Just started my first dose last night and I was up till 4am because I felt so nauseous. I know side effects usually subside, I've always been sensitive to side effects. Had to stop taking Lithium because I could never get used to it. I'm on Lamictal as well. (150 mg) and don't have any problems. Just wondering how long side effects took to go away for most people? Walking around like a zombie today!