Femara Drug Class

Femara® (letrozole) is a drug used to treat breast cancer in women who have gone through menopause. It comes in tablet form and is taken once a day. Femara is part of a drug class known as aromatase inhibitors. Aromatase is an enzyme that helps with the production of estrogens (in particular, a certain estrogen called estradiol).
In postmenopausal women, most of the estrogen in the body is made by aromatase enzymes. By blocking these enzymes, Femara helps to decrease the amount of estrogen in the body. Many breast cancers are sensitive to the estrogen hormone, which means that the tumor grows with its help. By decreasing estrogen production, Femara can help decrease the growth of breast cancer.
(To learn more about how this drug is classified, click Femara Uses. This article also describes "off-label" uses of the medication and provides more details on the symptoms and treatment of breast cancer.)
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