I remember years ago I was at the gym with a work buddy and we decided to try one of the drinks offered there, since we forgot our water bottles. We had the most amazing workout. We both executed personal bests, and after the workout we felt great. Much less tired than normal. At that point, I turned to the empty bottles and found it was chocked full of pseudoephedrine. It was a little scary to us, so we never did that again.

Yes, it is a powerful drug.