http://www.medications.com/effect/view/28992 Update: My daughter has been off Singulair for 3 months and is doing so much better. She is not having anymore nightmares, heart racing, anxiety attacks. No more itching, headaches, stomach pains, depression. She is so much happier now. She is 7 years o Sat, 31 May 2008 12:53:41 -0400 http://www.medications.com/effect/view/28992?item=8779 My son has all the same symptoms and in addition ulcers in his duodenum and esophagus. Did you have to wean her off the singulair? http://www.medications.com/effect/view/28992?item=8779