I recently tried 50mg of dextroamphetamine, and whilst I was definitely high I never felt a rush or any sort of overwhelming euphoria. My friend did 30mg and he was far more wired than I was. I did some reading and have seen that amphetamines have a cross tolerance with mdma, now I have done A LOT of mdma in the past but not for about 2-3 months, is it possible this has led to some kind of permanent amphetamine tolerance now?