Not shortly after Roger Maris record was broken, another baseball player, Jason Giambi and various other athletes were either suspected of, or proven to have, taken anabolic steroids. Again, Congress convened a hearing, and just as they did the first time in 1990, they did not determine that steroids were a danger, but rather that the danger was more in protecting professional sports organizations. The updated statute has been updated to proscribe pro-hormones also The definition of an anabolic steroid as defined currently in the United States under (41)(A) is that "anabolic steroid" means any drug or hormonal substance, chemically and pharmacologically related to testosterone (other than estrogens , progestins, corticosteroids, and dehydroepiandrosterone (7).
The most commonly used AAS in medicine are testosterone and its various esters (but most commonly testosterone undecanoate , testosterone enanthate , testosterone cypionate , and testosterone propionate ),  nandrolone esters (most commonly nandrolone decanoate and nandrolone phenylpropionate ), stanozolol , and metandienone (methandrostenolone).  Others also available and used commonly but to a lesser extent include methyltestosterone , oxandrolone , mesterolone , and oxymetholone , as well as drostanolone propionate , metenolone (methylandrostenolone), and fluoxymesterone .  Dihydrotestosterone (DHT; androstanolone, stanolone) and its esters are also notable, although they are not widely used in medicine.  Boldenone undecylenate and trenbolone acetate are used in veterinary medicine . 
Unlike many other 17-methylene, steroids oxandrolone is excreted largely unchanged and not conjugated in the urine. The major metabolites of Oxandrolons are 17-Epioxandrolon and 16-hydroxy metabolites.
On the German pharmaceutical market oxandrolone is not allowed. Under the trademarks Anavar, Lonavar or oxandrolone SPA, you can refer the drug in tablet form in the United States, Japan, Italy or Argentina relate. Doping cases in which oxandrolone have played a role and only became known in Germany for the first time by the high jumper Amewu Mensah.
The anabolic effect of oxandrolone occurs only when taken regularly over a longer period. No information has been disclosed about a performance-enhancing effect with an intake just before a competition. It can be perfectly detected over 72 hours after ingestion.