A little unrelated to your post, but related to tics:
My 7 year old son started to have tics (eye and head jerks, nose twitch) and after much research, I happened upon giving magnesium to help reduce tics.
Anyway, other things I did along with a magnesium glycinate supplement and massaging magnesium (plus Epsom salt baths) is to up his intake of magnesium rich food and decreased amount of things that hinders the absorption of magnesium) ,
I felt so lost and stressed about my son's tics, Feel free to contact me if you want more information about what I did and my situation in general.
I've shared my story here on Latitudes.org