http://www.medications.com/effect/view/34393 My daughter was taking a deadly cocktail of Zyrtec, Advair, and Singulair. She was on these medications for three years. At the time we thought that it was fantastic that her severe asthma and allergies were finally under control. After about six months of Wed, 13 May 2009 09:06:32 -0400 http://www.medications.com/effect/view/34393?item=19786 My son has been on Singulair and Zyrtec for years as allergy shots became inconvenient. i have been told by a school counselor he was a very depressed kid. After reading all the side effects of Singulair and Zyrtec he is going back to allergy shots. Can' http://www.medications.com/effect/view/34393?item=19786 Thu, 21 May 2009 12:35:53 -0400 http://www.medications.com/effect/view/34393?item=19992 I am thankful that you have found this information out before it was too late. Good luck and I hope that he heals soon. http://www.medications.com/effect/view/34393?item=19992