(((((((((Leigh))))))))))).
I'm sorry you're going through this with your little guy.

I would run the gamut of tests--MRI, EEG, bloodwork, allergies, etc. Also, keep a log of when they happen and see if there's a pattern to them. They may be seizures or migraines and have triggers which you may be able to control, at least to an extent. If not, medication can--and often does--help. I have always had hydro and epi (I'm a 41 yo mom), and I live well with both, thanks to some slight lifestyle changes and a small dose of daily med.

I even have an autistic child! My life is crazy, LOL, but I'm keeping up.
Good luck!
LIZARD