http://www.medications.com/effect/view/29465 i am so happy to hear all of these stories of recovery. i discovered my son's singulair side effects in march 2007, after 3 years of use. i can tell you from our experience that the most significant recovery comes within 3 weeks. after the 3 weeks, the m Fri, 11 Apr 2008 21:16:26 -0400 http://www.medications.com/effect/view/29465?item=7047 It is great to hear that not all kids have such a rapid response. I have not posted my story yet on this site, but it so very similiar to yours. My daughter was on Singulair for approx 18 months and did have some mild behavior changes that we never would http://www.medications.com/effect/view/29465?item=7047