Letromits tablets are used to treat breast cancer in women who have gone through menopause. The drug prevents the cancer from coming back. The hormone estrogen is responsible for making some types of breast cancer grow faster. It helps to slow or reverse breast cancer growth by decreasing the body's production of estrogen. Letrozole tablets should be taken by mouth once a day with or without food, or as directed by your doctor. Your doctor will determine the appropriate dosage based on your medical condition. Be sure to take the tablets regularly to reap the benefits.