I would have to ask how long had they been on the medication. I would also ask if he had shown any signs of any "parkinson like symptoms" before this episode. Seizures are usually a secondary problem related to Haldol use , if they have a seizure they more than likely have some kind of underlying organic brain dysfunction of some kind. I would also like to know if they were on any other kind of psychotropic drugs. Just a few things running through my pea brain.