http://www.medications.com/effect/view/41531 I have been taking Singulair for one week now due to my exercise induced asthma and allergic asthmatic symptoms. I feel very stressed out and anxious and yell at my parents a lot. Also, I feel kind of paranoid, like I feel as if somebody is watching me at a Sun, 17 May 2009 11:48:12 -0400 http://www.medications.com/effect/view/41531?item=19891 Almost every symptom you mentioned is a documented side effect of Singulair. Your doctor and parents may not be aware of these side effects so PLEASE TELL YOUR PARENTS how you are feeling right away and show www.parentsforsafety.org, where they can get inf http://www.medications.com/effect/view/41531?item=19891