My son has been using it since Sept 2010 for both motor & vocal tics. We have been successful with it, but with a drastic change in diet as well. No MSG or corn syrup in his food. I just ordered some today, except they are currently backordered.
He's had his tic since he was 10 & now he is 13. Only last year did we try this product, & wished we knew about it sooner.