Captagon or Fenethylline 50mg was first manufactured in 1961. This was as an alternative to amphetamine and methamphetamine used at the time to treat narcolepsy. Also, it was for fatigue, and the behavioral disorder “minimal brain dysfunction”.
Dexamphetamine was already being used by the military to enable soldiers to stay awake for long periods of time and to “enhance courage and bravado”. Thus, Captagon was supposed to be a milder version of these medicines.
But by the 1980’s the U.S. government declared it a controlled substance with no currently accepted medical use.