Trileptal is off label for BP, but it's used pretty frequently. It's apparently the new improved version of Tegretol, with fewer side effects. Topomax is also used off label, but it's gotten the nickname of dopomax because it causes cognitive issues in a fair number of people. It does tend to make you lose weight, though. I personally would go for Trileptal above Topomax, but I'm doing fine on Lamictal so it's a bit of a moot point.