http://www.medications.com/effect/view/28488 I have two children on singular as of September 07. When my 6 year old was an infant he was always congested, we changed his formula a couple of times until the doctor decided to do a blood test to check for allergies and the results came back as an allergy Fri, 28 Mar 2008 02:34:56 -0400 http://www.medications.com/effect/view/28488?item=5956 I am very happy to hear you have not had any side effects to this medication!!! I have two sons on this medication, and I have noticed several side effects. Good Luck!!! Janie http://www.medications.com/effect/view/28488?item=5956 Fri, 28 Mar 2008 10:43:53 -0400 http://www.medications.com/effect/view/28488?item=5994 I agree my 6 year old has been on singulair since he was 2 he has no issues he is easy going, happy and well rounded. Now here are the side-effects he may be having from the singulair . He does have a lot of nose bleeds and he also has swollen lymph node http://www.medications.com/effect/view/28488?item=5994