I have a 10 year old daughter who has been on Singulair for 3 yea...

I have a 10 year old daughter who has been on Singulair for 3 years for allergies. The medication worked great and has not had ANY problems with allergies at all. I don't know exactly when her behavior started to change. It was so gradual. She became irritable and easily upset but I thought it had to do with hormones. In January 08 she began complaining of stomach problems and the doctor thought maybe reflux. We tried medicine for that but it did not help for long. Then in March 08 it really it hard. She began to have leg cramps often, which I thought were growing pains and the mood swings were terrible. She began to have tantrums that were so bad they were like night terrors but she was awake. She would talk of dying and hurting something or breaking something. She would lye on the floor and pound away uncontrollably. She would cry help me help me why am I feeling like this. She states she doesn't know why she does this and does not feel normal. I was researching allergies this past weekend and came across the Singulair problems. I had no idea about them. I immediately stopped the medicine and today is the 3rd day without it. I have seen improvement already. I was really encouraged because of her unusually great mood. However, she had a crying episode tonight. I know it takes time to get out of the system. I am hoping within a few more days she will be free of this terrible medicine. Patients should definitely be warned of possible side effects. Not everyone may react in this terrible way but from reading so many forums there are a tremendous amount of people who do, children and adults.