OH POOR DERRICK!!! what a day!!! man!!!

and no picnic for you either!!!
i agree it might just be that things got out of control with his having been on the generic too long. at that point, putting the med back at maintenance dose would not necessarily have an immediate effect.
but i think i'd put a call in to his doc about this. he might want you to temporarily increase the med, without even removing the other one, at least until things get under control again, and then re-evaluate. or he might want to wait a little, but i think i'd ask.
after today seems clear his seeming 'off' was probably seizures - and a lot of them.
i hope things get better soon. Derrick seems like such a sweet person! i hate to think of him suffering so much. and all because the stupid insurance company wants to save a couple of bucks shuffling suppliers around.
~ waves ~