I am not completely sure what happened to me on Lamictal, but it may have put me in a hypomania/mixed episode or at least did not help stop that. I am feeling better as I titrate off it, but maybe too soon to be sure. My mood swings felt much worse and at the very least it definitely seemed to mess with my sleep cycles. I know that's not really an especially typical response, but that's what seemed to happen to me.