Both Femara and Arimidex are used to treat hormone receptor-positive breast cancer in postmenopausal women. They both belong to the class of nonsteroidal aromatase inhibitors (NSAIDs), but they differ in their active ingredients and some pharmacological properties.
Femara Tablets Ingredients
Femara Tablets contain the active ingredient letrozole. Letrozole is an aromatase inhibitor that works by blocking the aromatase enzyme, which is responsible for converting androgens to estrogen in the body. By reducing estrogen levels, letrozole helps slow or stop the growth of some types of breast cancer that depend on estrogen for growth.
Arimidex Tablets Ingredients
Arimidex Tablets contain the active ingredient anastrozole. Anastrozole is also a NSAID that works similarly to letrozole by blocking the aromatase enzyme and reducing estrogen levels in postmenopausal women with hormone receptor-positive breast cancer.
Information about Femara tablets
Drug class: Aromatase inhibitors
Drug classification: Nonsteroidal
Pharmaceutical form: Coated tablets
Pharmaceutical family: Oncology drugs
Active ingredient: Letrozole
Information about Arimidex tablets
Drug class: Aromatase inhibitors
Drug class: Nonsteroidal
Pharmaceutical form: Coated tablets
Pharmaceutical family: Oncology drugs
Active ingredient: Anastrozole