Singulair Side Effects: I am 49 yrs old and was prescribed Singulair for allergy and asth http://www.medications.com/effect/view/39595 I am 49 yrs old and was prescribed Singulair for allergy and asthma symptoms. I began taking it 2 weeks ago. I find it extremely effective for both asthma and allergy symptoms. Last week I experienced nausea - this has stopped, so it may or may not have bee The FDA is still investigating Singulair for a link to neuropsych Thu, 05 Mar 2009 00:35:36 -0500 http://www.medications.com/effect/view/39595?item=17694 The FDA is still investigating Singulair for a link to neuropsychiatric events. Please report your adverse reaction soon. This is the link: https://www.accessdata.fda.gov/scripts/medwatch/medwatch-online.htm. Thank you! Parents United for Pharmaceutical S http://www.medications.com/effect/view/39595?item=17694