I take Topamax, too. It's used off-label as a mood stabilizer. According to my pdoc, it's considered, "a weak mood stabilizer with antidepressant qualities".

Lithium, Depakote, Geodon, Tegretol, Neurontin, Trileptal, lamictal (which I also take), and Latuda are all mood stabilizers. Some anti-psychotics and atypical antipsychotic meds are also used as mood stabilizers. I'm sure there are other meds that I'm not aware of, too.

I'm not recommending you take a particular med. I'm just suggesting it may be something worth talking to your doctor about if he refuses to increase your Risperdal.