Certainly was too high!   Was really a last ditch attempt to try for
control using monotherapy.  Had previously tried combinations of
Tegretol/Lamictal & Tegretol/Neurontin with very poor results.  IIRC
1600mg was the maximum my GP could prescribe, but can go up much higher
under the supervision of a neurologist.

I was only at 2x 400mg Tegretol per day (160 lbs/70kg)-- so total 800mg.
When I had more seizures, rather than increase the Tegretol CR dose, my
Neuro **slowly (over 8 weeks) phased out the night time dose (400mg)
Tegretol.  About week 4 of that phase-out, we added half a tablet of a new
adjunctive med. that had just been approved in Canada (5mg Clobazam =
Frisium) for Complex Partial? Seizures.   When I had some more szrs. we
upped that to a full tablet at bedtime (10mg).
   When I had more seizures ~6 months or longer later, we added 5mg (half a
tablet) *with the Morning Tegretol of 400mg, to finally a full tablet then
too (10mg Frisium).   That was about 1996, and was the last time I've had a
Med. or Dose change (8 years).
   Fwiw, at onset (1993) my Neuro told me I could expect 2-3 szrs. per
month, because of MRI etc. tests that showed my szrs. came from damage in
Right Temporal Lobe.  So 0 a year compared to 24 is pretty good.

   I was *never above 800mg per day of Tegretol, and expect that such a
high dose (even with the weight), might produce a Foggy sensation or affect
alertness.   But we have had a few people posting who only were using
Tegretol and were between 800 and 1200 mg.   Like Daz n Pat say below,
without being Doctors, that seems a fairly strong dose unless there are more
seizure problems than we could know about.

   You could ask the Dr. whether there might be a Second med. you could use
WITH the Tegretol but with Lower Tegretol dose, and slowly phase Down the
Tegretol dose to get better control?  My Frisium (for example) is listed as
'for adjunctive therapy', so it's not intended to be used alone, but with
e.g. Tegretol or other Anti Ep. Drugs.
  There might be others approved where you are, that could allow lowering
Tegretol slowly but w. maximum control.

   (Some people can't even use Tegretol because of reactions with it, or
might have other reactions that require them to reduce it or monitor it
closely.   Tegretol, for example, is also used by people who have had Stroke
s and some other 'elderly conditions' unrelated to Epilepsy. )  G./