The only seizure diet I've heard of is called The Ketogenic Diet if you're
doing searches.  It works best for Kids, but some adults can use it too.
Discuss with your Doctor.
  It's very high in Fats, and strict.   The higher fat content produces a
state called Ketosis (thus the name).   Similar talk (convention) I
discussed elsewhere wrt. Seizure Dogs, had a speaker on it.   They also
weren't sure why this one worked, but suspected that the higher Digestion
Work required seemed to occupy the brain and dampen SOME types of electrical
activity that could be precursor of seizure activity.
   That was my interpretation of what was said.  There have been 1-2
posters here about 4 years ago who found it worked well for their kids as
their matured up to puberty.  After that they had to move to pills.
   I haven't used either of the ones you list below, but if those doses
were Tegretol (they're NOT!!),  that would be a High dose, and the Fat
Ketosis thing likely would require you to eat a large Brick of Animal Fat a
day to get same effect.
   There are others around here, who are using those pills, and they can
probably give you better input on Whether the Ketogenic Diet is applicable
for your type of seizures.   Also under http://efa.org   the Ep. Foundation
of America site, there's likely articles on the above Diet, with a list of
which Types of seizures it would work for -- it may Not be one that's
successful with your type, or it Could be.
   Check that site for information, until some others come online (it's
only 6AM in West Coast of N.America right now).   I'm sure there are others
around who have used it or still are and would have any Direct links that
efa site doesn't point at.  G.R. /