About 32 years ago my daughter was diagnosed as hyperactive and the school and Drs demanded I put her on Ritalin.  I did for about 2 weeks and she turned into a zombie.  I told they they weren't drugging my kid to "shut her up" and took her off of it.  In researching I found a book called, The Feingold Diet for Hyperactives.  When she had been "cleaned up" about two weeks the teacher aske me what I WAS giving her.  I said it's not what I'm giving her, it's what I'm no longer letting her have.  Artificial colors and sweeteners.  He addressed a lot of things and it took me a long time to read all labels in the grocery store but she was a changed child.  I'm told theygrow out of it and she did.  

I've also been told that Grape seed oil has been used with good results for hyperactive children.  I think you will have to look it up for dosage but it's worth looking into anyway.