They are sold in vials, and look like coke. Apparently they give an intense euphoric high, and the side effects of course include paranoia, hallucinations, etc.
Why am I saying all this? Well I think a lot of you all know I work in an ER, and this week we had two overdose deaths presumably from bath salts (NOT POLYSUBSTANCE ABUSE, BATH SALTS ONLY). We have also had multiple admissions both psychiatric and medical, from bath salt abuse. I can say for a fact even though its only anecdotal, that these bath salts are no good. Im not your local bimbo news anchor, so im not going to use scare tactics or lies to convince anyone. However, I am saying I have seen with my own two eyes that this shit can fuck you up. Our docs dont seem to know how to treat it, and some of the side effects and medical issues have been lasting weeks. It honestly reminds me a lot like taking care of someone on PCP. The only thing is that these chemicals seem to be causing organ failure and death as well.
Anyways, consider that a PSA or something, if you are ever given the choice, I personally believe this would be one of those things that would not even be good in moderation.