We tried Strattera with both of my boys before going to a different med.
With child 1 (highly inattentive, highly hyperactive), it just didn't work for us. We went with a stimulant medication (Vyvanse), and also added a non-stimulant to help with the time he wasn't on it (Intuniv). Intuniv works 24 hours, but it's not a stimulant....NOTHING out there works for hyperactive ADD kids like stimulants do. BUT, it does certainly make a huge difference in the morning and in the evening when he's not on the Vyvanse.
With child 2 (ADD, inattantive type, not overtly hyperactive): We stayed with Strattera longer...but found that my normally happy, funny, bouncy child, was actually becoming DEPRESSED on this medication. He actually had crying bouts for no particular reason! So we also switched him to Intuniv. It has been WONDERFUL for him and we're very happy with it.
My point is, you might have to try a few things out, in a few different combinations, to see how they work. With child 1, we switched him from Vyvanse to Adderall XR for a while, just to see if it would work well for him (because, honestly, the copays were much cheaper). But it didn't, and he noticed a difference in school. So communicate with him and ask how he's feeling. Keep an honest, running dialogue going with him, his teachers, and his doctors. If something's not working out, see what you can do to fix it without breaking something else.
Best!
C. Lee
ETA: The only side effect we've noticed with Intuniv: It made child 2 sleepy. He was tired during the day. So we started giving it to him at dinnertime. Problem solved...AND he gets a great night of sleep. :-)