No she's an indoor dog mostly and doesn't go out unsupervised.  We give her water from the Brita filter so that should be ok.  Otherwise nothing I can think of.  I'll see what the vet says this week.

IIRC, the pheno is pennies per day.  I investigated adopting a dog that required it.  Ended up not adopting the dog for other reasons - it was very agressive towards and much larger than my then-girlfriend's two beagles.

Our dog started having seizures about a month ago. He was having one about every eight hours and they were horrifying, after he would get up and start cruising around crashing into shit for about an hour after. He stayed at the vet for a day and came home with some pills, phenobarbital, that pretty much made him a zombie. We thought about putting him down because he was so screwed up. They also sent home Valium to stop a seizure and help prevent them. You inject that in the dogs ass with a teat on a syringe. My wide [haha sweet typo should be wife] picked up some herbal crap to try instead of the phenobarbital and we had the vet give us something different for daily dosage. They gave us something new, (forgot what the name is) and his seizures have gone from a full on crappie flop to a few days later just some flapping of his mouth and he only has them about once a day now if that. The doc said his are probably caused by a tumor or something behind his eye. He's pretty much back to normal for a 15 year old dog.

And if one happens on phenobarbital you can increase the dose and there are lots of other drugs available.

Phenobarbital is just inexpensive and usually effective.

Had a Lab that was immediately spayed (it may NOT breed out) and on phenobarbital for many years (IIRC 60 mg once a day).
Lived to a month short of 13 years.

Before she was treated she would act confused and once fell down a staircase.

And hope dog does no injure itself in the meantime.

Often low doses of phenobarbital are effective and produce no side effects.
the problem is that the dog is likely having them when no one is around to detect them.
If they are not Grand Mal with loss of bladder and bowel control you have no real idea how often they are happening.

Dogs are not noted for their ability to report symptoms.

Could also be a blood problem.  Get your dog checked out.