In an ECA stack, ephedrine is dosed at 20-24mg for 3 doses taken for the duration of the day. Human research have discovered success with ephedrine in isolation on fat metabolism with doses of 20-50mg thrice an afternoon. The higher range (150mg) can be too stimulatory for some, and may result in headaches or light hand tremors. Ephedrine tends to be consumed with xanthine compounds like caffeine and once in a while with Aspirin. The aggregate of Ephedrine and caffeine is proven time and again to be extraordinarily synergistic.