my baby 6 months old has subvolemic brain may be due to post birth meningitis his EEG abnormal and getting infantile spasms of 2 sec duration around 20-30 each with 6-8 hrs duration. All his milestone normal till date with 9.3 kg weight and head circumference normal he is twin with exact same performance with other child----he got first spasm at 2 month old and started with phenobarbitone and no spasms for next 3-1/2 months last week started these spasms again and started with sodium valporoate 100 mg twice a day last week but not very effective what should we do...