My father, a 68 yr old very healthy man had a grand mal seizure in November while at work for no apparent reason. He was extremely combative during the seizure and was heavily sedated by paramedics. MRI, CT, EEG, blood work all normal. He then had a second seizure in January during his sleep. Again, normal diagnostics. He is now on Dilantin 400 mg daily. Between episodes, he experienced nausea that "traveled" up to his head and hallucinations, occasionally made lip smacking sounds and jerking head movements. He has no recollection of any of this. He does not want to be on medication for the rest of his life, especially because no cause has been determined. The nausea is now gone as well as the hallucinations. Why could this be happening? He has never taken any medicine and has never been hospitalized.