Letrozole is one of the most powerful synthetic drugs in the category of aromatase inhibitors. Among athletes, it has found widespread use as a drug that prevents oestrogenic side effects. Basically, its course of application is carried out in conjunction with the intake of steroids to block aromatization (conversion of testosterone into oestrogens), which can lead to male gynecomastia (enlargement of the breast tissue, also known as the mammary glands), high blood pressure, accumulation of excess fluid within the body and acne.
