@cashelton
I've had a seizure disorder for 57 years and the limited information you provided, especially about Keppra doesn't sound consistent with Epilepsy, seizures, or Keppra use to me. Hopefully some Keppra users will contribute some of their experiences.
Drowsiness, mood disorders including aggression and muscle weakness are side effects of Keppra. Thirst is another side effect. Is your ex vocal and able to convey his needs and concerns regarding hunger, thirst, pain or other needs? Perhaps the Keppra caused him to be dizzy, another potential side effect, and the wheelchair is for his safety but it shouldn't cause him to not be aware. I'd be squawking too. His dose isn't that high but it depends on other conditions, medications and how sensitive he is to medications?
Was he given any of the usual tests for seizures like medical history, neurological exam, EEG, MRI/CT, cardiac or blood tests?
Vitamin B-1 may help improve his aggression. Do you know if he was found seizing, unconscious, postictal (confused) or asleep?
I hope you will keep us informed as to his condition/diagnosis.
Take care,
Jake