If I have been taking stimulant x for about 7 weeks now, do you believe it has impacted my dopamine levels in a negative way? I watched that special on HBO about amphetamine abuse and it showed this guys brain on amphetamine use compared to a normal brain and it scared the shit out of me! He was 32 and had the brain of a 60 year old! From everything i have read one ingredient in stimulant x is chemically similar to a weak amphetamine.