We have an other update. Day four being off Singulair. I have seen a big change, back to his normal self (thank God). Everyday that he is off, he gets better and better. Yesterday there wasn't even a rage fit. He is sleeping better and no more screams at the top of his lungs. The screaming was the first that stopped and every day the fits get less and less. I understand that a growing baby is going to throw a fit here and there but the fits he was having were not normal ones at all. The funny part here is that after I took him off of all meds except the astinel (sp?) he is better all around. No runny nose, no cough, no sneezing, NOTHING!!! Good luck with your little ones. All I can say is everyday that he is off this awful stuff he will return back to you a little at a time.