Me and my Dr. are experimenting with my doses, I am now on 100 mg of wellbutrin sr and 10 mg of prozac each morn. I have been on this combination for a few years but cant seem to find a happy medium, I feel good all through the day but my energy level takes a dip early evening. I want to start taking another 100 mg of wellbutrin in the afternoon but im scared it will interfere with my sleep. NOTE: I did try the 150 mg xl but could not sleep at all, so went back to the sr. any comments would be usefull.