Hi, sorry I am just getting to this. My son is now 12, My son got to the point about the time I wrote that (the 27th) that he was having constant abdominal tics. I counted how many seconds past in between and it was not even 2 seconds of relief. This may sound crazy but I was praying over him .... like down on my knees, please God help me understand this and in my head I heard--Its the sertraline. I began to cry. When my son finally dozed off to sleep I ran to the computer and researched if there were any cases of Zoloft or Sertraline leading to tics. I FOUND SEVERAL ARTICLES on, The next day I began to taper off his zoloft. I cut it by 25 mg. for two weeks then went down to 50 about three days ago. For the past two days he has not had a tic. I am praying that this was the solution. IS your child on an ssri? Apparently they do cause tic disorders! I don't want to get my hopes up but still, to see him without any issue for two days is such a relief. How is your son doing?