Letrozole (Femara) is a reversible aromatase inhibitor that is noted as the most potent nonsteroidal AI. It is one of the three most used aromatase inhibitors by steroid users to control side effects related to estrogen as a result of the use of aromatizing steroids (the other two common AIs being Arimidex – nonsteroidal, and Aromasin – steroidal).

Letrozole is a drug that will appeal to users of the most popular aromatizing steroids such as Testosterone, Dianabol and countless others where the development of water retention, high blood pressure and gynecomastia are serious concerns