How To Prevent Seizures Recurrence?

what are the prevention for seizures not to recur?

A 16 old male boy travelling in train for 26 hrs and after reaching home he took bath and slept at 3AM in the early morning and he couldnot wake up till 9.30AM and his mother tried to make him wake up but he has not responded and immediately he was rushed to the near by hospital and at that movement his BP was recorded 90/50 and slowly he got concisinous and drip was put on him after 10 to 15 mins he spoke to his mother and father.Now how do you guess what happened him.Their is no back history earlier about this episode.But just sometimes he talks himself in night and sometimes awake all of sudden during night.what do you say about this and how one should proceed with the treatment?