Detection time: up to 45 days* *- approximate drug concentrations at various dosages Methyldrostanolone (Also called Methasterone or Superdrol), chemically known as methasterone or 17a-methyl-drostanolone, is a well-known and popular substance for most strength athletes and bodybuilders. It is a powerful oral steroid that has never approved for medical use, but widely use in bodybuilding and other sports. In its structure it is very close to drostanolone but it has the complementary c-17 alpha methyl group, a mod that gives this steroid widespread oral availability. C-17 alpha-alkylation changes the character of the steroid often, but in this particular case it does not.