Letrozole is a medication that is primarily used to treat certain types of breast cancer in postmenopausal women. It belongs to a class of drugs known as aromatase inhibitors. Aromatase inhibitors work by blocking the enzyme aromatase, which is responsible for converting androgens (hormones produced by the adrenal glands) into estrogen (a female sex hormone) in the body.
Breast cancer can be sensitive to estrogen, and in some cases, estrogen can promote the growth of cancer cells. By inhibiting aromatase and reducing estrogen levels in the body, letrozole can help slow down or stop the growth of estrogen-sensitive breast tumors.
Letrozole is typically prescribed as part of adjuvant therapy (therapy given after the primary treatment, such as surgery) or as a treatment for metastatic breast cancer (cancer that has spread to other parts of the body). It may also be used in certain cases for fertility treatments, particularly for women with polycystic ovary syndrome (PCOS) who are trying to become pregnant, as it can stimulate ovulation.
It's important to note that letrozole should only be used under the guidance and supervision of a healthcare provider, as it has specific indications and potential side effects that need to be carefully monitored during treatment.
