When my girl was diagnosed she was put directly on Zonisamide. So no personal experience with a switch over. But that protocol is basically what we do for patients at my vet clinic that are switching.
Good luck. My girl is doing amazing on Zonisamide. She has been (I think) seizure free for well over a year. I say, I think, cause someone wet the bed about a month ago. It may have been her having a seizure when I was asleep, or my other dog who had a UTI. I don't know. But either way. Pretty good control.
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