Methylclostebol, also known as 4-chloro-17α-methyltestosterone or as 4-chloro-17α-methylandrost-4-en-17β-ol-3-one, is a

synthetic Synthetic things are composed of multiple parts, often with the implication that they are artificial. In particular, 'synthetic' may refer to: Science * Synthetic chemical or compound, produced by the process of chemical synthesis * Synthetic o ...

orally active Oral administration is a route of administration where a substance is taken through the mouth. Per os abbreviated to P.O. is sometimes used as a direction for medication to be taken orally. Many medications are taken orally because they are in ...

anabolic-androgenic steroid Anabolic steroids, also known more properly as anabolic–androgenic steroids (AAS), are steroidal androgens that include natural androgens like testosterone as well as synthetic androgens that are structurally related and have similar effects t ...

(AAS) and

designer steroid A designer drug is a structural or functional analog of a controlled substance that has been designed to mimic the pharmacological effects of the original drug, while avoiding classification as illegal and/or detection in standard drug tests. Des ...

that has been sold on the Internet as a "

dietary supplement A dietary supplement is a manufactured product intended to supplement one's diet by taking a pill, capsule, tablet, powder, or liquid. A supplement can provide nutrients either extracted from food sources or that are synthetic in orde ...

", but it has never been studied for medical use. It is the 17α-alkylated variant of

clostebol Clostebol (; also known as 4-chlorotestosterone) usually as the ester clostebol acetate, is a synthetic anabolic–androgenic steroid (AAS). Clostebol is the 4-chloro derivative of the natural hormone testosterone. The chlorination prevents conve ...

(4-chlorotestosterone).Lootens, L., Van Eenoo, P., Pozo Mendoza, O. J., Meulemans, P., Leroux-Roels, G., & Delbeke, F. (2010). Application of in vivo urinary steroid detection in uPA+/+-SCID chimeric mice. In 28th Cologne workshop on Dope Analysis (Manfred Donike workshop) (Vol. 18, pp. 52-61). Sportverlag Strauss. Rahnema, Crosnoe, and Kim (2015) reported that German athletes used methylclostebol as a

performance enhancing drug Performance-enhancing substances, also known as performance-enhancing drugs (PEDs), are substances that are used to improve any form of activity performance in humans. A well-known example of cheating in sports involves doping in sport, where ban ...

in the 1960s and 1970s, but this has not been substantiated. The compound is listed as a banned anabolic agent by the

World Anti-Doping Agency The World Anti-Doping Agency (WADA; french: Agence mondiale antidopage, AMA) is a foundation initiated by the International Olympic Committee based in Canada to promote, coordinate, and monitor the fight against drugs in sports. The agency's k ...

References

{{Androgen receptor modulators Androgens and anabolic steroids Androstanes Designer drugs Organochlorides World Anti-Doping Agency prohibited substances

See also

References