http://www.medications.com/effect/view/35328 I have been on Zyrtec for three years (Every day) haven't noticed mood swings in myself? My mother also takes them every other day and is not particularly moody. Although she has trouble sleeping which she attributes to the menopause But if i don't take o Thu, 06 Nov 2008 15:51:28 -0500 http://www.medications.com/effect/view/35328?item=14239 Try to get off all the antihistimines while you are breastfeeding. No one will tell you that it will harm the baby but the medication stays in your body for up to 3 years. Your daughter could develop an immunity to the medicine and won't be able to take http://www.medications.com/effect/view/35328?item=14239 Tue, 02 Jun 2009 22:40:16 -0400 http://www.medications.com/effect/view/35328?item=20309 Honest to Gosh when I took Zertec for my hideous allergies, I got very, very cranky. To a point I was awful. I stopped taking it thinking it was a coincedence and I took it again a week later and it did the same exact thing! I now take Allegra with no p http://www.medications.com/effect/view/35328?item=20309