Update: My daughter has been off Singulair for 3 months and is doing so much better. She is not having anymore nightmares, heart racing, anxiety attacks. No more itching, headaches, stomach pains, depression. She is so much happier now. She is 7 years old and acting like a happy child now. I am so glad that I took her off it in December. She is not crying and upset like she used to be. We could tell that she improved within one week and is still improving. Hope everyone else improves like my daughter has.