Hi
so sorry your son is being teased, and I do hope he lets you try to explain tics to the other students.

My son was diagnosed with tics due to genetic Tourette Syndrome at age 10 and is now 22 and doing just fine! We did try medications in the beginning but stopped due to adverse side effects, including that awful zombie reaction! He saw much success from a more natural treatment protocol that I have documented on our TS forum here http://neurotalk.psychcentral.com/thread1145.html

I would also like to recommend an excellent book by Sheila Rogers "Natural Treatments for Tics and Tourette's" http://www.latitudes.org/book.html

I do think your pediatrician is a bit hasty to just dismiss your concern about Lyme as I know of numerous cases of Lyme induced tics. If your child has a history of strep infections, you may also want to look into a condition knows as PANDAS http://www.pandasnetwork.org

hope that helps a bit