How does this medication work? What will it do for me?
Letrozole belongs to the group of cancer-fighting medications known as antineoplastics, and specifically to the type of antineoplastics known as nonsteroidal aromatase inhibitor.
Letrozole can be used after surgery to treat postmenopausal women with hormone receptor-positive early breast cancer, including those who have received approximately 5 years of tamoxifen therapy. Letrozole can also be used to treat postmenopausal women with advanced breast cancer. It can also be used to treat women who have gone through natural or artificially induced menopause who have breast cancer that has spread to other parts of the body and whose cancer has progressed following anti-estrogen therapy.
Letrozole fights breast cancer by inactivating an enzyme known as aromatase. This prevents the enzyme from supplying the estrogen that allows certain types of breast cancers to grow and survive.
This medication may be available under multiple brand names and/or in several different forms. Any specific brand name of this medication may not be available in all of the forms or approved for all of the conditions discussed here. As well, some forms of this medication may not be used for all of the conditions discussed here.
Your doctor may have suggested this medication for conditions other than those listed in these drug information articles. If you have not discussed this with your doctor or are not sure why you are taking this medication, speak to your doctor. Do not stop taking this medication without consulting your doctor.
Do not give this medication to anyone else, even if they have the same symptoms as you do. It can be harmful for people to take this medication if their doctor has not prescribed it.