My 15 month old son was just put on this Friday, four days ago. He had been on Zyrtec since he was five months old and his allergies had recently gotten worse along with a percistant cough. As the weekend went on he became more and more angry and fidgety. Sunday afternoon, after his nap he came running down the hall screaming and crying (this nap is usually 1 1/2 hours long and he had only been asleep for 30 to 45 minutes when this happened). He was very upset for about 20 minutes. He is normally a very happy, fun loving child. Later that afternoon he didn't get his way and took it out on me. He began to kick and scream(at the top of his lungs) , throwing his head back, and then hitting me. Everyone that was with us have been around him from day one and they all said how he wasn't himself and had never seen him act this way. Now, this morning on our drive into town to go to daycare he normally is talking the whole way (45 minutes) but this morning he was just staring off out the window and didn't want to talk or "have a conversation" with me. I knew something wasn't right and had already had it in my head he wasn't getting another dose of this. I found this site and some of the little things began to jump out at me and I know for sure we aren't going to take this again. I just hope and pray that this hasn't caused any lasting side effects, again he has only been on it for 4 days. After reading all of this I have called the daycare to check and the doctor, who hasn't called me back yet. Going to see his ENT tomorrow and we will be having a long conversation about it all. His ped. is the doctor who put him on it. She is trying to try everything before he is put on a nebulizer.
Another side effect named on the Singulair web site is ear infections. This med. should have never been given to my son who has already had one round of tubes because of ear infections. The tubes have already fallen out and within a week he had an ear infection.