depends on where you buy it from, I think. They don't sell it anywhere around here. Look online. The first few times, it did nothing for me. But this place seems to have good stuff: http://www.bouncingbearbotanicals.com/
I hear the DEA has it's eye on kratom--always looking to ruin someone's buzz....but I don't know why. It's pretty weak shit. Really, no one's life is going to be ruined by kratom...but it'll chill you out a little, if you're lucky.
no idea what PST or WD is.