What is the difference between dextromethorphan and dxm usp?!
Question: What is the difference between dextromethorphan and dxm usp?
Answers:
Best Answer - Chosen by Voters
Nothing at all. USP is just a measurement standard.
Also, since I'm almost certain you're asking this because you want to trip out on it, try Salvia Divinorum instead. It's legal, and you don't have to deal with the sh*tty effects that DXM has.
nothin its the same thing.