My friend has an autistic 16 years old boy who has epilepsy ,Generalized Tonic-Clonic , he was using Depakene chrono for a long time + lemictal, he was ok with it till september 2007, the blood tests showed that the Depakene chrono was increasing in his blood, so the doctor suggested to stop it and replace it by
Keppra, then , he was having seizures one after the other .. so they added the depakene to his daily taken medications ,, he was ok for almost 4 weeks ..