If I were to take 20-40mg of adderall xr once a week, will I risk neurotoxicity? I don't want to damage my dopamine receptors because they make me happy obviously lol. Also, I usually take the adderall with 1mg of xanax. If it could be detrimental, are there any supplements to mitigate damage (i have ala and vitamin C). Also, if once a week is too often, is there a frequency of usage that you would consider safe? Thanks!