Hi, I have a 12-year-old son with ADHD as well. I also have ADHD and have been taking medication for over 10 years.
The change with medication is to find the right fit. Ideally, you find a clinician with good references and work through the process with them. It is important to make sure your son does not loos confidence in his ability, and medication can help with that. If they loos confidence it is much harder to get back on track.