Yea it's normal. It's called the "post ictal" phase actually. Once the seizure is over, he's more than likely out of harms way, so it wouldn't be anything to rush to the ER for. However, if he has seizures often and isn't being treated for them, that could be a cause for concern. Seizure activity that lasts too long can cause brain damage.. also, if he driving, in the shower, etc. and starts seizing, that's obviously dangerous. But ya, the acting disoriented, nauseous, sweaty afterward...that's all normal.