Femara - Letrozole Tablets What is this medication? LETROZOLE (LET roe zole) treats some types of breast cancer. It works by decreasing the amount of estrogen hormone your body makes, which slows or stops breast cancer cells from spreading or growing. 315 Femara (letrozole tablets) is indicated for first-line treatment of postmenopausal women with 316 hormone receptor positive or hormone receptor unknown locally advanced or metastatic 317. Learn about side effects, cost, uses, and more of Femara (letrozole), which is a prescription drug that treats breast cancer in certain females. “I’m on my third year of Femara and am tolerating it well. I categorize my side effects as ‘inconsistent and somewhat annoying.’ For example; I have sporadic instances of calf and arch cramps; intense sweating, joint pain and stiffness — but never all at once and not day after day. Description Letrozole is used to treat certain types of breast cancer in women who have already stopped menstruating (postmenopausal). It is also used for women who have already had other cancer treatments (eg, tamoxifen). Female hormones that occur naturally in the body can increase the growth of some breast cancers. Letrozole works by decreasing the amounts of these hormones in the body. Femara (letrozole) is a brand-name prescription drug used for certain types of breast cancer. Learn about side effects, off-label use for infertility, and more. Femara lowers estrogen levels and is used to treat breast cancer in postmenopausal women. Learn about side effects, interactions and indications. Drug Summary What Is Femara? Femara (letrozole) is a non-steroidal aromatase inhibitor (lowers estrogen production) used to treat breast cancer in postmenopausal women. Femara is often given to women who have been taking tamoxifen (Nolvadex, Soltamox) for 5 years. Femara is available in generic form. What Are Side Effects of Femara? Visit resources tailored for our patient communities and their caregivers, including information around patient assistance, disease information and related resources. Find patient medical information for Letrozole (Femara) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings.