I don't know much about pharmacology but I take Depakote and tolerate it well. I think it's relatively the same.....not too sure. If Lamictal doesn't work for you, perhaps you can discuss an alternative with your p-doc.
Keep in mind that any drug is going to list all sorts of side effects (bound by law). I eat grilled steak every week......that can't be too good for me either.

But it's yummy.