I will never be sure Singulair changed my daughter because she is a very complex little girl. I just know that when we made some changes that included taking her off Singulair she has done nothing but improve!
My daughter is adopted, she was in Foster Care, she is a very vulnerable little girl. She has been on singulair since the age of 2. We needed to add an anti psychotic to her list of med's some time last year, because she was threatening to kill herself at 8 years old. She often complained of having a bad man in her head that would tell her to do bad things. When we heard about singulair side effects it just felt too coincidental. We made a decision to take her off ALL meds. Since that time she has done nothing but improve she is happy and working hard, the bad man is gone and everyone who knows her says she is a different child. Again we changed many things in her life I don't think we will ever know if singulair is the true cause of her behavior but we aren't taking any chances.