http://www.medications.com/effect/view/37728 My 9 year old son started Singulair 5mg about 8 months ago. Shortly after, he started to occasionally complain of stomach pain and not being hungry. About 2 months ago, they changed the dosage to 10mg. He now has chronic diarrhea and severe weight loss. Mon, 05 Jan 2009 15:21:57 -0500 http://www.medications.com/effect/view/37728?item=15732 EOSINOPHILIA is an increased number of eosinophils - a type of white blood cell - which usually occurs in small numbers in the blood and intestine. When they appear in high quantities in other parts of the body they can cause inflammation. For example, i http://www.medications.com/effect/view/37728?item=15732 Mon, 05 Jan 2009 15:24:12 -0500 http://www.medications.com/effect/view/37728?item=15733 I posted that as vasculitis is a known side effect of singulair,go to parentsforsafety.org for more info good luck http://www.medications.com/effect/view/37728?item=15733 Tue, 21 Apr 2009 10:07:42 -0400 http://www.medications.com/effect/view/37728?item=19057 I had the same experience with my 7 year old son. He would eat VERY small portions and ask to lay down because his tummy hurt. I took him off Singulair in December and he still complained about stomach pain in April. I took him in to see the doctor and http://www.medications.com/effect/view/37728?item=19057