Topic summary
Letrozole
Letrozole, sold under the brand name Femara among others, is an aromatase inhibitor medication that is used in the treatment of breast cancer for post-menopausal women.
It was patented in 1986 and approved for medical use in 1996. In 2021, it was the 222nd most commonly prescribed medication in the United States, with more than 1million prescriptions. It is on the World Health Organization's List of Essential Medicines.