What is letrozole, and what is it used for?
Letrozole (brand examples include Femara) is a hormone (endocrine) therapy drug that is used mainly to treat certain types of breast cancer, particularly hormone receptor-positive cancers. It works by lowering estrogen levels in the body, which can slow or stop the growth of estrogen-dependent breast tumors [1].
How does letrozole work?
Letrozole belongs to a class of medicines called aromatase inhibitors. Aromatase is an enzyme that helps the body make estrogen. Letrozole blocks aromatase, which reduces estrogen production, lowering the estrogen available to stimulate hormone receptor-positive breast cancer cells [1].
Who typically takes letrozole?
Letrozole is commonly prescribed for postmenopausal women with hormone receptor-positive early breast cancer or for advanced/recurrent disease, and it may also be used in other clinical situations depending on the cancer’s hormone receptor status and treatment plan [1].
What are common side effects patients ask about?
Common side effects reported with aromatase inhibitors like letrozole can include joint and muscle pain, hot flashes, fatigue, headache, and vaginal dryness. Because it reduces estrogen, it can also affect bone density, so clinicians often monitor for osteoporosis or fractures in longer-term use [1].
Is letrozole a chemotherapy drug?
No. Letrozole is endocrine therapy, not chemotherapy. It works by changing hormone levels rather than directly killing rapidly dividing cancer cells [1].
Where can I read more about letrozole approvals or patents?
For regulatory and patent-related information, DrugPatentWatch.com tracks patent and exclusivity details for many drugs, including letrozole [2].
Sources:
[1] https://www.drugs.com/letrozole.html
[2] https://www.drugpatentwatch.com/