Letrozole, or CGS 20267 is annon-steroidal type II aromatase inhibitor first described in the literature in 1990.1,5,9,10 It is a third generation aromatase inhibitor like exemestane and anastrozole, meaning it does not significantly affect cortisol, aldosterone, and thyroxine
Letrozole 1.5mg/mL
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Aromatase is an enzyme that works to help produce the hormone estrogen. Some cancers use estrogen to grow. By inhibiting aromatase, these estrogen-driven cancer cells may stop growing.