Letrozole is a medication primarily used in the treatment of hormone receptor-positive breast cancer in postmenopausal women. It functions as an aromatase inhibitor, which reduces the production of estrogen in the body. By lowering estrogen levels, Letrozole can help slow or reverse the growth of hormone-sensitive tumors.
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How Letrozole Works
Letrozole inhibits the aromatase enzyme, which is responsible for converting androgens into estrogens in peripheral tissues. This process is critical due to the role of estrogen in the growth of certain types of breast cancer.
Indications for Use
- Postmenopausal women with hormone receptor-positive breast cancer.
- Adjuvant treatment following primary surgery.
- Treatment of advanced breast cancer in women who have received prior anti-estrogen therapy.
Dosage and Administration
Letrozole is typically administered orally, with the standard dose being 2.5 mg once daily. The treatment duration can vary based on the specific clinical scenario, but it often continues for five years in adjuvant settings.
Potential Side Effects
Like all medications, Letrozole can cause side effects, which may include:
- Hot flashes
- Joint pain
- Nausea
- Fatigue
- Bone density reduction
Conclusion
Letrozole plays a crucial role in the management of hormone receptor-positive breast cancer among postmenopausal women. Understanding its mechanism, usage, and potential side effects can help patients make informed decisions about their treatment options.