METHANDROSTENOLONE
Oral 17α-alkylated anabolic-androgenic steroid (Dianabol) used for rapid muscle mass and strength gains.
Methandrostenolone was developed in the 1950s and became one of the most widely used oral anabolic steroids, originally prescribed for osteoporosis, rheumatic diseases, and catabolic states. Studies in castrated rats demonstrated thymolytic effects and specific androgen-receptor binding in thymic tissue, confirming its androgenic mechanism. Metabolism studies identified multiple hydroxylated metabolites and a 6β-hydroxylation pathway, with long-term high-dose use leading to detectable unmetabolized drug in urine. Evidence for performance enhancement is largely anecdotal and from illicit use; controlled clinical trials for athletic performance are lacking, and the drug's hepatotoxicity has limited its legitimate medical use.