BEHAVIOR PROBLEMS CAUSED BY SINGULAIR. Our 7-year old daught...

BEHAVIOR PROBLEMS CAUSED BY SINGULAIR. Our 7-year old daughter has been taking Zyrtec, as needed, for her allergies since the spring of 2005 without side effects. That summer, our allergist recommended she add Singulair. She took it for a short while w/o noticible side effects that we can remember. This spring our doctor prescribed it for her again, along with Zyrtec. We gave her the medicine regularly, not expecting side effects as she has done well with other medicines. Normally, our daugher is a very happy child. Friends often comment on her ready smile and good disposition. This spring, however, she exhibited uncontrollable anger spells about very small things. She would become upset about something small, and then her anger would build, causing a temper tantrum which lasted hours. As parents, we were very concerned and disturbed by her behavior. We were about to seek professional counseling because we tried many different ways to help her without success. Around this time (late spring), a friend told me about a child she knew who experienced behavior problems while taking Singulair. My husband did a quick Internet search, finding many other similar personal testimonies. As a test, we immediately took her off the medicine, especially because we weren't convinced that it helped with her allergies anyway. After a few weeks passed, our daughter's behavior changed dramatically. She has not had one temper tantrum in three months! My husband and I felt like we got our happy, little girl back! We are absolutley convinced that Singulair caused her behavior problems. If your child or you are taking Singulair and feeling/behaving abnormal, please consider finding an alternative medication. I am sure Singulair doesn't affect all people in this way, but Merck needs to recognize this side effect! Today, I tried to inform them by email about our problems, but their website referred me to my physician (who already knows). Why don't they want direct feedback from their consumers???