Thank you for writing to us.
The development of his mind has got nothing to do with the medications that he was on for epilepsy
I would strongly recommend that he should start taking the medications for epilepsy again.
If he is already on the medications then he should have blood tests done to see whether the blood levels of the drugs that he is on are adequate or not.
If they are adequate and he is still having fits
then a change of medication is strongly advised.