My 2 year old son has only been on Singulair asthma for 4 days(si...

My 2 year old son has only been on Singulair asthma for 4 days(since Friday March 28th), but he will not be taking it anymore. We have noticed a HUGE change in him in those 4 days. He is having mood swings like you wouldn't believe. One minute he's ok, then the smallest thing will trigger a terrible tantrum, then he has his clinging moments like he's seeking security where he just clings to me. This is totally not normal for him. My parents also noticed a changed over the weekend. He is normally the perfect angel for them, yet threw tantrum after tantrum while they had him. I'm so glad that I thought about his actions being a side effect of the meds and found this website. I'm horrified at all of the circumstances I've read about on here and I hope that all these children who have been on it for years have no long term side effects from the meds. I am currently awaiting a call from the doctor to find out what medicine they recommend to replace it with.