Stanozolol, commonly sold under the nameWinstrol(oral) andWinstrol Depot(intra-muscular), was developed byWinthrop Laboratoriesin1962. It
is a syntheticanabolic steroidderived fromtestosterone, and has
been approved by theFDAfor human use.
Unlike most injectable anabolic steroids, Stanozolol is not
esterified and is sold as anaqueoussuspension, or in oral tablet
form. The drug has a large oralbioavailability, due to a C17α-alkylation which allows the hormone to survive first
passlivermetabolism when ingested. It is because of this that
Stanozolol is also sold intabletform.
Stanozolol is usually considered a safer choice for female
bodybuilders in that it rewards a great amount of anabolism for a
small androgenic effect, however virilization and masculinization
are still very common, even at low doses.
Stanozolol has been used on both animal and human patients for a
number of conditions. In humans, it has been demonstrated to be
successful in treatinganaemiaandhereditary
angioedema.Veterinariansmay prescribe the drug to improve muscle
growth, red blood cell production, increase bone density and
stimulate the appetite of debilitated or weakened animals.
Stanozolol is one of theanabolic steroidscommonly used as
anergogenic aidand is banned from use in sports competition under
the auspices of theInternational Association of Athletics
Federations(IAAF) and many other sporting bodies.
Stanozolol has also been used in UShorse racing.