I'm sure these herbal highs are just as bad for you as the non-legal stuff. I actually feel far worse if I pump my body full of caffiene (when I've been tired, had exams etc) than on a night out clubbing!
Normally I'd say yes but I always feel absolutely fine the next day - and Tuesdays roll by unnoticed as well.
F*** lucozade and red bull - try the legal highs you can buy over the counter.