Methasterone, commonly known as Superdrol, is a designer steroid often regarded as a “super” version of Anadrol due to its potent anabolic and muscle-building effects. Known for promoting significant mass gains without water retention, Superdrol is considered one of the most effective oral steroids for bulking.

Developed in 1956 by Syntex, the same pharmaceutical company behind Anadrol and Masteron, Superdrol was initially created in a search for an azo compound (containing two nitrogen atoms) with potential anti-tumor properties. However, it was later misrepresented and sold as a pro-hormone to circumvent the Steroid Control Act of 1990. Originally available as an over-the-counter dietary supplement, the FDA issued a warning in 2005, identifying methasterone (Superdrol) as an unapproved steroid compound. As a result, it was pulled from the market and has never been approved for medical use, now only available through the black market.