PLEASE watch for behavioral side effects! They will not tell you this unless you push for it, but a (supposedly) small number of children may have behavioral side effects.
That's what happened to my 10-11 year old son. He went from being a really great student, always able to keep up and always getting good grades... always happy and very easy for everyone to deal with... to grades dropping, inability to concentrate, and anger... oh, the anger and frustration we were dealing with.
I just couldn't understand it, because he had NEVER been this way before. We tried so many different things, we talked to him so many times... and he would just cry and say he feels so angry and he doesn't know why.
Finally after talking with my aunt about it, she asked about his medications. I hadn't given it any thought, because the allergy nurses had already said there wouldn't be ANY side effects from the allergy meds. At this point I had already removed him from a couple allergy meds they had prescribed him that we felt were unnecessary (and we were right... he was fine with way less meds. They started him out with 5-6 meds the day his allergies were diagnosed!

), so we decided to try taking him off the Singulair and switch to Claritin (Zyrtec in the spring/summer), and see what happened. (At this point we had been getting allergy shots for about a year or so, too.)
Well, not only did his allergies respond well to the OTC meds, but all the behavioral issues just melted away. I am not kidding, it was like I got my sweet, happy boy back! And last year, he made merit roll the first 3 semesters and honor roll in the fourth semester.
The allergy office was against taking him off meds, so I didn't tell them until a couple months after the fact, when I knew what the results were. At this point, it was starting to show up on the news about the risk of suicidal behavior, so I felt they needed to hear about our experience with it. When I told them, then they admitted that this can happen to a small number of children, and that they were glad I took him off the Singulair (funny, they were against it until I told them how well he responded to me taking him off...)
I'm not saying every child will react to this medication the same way, I just want parents to know to watch out for it. I'm so glad my aunt finally helped me make the connection. We could still be dealing with those issues if not for her, but instead, my now 12 year old son is still just as calm and in control of himself as he has been all of his life (except while on that medication).
