Re: 17 year old son now has Tourette's???
I have Tourette Syndrome and having been taking meds to help with my tics for 19 years and have NEVER heard of Topomax being used for Tourette's . . . only Epilepsy. I recommend taking him to see another neurologist or having the same neurologist change him to another medication. When he is on the right medication, it should help decrease (not increase) tics.
I have taken Klonopin, Risperdal, Clonodine, and Haldol for tics. Risperdal helped SLIGHTLY, but Haldol works so well for me that people don't even know I have Tourette's anymore. My tics are practically gone while I'm on Haldol. It's an "oldie but goodie" medication. I recommend Haldol, Risperdal, or Tenex. Those are the 3 main meds that are used to treat tics. The generics for those medications should work fine too. My insurance will only cover the generics of those medications.
P.S. Researchers say that Tourette's usually minimizes or goes away in adulthood, but mine did not. When I'm not medicated, my tics are worse now than when I was in puberty.