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 .. now again the blood tests show that the depakene is reaching 850 .. the question is .. why is the depakene increasing in the blood ?? is there any other good medication with less side effects??