He may get used to it in time but here is something to know. He should get his blood tested and his Depakote levels should be from 50 to 100, more than that and it's too much.Blood tests! That sounds like too much for a child. I was dehydrated and sick on sodium valproate (Depakote) at 1200 mg. I lowered it myself to 750 milligrams and felt better.