Letrozole lowers estrogen levels in postmenopausal women, which may slow the growth
of certain types of breast tumors that need estrogen to grow in the body.
Letrozole is used to treat breast cancer in postmenopausal women. It is often given to
women who have been taking tamoxifen (Nolvadex, Soltamox) for 5 years.
Letrozole may also be used for purposes other than those listed here.