Mebolazine
Mebolazine is a synthetic, orally active androgen/anabolic steroid and a 17α-alkylated derivative of dihydrotestosterone which is no longer marketed. It has a unique and unusual chemical structure, being a dimer of methasterone linked at the 3-position of the A-ring by an azine group, and reportedly acts as a prodrug of methasterone.
Since 2008, mebolazine has been used illegally as an ingredient is some dietary supplements, including vitamin B supplements, and in the United States the Food and Drug Administration has taken legal action against such manufacturers.
