Singulair Side Effects: I've been diagnosed with anxiety and panic attacks since Nov. 15 http://www.medications.com/effect/view/28893 I've been diagnosed with anxiety and panic attacks since Nov. 15 2007 ended at the hospital emergency room, after using Xopenex been using Advair and Singulair due to my asthma once my Doctor increased my Advair from 250mg to 500mg twice a day on Sept. 5th Please read my post when you get time. You are not nuts or loosi Tue, 01 Apr 2008 04:46:42 -0400 http://www.medications.com/effect/view/28893?item=6374 Please read my post when you get time. You are not nuts or loosing it. You are on Singulair. I had almost the exact same symptoms along with 28 pages of postings from people on this site. I was thinking the same things. Do I have a tumor, what is my http://www.medications.com/effect/view/28893?item=6374