Background:There is considerable evidence which suggests that Omega 3 polyunsaturated fatty acids may have a potential use in the treatment of epilepsy.Aim:The study was to investigate the effect of Omega 3 polyunsaturated fatty acids (as fish oil supplementation) in reducing the frequency and severity of epileptic seizures in children with medically resistant epilepsy.Materials and Methods:In the case-control study, a total of 70 children with medically resistant epilepsy underwent assessment of the frequency and severity of the epileptic attacks at baseline, after one month, two months and three months from the beginning of the study; 35 children received fish oil and the other 35 children received placebo.Results:The number of children who received fish oil, having 0 epileptic attacks increased from 0%, before starting the study, up to 57.1% at the end of the third month, while the improvement was minimal in the placebo group, with a significant difference in the improvement between the intervention and the control groups. There was no statistically significant difference in improvement in the severity of the seizures either between cases and control or between the beginning and the end of the study.Conclusion:Omega 3 polyunsaturated fatty acids elevated the seizure threshold in epileptic patients and may help in achieving seizure control.