Aucte intermittent porphyria and epilepsy.

A 14-year-old boy had suffered from intermittent acute hepatic porphyria, myoclonic convulsions and mental retardation (Lennox-Gastaut syndrome). The porphyria was treated by stopping the administration of phenobarbitone and phenytoin. Sodium valproate at a dose of 70 mg/kg per day lessened the severity and frequency of convulsive crises.