[Plasma levels of phenobarbital in epileptic children. Effect of combination with other anticonvulsants].

The effect of age on the steady state levels of phenobarbitone, alone and when given with phenytoin, sodium valproate and ethosuccimide has been measured in 1 361 children whose ages ranged from one month to 12 years. The relationship between dose and plasma level differed in those under 2 years from those aged between 2 years and 12 years. The addition of the other drugs altered the pharmacokinetics of phenobarbitone.