http://www.medications.com/effect/view/29491 My 13 year old son has been on Singulair for about 4 years. I considered it a wonder drug because he would always get sick from his asthma. For the past couple of years my son has been very inattentive. I blew it off as the preteen hormones. It wasn't u Fri, 11 Apr 2008 21:52:08 -0400 http://www.medications.com/effect/view/29491?item=7050 Please read all of my posts about adverse drug reactions that were reported from Europe and Canada. I even bothers to translate one of them from Italian to English even though my Italian without help is awful. Everything that you describe can be found in http://www.medications.com/effect/view/29491?item=7050