My son will turn 13 this week. He has been on various ADHD medications since he was 7 years old. He is healthy, never misses a day of school and is growing like a weed! He does not take the medication on weekends, school holidays and during the summer. This has been hard on us at times and when we seem to be having real difficulties, he will take medication during these times, but never for the entire summer. I am sure that your doctor will also suggest that your child have a medication vacation. This can be very traumatic, but it does give their body a chance to catch up. I find that the first few weeks of summer, I don't think I can make it, but either he adjusts or I do, because we have survived.
We started will Adderall, which worked fine. We also tried Strattera with terrible results. The summer before he began middle school, we had him retested and decided to try Focalin. He performed even better on the tests with Focalin than he did with Adderall. It was easier for him to swallow and did not leave a taste in his mouth and can be taken in lower doses. It has been great and has not had as many side effects. Every child is different and you will have to find the right medication for your son, through trial and error.
Our biggest problem was the loss of appetite. He will not eat lunch at school. So be prepared for a loss of weight especially the first year. I began sending him a variety of healthy snacks that he likes, like yogurt, granola bars, cheese sticks, grapes, etc. I explained to him that his medicine was telling him he was not hungry, but his body needs fuel. I encourage him to try to eat at least two of the choices in his lunch box, but he did not have to eat every thing. He has gotten used to the medicine and is more able to eat during the day, but still does not eat much lunch. He eats a good breakfast and a good dinner. He usually gains a little weight in the summer and then slims down during the school year. But this was his normal growth pattern, even before medication - he would beef up, then shoot up.
He is showing a great deal of maturity this past year and we are having less behavioral problems than when he was younger. He still struggles to keep on track at school, but the medicine has been a life saver. Our doctor warned us that as they get older they can rebel against the medicine. So, at least once a year since 4th grade (usually towards the end of the year, when there is not much going on) I have given him the option to not take medicine. He tries it for a few days and then realizes that he needs the medicine. This has really helped to not make it a battle to take it. He takes medicine every day for school, but I give him the choice on the weekend depending on how much homework he has. He usually decides to take it if he has a large assignment.
It was very difficult for us to make the decision to put our child on medication. My husband was VERY against it. But our doctor explained that the side effects of medicine are not as harmful as low self esteem, poor school performance, trouble with classmates, drug abuse, alcohol abuse and suicide - which are all common among kids that are not treated for their ADHD. Just think - would you deny your child insulin if he was a diabetic or asthma medication, allergy medicine? Unfortunately, our society is not as accepting of "brain disorders" as they are of "body disorders."
Good luck and I hope that you will find what is best for your son.