Oxcarbazepine
"I've been on Depakote, Lithium and now Trileptal.  Trileptal has given me absolutely no side effects, no weight gain and it controls my mood.  I was bumping into walls, throwing up, feeling like I was high and eating everything in sight on Depakote.  I gained so much weight.  On Lithium, I did well, but couldn't deal with the gastrointestinal issues, as well as urinating every other hour, and being thirsty all the time.  Nothing quenched my thirst.  This medicine is like taking a vitamin and it has stabilized my moods for almost 5 years now."