Hello dear
I understand your concern
Treatment of seizure requires when it occur.
If you have not seizure after 
concussion then at present no treatment is require.
Treatment should be taken after complete evaluation by 
neurologist.
Generally for prevention 
phenytoin is used.
Take following advice when you have seizure attack:
First requirement is first aid therapy.
Give proper position that prevent the regurgitation of fluid, apply mouth gag, 
tongue depressor, nasogastric tube, keep airway patent.
Give midazolam and lorazepam rectally or orally to stop the attack.
Keep the epilepsy diary. Avoid the triggering factors like noise, light, smells, aggression, food.
Give diet that rich in fat and adequate in proteins 
Drugs:
Depends on type of seizure.
Phenytoin, carbamezapine and valproate most commonly used drugs
First give one drug then if do not response give combination of two drugs.
Alternative therapy like 
acupuncture, relaxation exercise like yoga and walking, psychological intervention can be helpful.
Hope this may help you
Best regards
Dr. Sagar