Generic Version of Tegretol and symptoms

My wife has a partially treated AVM (left ventricle) (6 embos and 2 rounds of GK) - as a wonderful side effect, she developed a seizure disorder back in 1997. After Dilatin disagreed with her, she finally settled on Tegretol. Last year our insurance co started sending the generic version as a substitute and she has noticed a difference in the way she feels - more nervous, anxious......

On a separate but maybe related note, she started experience flashes of light in her (right eye) peripheral vision last week. Comes and goes along with some blurriness and even some loss of vision. These symptoms were usually related to a seizure but she hasnt had one in almost 6+ years.

So two questions:

Has anyone experienced the Tegretol issues i described?

And second has anyone experienced these symptoms?