http://www.medications.com/effect/view/41598 I've been on Singulair for a few weeks now and just put 2 and 2 together. Since starting this medication my nighttime asthma has improved but I have been very irritable. I have always been a stay at home mom and wouldn't have it any other way but lately I Fri, 22 May 2009 10:58:54 -0400 http://www.medications.com/effect/view/41598?item=20022 I hope you and your children are feeling better. Please report your adverse reactions to the FDA as they are continuing their safety review of Singulair and every report will make a difference in the outcome. You can find a link to the FDA's reporting s http://www.medications.com/effect/view/41598?item=20022