My Son Is On 300mg Of Clozapine Which Has Been

My son is on 300mg of clozapine which has been really good for him but recently had a servere seizure due to unexplained high levels. He has had to hand in his licence in for 6 months which is distressing him so he now wants to go back to Seroquel which he was non compliant with in past. He has been on clozapine for 6 years now, NO ADMISSIONS. His ECC has suggested a epilepic disorder at front lobe. Could clozapine be solely to blame (which mental health seems to think so) or could other matters come into play? Thank you