[Use of testosterone and anabolic androgenic steroids in sport].

Anabolic androgenic steroids (AAS) and testosterone are the most frequently detected prohibited doping agents in sport. Professional competitors have been taking them since the fifties of the 20th century, they are used at present mainly by sport amateurs. Anabolic Androgenic Steroids are very often used in combination with other doping agents (erythropoietin, growth hormone, thyroxin). Apart from desirable for athletes anabolic and anticatabolic properties AAS have many side effects. In extreme cases doping with AAS can be life-threatening.