Dianabol is the most recognized trade name for the drug methandrostenolone, also referred to as methandienone in many countries. Methandrostenolone is a derivative of testosterone, modified so that the hormone’s androgenic (masculinizing) properties are reduced and its anabolic (tissue building) properties preserved. Having a lower level of relative androgenicity than testosterone, methandrostenolone is classified as an “anabolic” steroid, although quite a distinct androgenic side is still present. This drug was designed, and is principally sold, as an oral medication, although it can also be found in a number of injectable veterinary solutions. Dianabol is today, and has historically been, the most commonly used oral anabolic/androgenic steroid for physique and performance-enhancing purposes.