Unclear diagnosis
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Are you aware that deja-vu can be a seizure? It is a partial (simple partial) seizure and I think if you take it further it is comes under psychic seizure. Myoclonic jerks (non seiz) are often seen in people with E.
Unfortunately I am not on my comp. or I could give you some good links. I can give you one, I have put it on this board before. You can get many links from the site I am posting:
http://neuro-mancer.mgh.harvard.edu/cgi-bin/forumdisplay.cgi?action=topics&forum=Epilepsy&number=33&DaysPrune=1000&LastLogin=
Unclear, this could be a good resource for you,too. The people there are very nice and so helpful! It's a good support forum.
As far as meds effect on your son, maybe they just have to titrate him slower than most. That is how it was with me (but I am on Trileptal for Complex Partials). It was up and down, two steps fwd then one back. It took months (poss. over a year, but all the while getting a measure of control) to work up to the dose that controlled my seizures and it is still a low dose.
Good luck
http://brain.hastypastry.net/forums/forumdisplay.php?f=133
Linda