way the Adrenal Glands work and stopping them from producing estrogen in post-menopausal women.

Type of anticancer drug that works by blocking the action of an enzyme called aromatase. Aromatase is involved in the production of oestrogens, so aromatase inhibitors help lower the amount of oestrogen in the body. This can block the growth of tumours that require oestrogen, for example some breast cancers.