I currently take Lamictal and Wellbutrin. Lamictal is probably the only decent medication I've ever taken for BP 1. It wouldn't help with a maniacal state but if you take it during depression it levels you out well, and I haven't felt maniacal since. So far, it's been over a year since I've felt out of control.
The only immediate side effect I experienced were headaches. Otherwise, it only seemed to impair my spelling and ability to use language effectively for 5-6 months. It's possible that I'm still impaired but you forget about how smart you were at some point. 200 mg of Lamictal has worked well for me so I would suggest giving it a shot.