Letrozole (Femara)

Letrozole is a drug used to treat breast cancer in post-menopausal women (women who have gone through the menopause). Taken as a tablet once a day, it’s a type of hormone therapy (also known as endocrine therapy) and belongs to a group of drugs called aromatase inhibitors.

Letrozole is the generic (non-branded) name of the drug. You may also hear it called Femara, which is its most well-known branded name, but there are a number of other brands of letrozole that your doctor may prescribe. All brands contain the same dose of the drug.

Men with breast cancer may also be given letrozole, although tamoxifen is more commonly used.

Last reviewed: June 2016
Next planned review begins 2018