if u guys really want something powerful, razor8 by allmax is hands down the best. my friends are stimulant junkies and they take naps with jack3d.. if razor8 does the trick for them and jack3d makes them sleepy, then i think razor8 is crazy

as for myself, i stopped 2 weeks ago of using preworkout drinks.. been on it for 2 years and tried everything, i just cant get use to it.. i always get wired and have troubled sleep..

any preference on non stimulant preworkouts???