I seem to be experiencing a side effect not listed; nightmares! I've always had vivid dreams but since I started Zyrtec things have gotten freaky. Published: September 23, 2007 ::

Suffer sinusitis. Drug works great! Published: October 09, 2007 ::

I've been taking Zyrtec for Chronic Sinusitis for 1year.In my most severe cases of sinus inflamation,it only took 15 minutes to relieve my symptoms.I am most grateful for Zyrtec-D. Published: January 12, 2009 ::

I have to use Zyrtec-D on a daily basis due to chronic allergy conditions. Let me just say I am so mad that it is OTC because now I have to pay $25 for 24 pills when I was paying $20 for 60 pills. Something about that just does not add up. Honestly, I do not take this medicine as needed or temporarily, I take it because I HAVE to. I love Zyrtec-D since I have had allergy issues my entire life. THIS is the one that works! I pay a lot of money for health insurance every month, and when medicine after medicine gets placed OTC it makes people wonder why even have health insurance. I mean really, what IS the point? Someone help me understand... Published: April 02, 2008 ::

This medication is terrible for me! Sure, it dried up my sinus drainage, but has kept me up all night..shaking and unable to sleep. YUCK! Published: November 02, 2007 ::

Before I began taking Zyrtec-D I had a stuffy nose, post-nasal drip, and horrible sinus cavity and eustachian tube congestion. After taking Zyrtec-D all my allergies went away so I'd say the medicine worked like a champ. Unfortunately Zyrtec-D also worked like a champ at preventing me from sleeping for an entire year. It got so bad I was only getting 2 or 3 hours of sleep a night and some nights I wouldn't sleep at all so I had to quit. My allergies are back but I couldn't live without sleep. Published: September 04, 2008 ::

Using this medication has changed my quality of life. I suffer from severe headaches almost daily from congestion. Taking 1 to 2 tablets a day keeps my head clear and my pain gone. Published: March 22, 2009 ::

Just tried the Zyrtec-D, after using Zyrtec for 10 years. This product definitely worked to manage my allergy symptoms and chronic cough better than plain Zyrtec, but definitely with a side effect-- difficulty sleeping at night- just a few hours a night, unless I use sleeping aid. Drawback definitely outweigh benefit- I can function ok with some congestion--not so without sleep. Going back to plain Zyrtec, which works great for my allergies-- can add daytime decongestent as needed. Published: January 05, 2009 ::

I absolutely love Zyrtec D! I was hooked to nasal spray due to severe nasal allergies having me stopped up and congested all the time. I just wish it wasn't over the counter now as my insurance covered most of the cost before but now I have to pay in full out of pocket and it's not cheap! I've never had a bad reaction to the medication and I've been on it for 2 yrs now! It works for ALL seasons of allergies! :) Published: August 22, 2008 ::

I have been taking zyrtec-d for about a week for my allergies. It seems to have helped with my nasal allergies but now i have a nagging cough and itching throat. Published: April 24, 2008 ::

I loved Zyrtec and am also sorry that it is now over the counter. I have switched to "Xyzal", but took Zyrtec for a couple of years. Would rather take it at this point as I have side effects with the new drug Published: April 04, 2008 ::