Not sure if this will be helpful to you but my son had some tics on and off, some OCD, he has an anxiety disorder. I read somewhere magnesium helps with tics and such so I started giving him Epsom salt baths (for the magnesium). Within a week of starting the baths, the tics stopped. Completely. I have him take an Epsom salt bath now at three times weekly (usually more like 4 or 5) (I even brought it with us on vacation). I put at least two full cups in his bath each time and I have him soak for no less than 15 minutes each time. Really worked for us. Tics have not come back at all.
