Eptoin is a medicine given for epileptic patients. If you have had a phase of epileptic attack after accident thaen it is not advisable to stop it till the full course is completed. But if the same has been prescribed for significant irritability, anger or other uncontrollable emotional upheavals after the accident then relaxation methods, emotion focused therapy, controlled breathing techniques etc can help. But its not advisable to stop the medicines abruptly. If you want to stop the medicines meet a clinical psychologist
in your vicinity learn the methods properly and the you can gradually reduce the medicines.