You should also study up on things you can do and try them if you do not want to start him on meds. IF he still is having problems when he gets back to school they could insist that he be medicated.
Read
The Crazymakers by Carol Simontachhi
and Brain Allergies by Dr Philpott
Cut him off ALL junk food and preservatives possible.
Give him omega fatty acid like this
OmegaBrite | OmegaBright: 100% natural, advanced Omega-3 formula
Also some people swear by this
Hyperactive Children - Homeopathic Remedy for Hyperactivity
If and when you give him a prescription medicine it would be given so he is always medicated.
If after awhile he seems like the meds aren't working you need to take him back to the dr for re evaluation
and they will up the dose or switch him to something else.