http://www.medications.com/effect/view/28577 I have a 12 year old son who has been on Singulair off and on since he was 10 years old. It wasn't until he started taking Singulair on a daily basis in 2007 that I saw a change in his personality. I thought it was due to him starting Junior High. He has Fri, 28 Mar 2008 15:18:13 -0400 http://www.medications.com/effect/view/28577?item=6044 Please respond to my reply. I can help your family. http://www.medications.com/effect/view/28577?item=6044 Wed, 02 Apr 2008 20:59:41 -0400 http://www.medications.com/effect/view/28577?item=6522 Have you seen a change in your child's disposition yet? We are stopping Singulair tonight! Thanks http://www.medications.com/effect/view/28577?item=6522