http://www.medications.com/effect/view/41460 Tremendous weight gain almost instantly from age 7 to now at age 8-1/2 . When my grandson started this medication we noticed the weight gain. The doctor assured us it had nothing to do with the Singular. We looked on line for information, but could find Fri, 15 May 2009 11:45:51 -0400 http://www.medications.com/effect/view/41460?item=19853 Please visit us for more information on Singulair's side effects and the FDA Safety Review: www.parentsforsafety.org Please report your grandson's adverse reaction to the FDA: https://www.accessdata.fda.gov/scripts/medwatch/medwatch-online.htm. I hop http://www.medications.com/effect/view/41460?item=19853 Mon, 07 Sep 2009 19:59:46 -0400 http://www.medications.com/effect/view/41460?item=22806 I've had the same issue with my son now 14. He began Singulair at age 9 and the weight gain seem to be increasing in the mid section and back. He's an athlete, very active and eats a healthy diet. His physicians insist there's no correlation but I whole http://www.medications.com/effect/view/41460?item=22806