Anastrozole is a non-steroidal aromatase inhibitor (AI), similar to [letrozole], used to decrease circulating estrogen levels in the treatment of postmenopausal women with estrogen-responsive breast cancer.[L8863] Anastrozole is also related to [exemestane], …

Letrozole, or CGS 20267, is an oral non-steroidal type II aromatase inhibitor first described in the literature in 1990.[A190543,A1559,L11623,L11626] It is a third generation aromatase inhibitor like [exemestane] and [anastrozole], meaning it does not signifi…

Tamoxifen is a non-steroidal antiestrogen used to treat estrogen receptor positive breast cancers as well as prevent the incidence of breast cancer in high risk populations.[A1025,L7799,L7802] Tamoxifen is used alone or as an adjuvant in these treatments.[L77…