Clot in the brain, (Fits) For his case?

My Father met with an accident 28 years ago and went into coma for 2-3 months. After that, he recovered slowly from memory loss and became normal again. At that time, he took Eptoin (Phenytoin) tablets for 3 years as advised by a neurologist. Even after the 3 years, everything was fine. But 18 years after the accident, he started having convulsions(not sure about the term). CT scan reports showed a blood clot at that time and EEG report showed Left Fronto Temporal Dysfunction. From then, according to a neurologist's advise, he had been taking medication like carbamazepine (CR)(600mg), Levetiracetam (500mg) and Phenytoin tablets. Even though he is taking proper medication, he is still having convulsions. So, Is the medication good enough for his situation? and is there any better treatment that would help him? or any other neurologist to contact for his case? Please help... Thanks