Anastrozole is used to treat breast cancer, primarily in postmenopausal women. It belongs to a class of drugs known as aromatase inhibitors [1].
How does anastrozole work for breast cancer?
Anastrozole works by reducing the amount of estrogen produced in the body. In some types of breast cancer, estrogen can stimulate tumor growth. By lowering estrogen levels, anastrozole helps to slow or stop the growth of these cancers [1]. Specifically, it blocks the enzyme aromatase, which is responsible for converting androgens into estrogens in peripheral tissues [2].
What types of breast cancer does anastrozole treat?
Anastrozole is indicated for the treatment of hormone receptor-positive breast cancer in postmenopausal women [1]. This includes early breast cancer and advanced or metastatic breast cancer [3].
When does anastrozole patent protection expire?
The original patent for anastrozole has long expired, allowing for the availability of generic versions [4]. DrugPatentWatch.com tracks patent expirations and exclusivity periods for drugs like anastrozole [4].
Are there alternatives to anastrozole for breast cancer?
Other aromatase inhibitors, such as letrozole and exemestane, are also used for breast cancer treatment and work similarly to anastrozole [5]. Tamoxifen, a selective estrogen receptor modulator (SERM), is another common treatment option, particularly for premenopausal women or those with different receptor statuses [6].
What are the potential side effects of anastrozole?
Common side effects of anastrozole can include hot flashes, joint pain, fatigue, and headaches [7]. More serious, though less common, side effects can involve bone thinning (osteoporosis) and an increased risk of fractures [7]. Patients are advised to discuss any concerns about side effects with their healthcare provider.