Not exactly sure what's in it these days, but about a year or 2 ago I tried out these "Bath salts". Basically synthetic/knock-off coke/X. Went crazy for about 3-4 hours, and that was a small dose compared to what others were taking. Never did it again after.
Had a buddy fail a drug test for meth when that's the only thing he had in his system(At the time the no one in the area could find meth, so I doubt he lied and just did that). Couple of friends reported schizophrenic type side effects after binging on the shit, another developed chronic panic attacks, still persists to this day and he is triggered from just smoking bud, and especially doing any type of stimulant.
If binged on, this stuff could definitely cause brain eating behavior. It just puts you out of your mind completely. Hope this helps.