I only tried clen once and it was while I was one a big cycle , I bumbed the does up 20mcg EOD till I got to 120mcg and two days after I got their I felt like I was gonna die and had to back down and come off , that took several days so I haven't messed with it sence but have heard that it works great and better than ephedrin for fat loss.
I have stopped using ECA stacks and been just using caffine and Yohimbe and I think its working as well , and it doesn't mess with my attitude like ephedrin does , not sure why but that shit gets me alot more irritable than normal