My son is 8 and has been on Singulair for 4+ years. When he was as young as 5 he said he should just throw himself off of our staircase and in first grade, age 7, he told a friend he wanted to kill himself with a knife or scissors. I have taken him to psychiatrists, psychologists, pediatricians and guidance counselors and none have linked it to Singulair. I spoke with our allergist and he said to take him off of it. He said their office was not notified when Merck changed the side effects last year. Obviously the fat cats at Merck are enjoying their big bucks with little regard for the people taking their drugs, look at the new evidence about Vytorin-it does not work yet they have made millions on it. They knew it did not work 2 years ago. I am so happy that I now know this drug is dangerous. We will stick with our Nasacort, Clarinex and allergy shots, which are helping tremendously. I am planning on getting off of Singulair for my asthma as well. It is not worth it. There are too many reliable drugs out there to waste my money on the suicide drug! I am on Asmanex and may add or change to symbicort. I am so sorry some have already committed suicide because of this drug.