In response to Concernedcitizen with regard to the additional medications prescribed, we never got that far, but we were close. My son, as I've mentioned on here before (sorry for the repetition, but I think it's important), was about to be diagnosed as bipolar, which would no doubt have led to a whole host of other drugs.
Also, I totally agree with concernedcitizen with regard to not necessarily blaming our doctors. We should expect them to listen to us and take our concerns seriously, though. My son's first pediatricians were dismissive and condescending. We switched doctors and when I handed the new doctors a printout of all the posts from this site (back in 2005), they looked skeptical, but guess what? They READ it. And, my son's primary pediatrician has since told me that he's taken several kids off Singulair based on our story and the posts he read. The research provided her by concernedcitizen is INVALUABLE. If enough doctors see this stuff they'll start to question it and at least look at some of these children differently. Rather than throwing a prescription for Ritalin at them or stuffing them full of wellbutrin/abilify/lithium/klonopin/cymbalta/[insert your own here] they might think, "Hey, this kid's on Singulair...maybe we should try taking him/her off for a while to see what happens."
Finally, I wanted to put it out there that while kids may show mild side effects in the beginning (so mild that they can be dismissed in one way or another) I, personally, believe that with this drug side effects intensify over a period of time. My son, for example, was highly functional on singulair in the beginning and it completely eradicated his asthma and allergy symptoms, so it was great. Over time the side effects were more numerous and increasingly intense. Finally it got to the point where we couldn't dismiss it as bad behavior anymore, it was just completely outrageous behavior and my instinct told me it HAD to be the singulair. So these case studies that look at kids over a 24 week period are useless. In 24 weeks my son was fine. 52 weeks? Totally different child.
Definitely use the info provided on here, it will help not only your child, but other children as well.