S.B.
Both of my boys are on Tenex - the "older" version of Intuniv. I tried to get Intuniv, but my insurance will not pay for it and it is VERY expensive :(
Tenex works pretty well, but one of my boys (ADHD) uses it in conjunction with a stimulant (Adderall XR). My other son is bi polar so he cannot take stimulants. Also, make sure that your doctor is aware of all other meds your child takes as it can interfere with other meds (Clonodine is the first one that comes to mind)
I am currently fighting with the insurance company to get them to pay for the Intuniv. If it works even better than the Tenex (which isn't TOO bad), I will be very happy. Seems to do a good job of helping with focus - especially when it comes to school work.
Good luck!
** Edited: I didn't notice any side effects from the Tenex (probably largely the same for Intuniv). Both boys eat fine, haven't lost weight, are alert, etc. For comparison they are each on 2 mg a day (same dosing for both Tenex and Intuniv I believe) now - started out at 1/2 mg or 1 mg per day (depending on the kid).