Patient kind symptoms and conditions

No side effects here - my 5 year old has been on Singulair since he was 2 1/2 and has showed no strange symptoms outside of those of a normal 5 year old boy. He has asthma and severe allergies - including a nut/peanut allergy. He also takes Zyrtec in the Spring and Summer seasons (heavy allergy time for him). Gets good grades in Kindergarten and has never had emotional/behavioral issues at school or at home. I am shocked to hear that people are having these extreme reactions! Although, it seems that there are always going to be reactions to ANY drug out there - go to any of the boards on any drug and you will find people with extreme reactions. Singulair has saved my sons lungs, and possibly his life.