Letrozole is a medication used to treat certain types of breast cancer in women who have gone through menopause. It belongs to a class of medications called nonsteroidal aromatase inhibitors, and it works by decreasing the amount of estrogen produced by the body. This decrease in estrogen can slow or stop the growth of some types of breast cancer cells that need estrogen to grow
. Letrozole comes in a tablet form and is usually taken by mouth once a day with or without food
. It is important not to become pregnant while taking this medication or for 3 weeks after stopping it, and women should not breastfeed while taking letrozole or for 3 weeks after stopping it
