Both my daughter and I have taken Singulair. We kept my daug...

Both my daughter and I have taken Singulair. We kept my daughter on Singulair for about six months. Like many others have noted, she became violent, agressive, sassy, etc. (She was 5 at the time) After consulting a pulmanary doctor, she was taken off the Singulair and put on Advair, Orapred (for a short term) and Albuterol. The behavioral symptoms stopped almost immediately. As a side note, the brand name Orapred does not cause over-excitedness as does the generic version and Xopenex is a newer form of Albuterol that does not cause the weight gain, hperness and sleeplessness. Her asthma is well under control at this time. Trial and error is the best with all medicines, they have so many different drugs out there. My personal experience with Singulair is mixed. Sometimes I take it with no or little side effects, and other times I have bad enough side effects that I stop taking it. Any medication can cause bad side effects, you just have to weigh the pros and cons.