5-ME-DMT is also known as "the chemical terror." the name pretty much warns you. But as far as I know, it is legal in the states and can be obtained from some (shady) chemical supply companies with few questions asked.
BTW, I stay away from coke, heroin, and PCP for sure. I have tried weed, lsd, xtc, shrooms, and ketamine. That stuff is pretty much behind me, though I'd definately do Peyote under the right circumstances.