I added a link to my first reply after going out to do a bit of research.I'll be calling the vet. He'll want to do another blood draw and analysis. We may have to increase or add a second medication. If there's a good side to all of this, her seizures are less violent, and she seems to recover more rapidly. It's stressful . I think more so for the Princess and me than for Maggie.
I had used milk thistle and some other supplements to treat Dylan in conjunction with his prescriptions to help with his DCM. He had a worse disease though and he died 6 months after diagnosis.