methasterone methasterone methasterone, also known as methyldrostanolone and known by the nickname superdrol, is a synthetic and orally active anabolic–androgenic steroid (aas) which was never marketed for medical use. it was sold legally for 9 years as a body building supplement. because of this lengthy time being legal it has more studies and references than most other designer steroids. methasteroneclinical dataother namessuperdrol; methyldrostanolone; methasteron; 2α,17α-dimethyl-4,5α-dihydrotestosterone; 2α,17α-dimethyl-dht; 2α,17α-dimethyl-5α-androstan-17β-ol-3-oneroutes ofadministrationoraldrug classandrogen; anabolic steroidatc codenonelegal statuslegal status us: schedule iii pharmacokinetic databioavailability~50%metabolismliverelimination half-life8–12 hoursexcretionurineidentifiers iupac name (2r,5s,8r,9s,10s,13s,14s,17s)-17-hydroxy-2,10,13,17-tetramethyl-2,4,5,6,7,8,9,11,12,14,15,16-dodecahydro-1h-cyclopentaphenanthren-3-one cas number3381-88-2 ypubchem cid237186chemspider207079 nuniigh88dy98mrcomptox dashboard (epa)dtxsid10187472 chemical and physical dataformulac21h34o2molar mass318.501 g·mol−13d model (jsmol)interactive image smiles o=c2c1cc3(1(c)c2c)cc4(3cc4(o)c)c inchi inchi=1s/c21h34o2/c1-13-12-19(2)14(11-18(13)22)5-6-15-16(19)7-9-20(3)17(15)8-10-21(20,4)23/h13-17,23h,5-12h2,1-4h3/t13-,14+,15-,16+,17+,19+,20+,21+/m1/s1 nkey:qcwcxsmwljfbnm-fovybzidsa-n n ny (what is this?) (verify) medical uses methasterone was never a commercially available prescription drug. its non-17α-alkylated counterpart, drostanolone propionate, was commercialized by syntex corporation under the brand name masteron. non-medical uses methasterone resurfaced in 2005 as a “designer steroid”. it was brought to market by designer supplements as the primary ingredient of a dietary supplement named superdrol. its introduction into commerce may have represented an attempted circumvention of the u.s. anabolic steroids control act of 1990 (along with its 2004 revision), since the law is, in part, drug-specific; methasterone, as is the case with many designer steroids, was not declared a schedule iii class anabolic steroid in that act because it was not commercially available at the time the act, and its subsequent revision, were signed into law. methasterone was therefore being sold as an over-the-counter dietary supplement. side effects