I've seen the same thing as you for methamphetamine and amphetamine being "basically equivalent" but it was a study in rats. However, patients usually rate deso

I've seen the same thing as you for methamphetamine and amphetamine being "basically equivalent" but it was a study in rats. However, patients usually rate desoxyn (which is methamphetamine) higher (~10% higher) than either adderall or dexedrine (another amphetamine), and methamphetamine is supposed to be better at crossing the blood brain barrier. I'm not sure if I would call it equivalent/the same but they're very close. Especially this part: > The anticipated differences between them in their effect on the body and mind largely aren't real. You're totally right about that. People associate methamphetamine with drug abuse and amphetamine with people taking adderall, but I think it's a case where the dose makes the poison. For the abusers parts, I've found Simon et al, 2001 "A comparaison of patterns of methamphetamine and cocaine use", that would indicate doses of 500 mg, usually snorted instead of "eaten". As an anecdote, a friend that used to abuse amphetamine consumed around 300 mg a day.