lately i have stopped using ephedrine and yohimbe as the crash and jittery feeling just outweighs the benefit...so now im just using caffeine, 100 or so mgs at a time..it gives me a good boost of energy but no cognitive boost like ephedrine or other stims...plus, with caffeine after an hour or so i crash hard and it makes me jittery and just plain feel shitty...low motivation and mood, increased anxiety..is there any way to avoid the jitters and the crash while taking stims like caffeine and ephedrine?besides taking benzos or other downers..?ive tried getting off all stims but then the lethargy kicks back in and i get back on etc etc..