Most stuff to me is just too weak - but I was using stims in the 80s when nobody had a clue. I need pure ephedrine hydrochloride 25-50mg no extract or herb will touch me , then the typical 200 mg caffiene , 300mg aspirin per 25 EPh to counteract the reactions . I do try or add pure forms of the newer stuff but I like the yellow jacket caps stacked -maybe the herbs extends the chem part - magnesium always adds to my power and prevents cramping 200-400 magnesium aspartate.
I've tried evey solitary formula out don't touch me alone. I do cycle my stims 5 on 2off take 2 weeks off every 3 months past 27 years.
I will look for some stuff that's new I may not know so post up anything newer you all think of