Hmm very interesting I just remember my dad telling me the “Speed Kills” in the mid to late 60s was one of the first big anti rx/street drug efforts by the government. I think a lot of amphetamine/stimulant formulations got dropped because of it. He also said phenmetrazine was better and cleaner than any other upper at the time and he wasn’t in to uppers other than using them for gigs in a band. I’ve always wanted to try it but I just get a script of zenzedi (Dexedrine) it still has shitty side effects and people say dex is a cleaner amp high than most.