Hi Yolande,
I hope you found a resolution to this. It is such a tough call to make: you want to do what's right for your son, so that school doesn't become a minefield. But you also don't want to "lose" your son as he becomes a medicated zombie. I would be careful about Guarana as it is a stimulant, and perhaps not ideal in his situation. Have you tried it? Did it work?
Some members of our team have faced similar difficulties, and found a gentle, effective solution. You can read their stories here:
http://wecreatesuccess.n...ntration-difficulties/.
All the very best, I hope you have the support you need!