Mestanolone was first synthesized in 1935 along with methyltestosterone and methandriol .   It was developed by Roussel in the 1950s and was introduced for medical use, under the brand names Androstalone and Ermalone, by at least 1960.    It was marketed in Germany .  The drug was originally thought to be a potent anabolic agent, but subsequent research showed that it actually has relatively weak anabolic effects and is mostly an androgen.  Mestanolone was used as a doping agent in athletes competing in the Olympics from East Germany due to a state-sponsored doping program in the 1970s and 1980s.  Its value is said to have been less as a muscle-builder and more as an androgen in the central nervous system and neuromuscular interaction , improving speed, strength, aggression , focus , endurance , and stress resilience .  Today, mestanolone has mostly been discontinued in medicine, though it is still available in Japan .