Sudden worsening of tics

My 9-year old son was diagnosed with TS two years ago. When he was initially diagnosed, clonidine did provide some relief from his tics.  However, in the last two months, his tics have become markedly worse.  (I know that it's not the typical waxing that we have seen over the previous two years.)  We know to expect them to worsen as he approaches adolescence, however the significance of it has us really concerned.  

We have increased his dosage of clonidine to the level recommended by his neurologist's nurse specialist.  I really don't see that the clonidine does anything for him now but make him sleepy.  There seems to be no difference in the severity of his tics after his medication wears off.

I thought that I had read about a new medication that has "taken the place of clonidine", but can't remember what it's called.  I know that it began with the letter "P".

Any information about either of the issues would be so appreciated!

Thanks:

Beth

[CCF-Neuro-M.D.-CS]

The medications Haldol and Pimozide can also be used. These are typically better at controlling the tics. However, any of the medications can have decreased effectiveness over time. When this occurs a short period without the medication or changing to a new medication typically works. Good luck.