Discipline: Singulair

Anyone Experience Bad Side Effects with Singulair?

My almost four year old son started taking Singulair approx. one month ago. Last weekend he was so crabby and just not nice! I decided after reading some of the negative reviews of Singulair, to take him off of it and see what happens with his behavior. He is like a different person now. Sweet as can be (most of the time!) and is listening and responding well to discipline, versus throwing a huge temper fit. Was it the Singulair making him act out or not? Has anyone experienced this before? Now, I am afraid to give him the Singulair...