It can lead to real opiate-like high if you take a lot. You have to relax and lie down to really get that going. If taken more often it will just keep you awake, better than ephedrine. It quickly builds up tolerance and you can get a little addicted to the subtle soothing effects. However the addiction potential in my experience seems to be rather low. I have taken it for weeks in a row and then just quit because it got on my nerves (because it kept me awake all the time). If there were any severe addiction potential I assure you I would have noticed.