lamotrigine (PO) 1-5mg/kg 12hourly for 4weeks
OR
levetiracetam (PO) 10mg/kg 12hourly for 4weeks
AND
folic acid (PO) 5mg 24hourly for 3-6months
If the patient was already on anti epileptics, keep the same but divided dose.
In cases of polytherapy, some drugs can be eliminated leaving a patient with a single drug therapy.
