methamphetamine stimulates the cns for a long time. much longer and much stronger than other stimulants. even at low doses it will likely cause sleep distubances every time you use it. and we all know that a good nights sleep is very important for memory consolidation and organisation. using meth as a study ais is a bad idea all around. amphetamine,adderal,modafinil are all better and less toxic for the brain.Reason I got meth in the first place was cause I was advised that regular amphetamine is mostly crap and that meth would be of higher purity/quality.
I was investigating more so my response to stimulants as study aids etc.
At this point it seems buying regular amphetamine sulphate and performing an acetone wash (which between gathering the paraphernalia and ensuring I get anhydrous acetone - sounds like a huge pain in the ass), but that may be a better route than long'ish term experimentation with low dose meth.