A 3 yrs old boy having high grade fever for one day, had two episodes of brief convulsion at 6 hr interval. He had up rolling of eyes with clinching of fist which lasted for few minutes, not associated with loss of consciousness. The child remained asymptomatic except fever between these two episodes. He had similar episodes of fever with convulsion one year back.

On examination no CNS finding. Plantar withdrawl. CBC WNL, malaria negative. What should be done next?