Finally a Trileptal person!!! I too, had problems with acne on Trileptal. At one point I got a very bad breakout on my upper chest, just under my neck... I thought it was a rash at first, but my pdoc didn't think so. It eventually went away, but I continued having problems with it on my back. I actually just went off the Trileptal after a year of taking it. I have been off of it for almost 2 weeks now. I am still having problems with my back, but that might be attributed more to the heat and me having long hair and wearing it down all the time... but as far as my face, I have had almost no acne at all since I stopped taking it.