I've taken
11 tablets per day for a few days mid-cycle, as I tapered up and then back down. Only sides I got were the usual, some sweating, shaky hands, lowered appetite, and a slight elevation in temperature of about 1 degree. If it makes any difference, I weigh 195 w/12.5% bf.
I am not sure about the instances of clen being faked, but if it comes in the original packaging box (Novegam, Spiropent, etc.) then I wouldn't think it would be worth all the trouble and potential problems of scamming someone over clen. Just my .02 cents.
DP