I have a 16 year old son. This morning in his sleep, he had a seizure that lasted over 5 minutes. He bit down on his tongue really hard. I called 911 and when they got here, he was unconscious and unresponsive to general stimuli. A CAT scan was done and lab, nothing came back. He has been put on 100mg Dilantin 3 caps @ hs. I m very concerned, because they don t know where this is coming from. About a year ago, he woke up and told me that his mouth hurt really bad and that he had bitten his tongue in his sleep, which leads me to the assumption that he had a seizure. Can you please give me some advie.