My son is 15 yrs. old and has Tourettes and ADHD. Could any one tell me if this med. would cause his tic's to become worse? He has very low self esteem and cannot focuse at school, He was on Zoloft but became even more aggressive, aggitated, and suicidal thoughts. I'm affraid of his tic's becoming worst. But want to see my happy go lucky son back again.