My 7 year old daughter has been on Singulair since she was about ...

My 7 year old daughter has been on Singulair since she was about 2 yrs.old. She has always been very energetic child, but I did notice as soon as she got a little older she began to get very aggressive, angry and mean all of the time. She also has had trouble making and keeping friends because she is so hyper and emotional. I never even associated Singulair with her problems until recently, even though I was told a few months ago that Singulair could be the problem. So, back at the beginning of June, my husband and I kept forgetting to give our daughter her Singulair, and this went on for about 2 months (and her mood was improving immensly). Feeling bad that we kept forgetting her Singulair, (not realizing that that was the problem) we started her back on Singulair again just a about a week ago and in just a few days time she has been truly unbearable! She's been very mean, yelling, throwing things, totally unruly! So bad that I was going to have her completely tested for ADHD and whatever else! So as of today, I am taking her off of Singulair and I am contacting her doctor first thing in the morning! Good luck to all!