Hello Sunni,
It's unfortunate that kids in elementary and junior high can be so cruel. I have a neice going through similar problems. The best thing to do is to consult your doctor. While online resources are great for getting information that will help you ask all the right questions, they can not take the place of your doctor's sound medical advice.
Until then,Here you can read an article that gives you the basics of ADHD medications. Here is a link to ADHD and how it affects the child and what can be expected.
This link will tell you about treatments available.
Good luck. Please stay in touch and let us know how you and your son are doing!Vicki M