Sometimes, but not very often because I dont have any problem sleeping,,, I take 2000mg Concentrate Kava and 1000mg Valerian Root (Concentrated) gives me a nice mild buzz and then off to sleep... I would not recommend doing it all the time but after those extreme workouts it is sweet!!! Buy the way if someone knows where to get the concentrate versions of these I would like to know,,, It is very expensive at GNC>>>
Peace