http://www.medications.com/effect/view/36318 My son was on a cocktail of Singulair, Zyrtec, Astellin and Nasonex. Like a miracle, his severe allergies cleared up almost immediately. Months later, behavioral changes started to surface. Extreme irritability, major meltdowns over nothing, problems in Thu, 06 Nov 2008 15:41:07 -0500 http://www.medications.com/effect/view/36318?item=14238 You're not crazy. I was on Zyrtec for 10 years and was treated for depression, had ugly emotional outbursts, constant fights with family and then started to have memory problems. I thought I was having early signs of Alzheimers (I was 40). I went to a n http://www.medications.com/effect/view/36318?item=14238 Wed, 26 Nov 2008 06:53:27 -0500 http://www.medications.com/effect/view/36318?item=14846 Hi. My 7 yr old son has had the same symptoms on Zyrtec and Singulair. He is on Zyrtec now because I also though his problems were due to the Singulair. He has started having vocal tics like he has Tourette's Syndrome. This is very upsetting and I am afrai http://www.medications.com/effect/view/36318?item=14846 Mon, 27 Apr 2009 09:54:51 -0400 http://www.medications.com/effect/view/36318?item=19228 my son & husband have severe environmental allergies and try to avoid the drugs as well. The most effective safe method we found was to do the saline nasal rinse 2X daily and remove allergens from the home. No carpet, dust mite covers, leather furniture, e http://www.medications.com/effect/view/36318?item=19228 Tue, 05 May 2009 22:48:42 -0400 http://www.medications.com/effect/view/36318?item=19551 have you found any way to deal with the allergies with any meds that have fewer side effects? please let me know -- I have a 10 year old son with asthma, allergies. his mood has improved now that we have stopped singulair -- I'd like to stop zyrtec, also http://www.medications.com/effect/view/36318?item=19551