Phenobarb is the most common medication they use for epileptic dogs. It does work really well, but there are some things you need to be aware of. I think your best bet would be to find a forum for epileptic dog owners so people with a lot of experience can give you advice. I'll search around and see if I can find an active one.

I'm so glad she went to the vet. Hopefully things will become easier for the sweet girl.