I am devastated!! Everything that I am reading about your children is describing my son. He has been on Singulair since "06 and was hospitalized for 10 days in '07 for suicide thoughts and possible attempt. Before '07 and singulair he was happy,popular and class favorite. He was very charming and played well with others. After '07 and the singulair, he became very angry and defensive towards everyone. He isolated himself and had a bad attitude. We longed to just see a smile and guess what? We saw one last night! He has not been on Singulair since friday night. 3-28-08. I can see a difference in him now. Thank God for all of you sharing your experiences and lets all pray that they will not have longterm problems from all of this. God Bless you! Reecesmom