Please consider EEG neurofeedback therapy. Read the research out there about its effectiveness. A tic disorder is a brainwave disorder, and brainwaves can be trained out of bad rhythms.

There are lists of skilled and well trained NFB practitioners on the ISNR website. You would need to get a full assessment first to determine exactly which is the problem brainwave (I'll tell you right now: it's the SMR or sensorimotor rhythms). The treatment is computer games that you have to play with that brainwave via electrodes.

My son is 13 and was diagnosed with Asperger syndrome and a severe tic disorder a few years ago. He is competely tic free now, happy, healthy, med-free, doing well in school, and has enough friends. He's still quirky and unusual, but he always will be.

Do at least consider this option. And don't be scared off by the cost. Talk to the practitioner to find out what your options are. Unfortunately, all neurofeedback is private right now because there is nobody to pay for the big gold-standard study that you need in order to get public recognition.