all stackers contain the same amount of ephedrine and caffeine. its just the stacker 3 made u like shit more and i dont know what stacker 4 is supposed to do but all have 25mg of ephedrine and 200mg of caffeine.
holy shit i am flying right now. i cant stop talking or even sit still for a sec. feels like i just did like 5 lines of coke good shit so far, just like stacker 2