hey bro clen i tryed twice now both times it made me way tired believe it or not, I even left the gym once after 1 exercise because I was exhausted, its very weird with me and clen, as for asparin i have 325mg asparins, i use to use the whole thing til I would bleed when going #2 so now I cut it in less then half, so i take aprox140mg give or take a few cuase i they break weird each time, also I have sen studies that support exactly what dragonrider says about the increase in fat loss long after you get jitters and it feels as though it isnt doing anything, and i also can speak from experience and say long term use works as if not more effective as DR said above, I also cant take yohimbi, makes me very very nausiouse as well and beet red!