ZYRTEC Reviews

Average Rating: 2.0 (1790 Ratings)

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 Type: Over-the-counter Drug

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Key to Ratings: 1=LOW (I would not recommend taking this medicine.)
5=HIGH (this medicine cured me or helped me a great deal.)

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 1  allergies I've been taking zyrtec for seasonal allergies for 3 weeks and then stored taking them. During those 3 weeks I felt terribly depressed, I didn't want to do anything. I thought it was the allergies making me feel bad. I stopped taking it for a few months abd I felt extraordinary. Then the other day my allergies stated acting up a little so I started taking it... I sin began to have anxiety attacks for the smallest of things. M 17 3 weeks
 4  seasonal runny nose & sneezing slept longer than usual which was fine because I needed it. But it seems to cause or aggravate constipation. I only use it occasionally for 1 or 2 days at a time because I get too lethargic if I use it longer. M 70 1 days
10mg 1X D
 3  Cat allergies Drowsiness, weight gain, dizziness, shortness of breath, anger, mood swings, water retention, bloated and gas Works great for allergies. It stops my itchiness, no heart palpitations or dry nose/mouth but the side effects aren't wonderful. Gained 7 lbs in 1.5 month, water retention, stomach pains, bloating and gas. Go homeopathic if you can. It doesn't "work" as well but there are no side effects!!!! F 39 1.5 months
10mg 1X D
 1  Hay Fever My 3 1/2 year old who is normally full of energy and loves to joke and laugh has been taking this for the last 2 weeks because of hay fever symptoms. Since taking it his energy levels have decreased and he has started having tantrums. He is clingy and very emotional. He has been totally out of character since he has been taking the medicine. Alot of people have told me it is probably his age but I know (call it mothers intuition) that something else is causing this. Finally it clicked one night that it all started at the same time as he started taking Zyrtec. After researching it on the internet I'm finding about 9 out 10 people are having or have had this experience. I'm stopping this medicaton immediately and looking forward to my little man being himself again!! M 3 14 days
2.5Mil 1X D
 2  Hay fever & sinus symptons Heart palpitations, fatigue, achy joints, unsettled sleep, headache I thought I had sinus and hay fever, Zytec made me feel like I had the flu. the heart palpitations made me feel absolute crap, all I wanted to do was sleep, just not practical with 3 small kids! F 39 3 days
10 1X D
 1  Allergies I've rated Zyrtec previously mentioning vivid very strange dreams and nightmares. After having taken it on a few more occasions I've noticed that I feel terrible after taking it. (Note that I've only taken half-pills because the full pill makes me too sleepy.) After taking it always I feel like I am not being myself, have delusions, feel angry and "high" and like a zombie at the same time. In addition, I feel very sleepy, unable to concentrate and to make decisions, and also experience strong free-floating anxiety. This leads me to conclude that this drug influences the brain in some way. It would be reasonable to have this drug off the market to fully test it's side effects. It seems other site visitors have similar experience with this drug, and it needs to be further investigated. If you are considering taking this drug, stay away! M 28 1 days
Half doze 1X D
 1  allergies When my son was very young he took Zyrtec for his allergies. During this time, the smallest thing would make him get extremely upset and angry. He would throw a fit for a couple hours and nothing we could do would settle him. He had no pain tollerance as well. Our older child had to have perfect behavior with him because anything could set him off. It got so bad I thought I was going to have to take him to a therapist. He had been such an easy going child before this. Fortunately he was a very articulate child and during these episodes he would be crying saying he couldn't control how he felt and didn't know why he was so angry. I read a blog that others had written about the same reaction, unable to control anger and no pain tolerance. I immediately took him off the Zyrtec and he returned immediately back to his sweet easy going self. He has been off it for about 7 years now and is the sweetest child you could ever meet. DO NOT PUT YOUR CHILD ON ZYRTEC!!!! M 5 2 years
1X D
 1  Interstitial Cystitis Night terrors are the worst - disturbing surreal nightmares and the inability to wake myself properly from these, resulting in freaky hallucinations whilst being semi-conscious. I started with milder nightmares and these have built up to full blown terrors. Hearing things, I.e. the doorbell ringing when it isn't. Inability to get my words out and pronouncing them wrong. Random feelings of depression. Tiredness and inability to wake up properly. Forgetting things and struggling to stay focused. So lucky that my boyfriend suggested that it could be because of the tablets, god knows what would've happened if I'd've kept taking them! Horrendous. Terrified of sleeping now due to nightmares. Stopping this drug right now!! F 21 1 months
 4  intense sneezing from allergies No discernible side effects. Maybe sleepiness but not that overt. I'm hoping it's the cure for sneezing attacks so violent and long lasting that they damage my vocal chords and respiratory system due to blunt trauma. M 58
10 mg 1X D
 2  Allergies/asthma HORRIBLE. I've tried this drug three times now and each time things are a little worse and I'm only taking a half dose! Horrible drowsiness, anxiety, shortness of breath feelings. Despite taking it at night, I was such a zombie the next day that I could barely function. Never taking it again. The only reason I gave this two stars over one is because it actually did dry out my sinuses and mucus. Too bad being on it is sheer hell. This drug should be banned. F 31 1 days
5mg 1X D
 1  seasonal allergies completely exhausted zero motivation ignoring family and children HORRIBLE HORRIBLE HORRIBLE THIS DRUG SHOULD BE ILLEGAL I HAVENT BEEN MYSELF SINCE TAKING THIS DRUG AND AM ON DAY 3 OFF ZYRTEC AND FEEL LIKE CRAP F 33 2 months
1X D
 1  allergies Racing heart, anxiety, sleepless nights, irritable and feel like I'm on a bad upper. Not a good medication; I'm hesitant to take medications unless there is a true medical need. My allergies (red eyes specifically) have been going on for years; finally broke down and tried something (doctors advice). This drug felt like poision in my body. F 35 5 days
10 MG 1X D
 1  Severe allergies, hives I moved to an area where I suddenly developed terrible seasonal allergies to trees, weeds, grass, and mold. It felt like I had a cold all the time with stuffy nose, itchy eyes and eyes, runny nose attacks, and hives. Then it became a food allergy where I had an itchy throat after eating fresh cantelope and carrots. So I started taking one zyrtec d in the morning and one zyrtec at night. And it was amazing how well it worked. All of the symptoms went away and I felt normal. But over the years my body has changed and I am finally realizing that this is all from the zyrtec. I developed dermatitis that no dermatologist could explain. As a woman this was devastating because my skin was rough, dry, and itchy. So I figured I was reacting to make up with my allergies. Then I developed acid reflux, and my joints ache and pop. I only pee 3 times a day and I just feel sluggish and have a hard time sleeping. So I even did a sleep study and got a cpap machine that didn't work! So i slowly ran out of pills and was in the midst of moving and didn't have time to get more. I decided to try not taking them and I've noticed a HUGE difference. My skin is normalizing, I'm peeing 7-8 a day, my joints feel better. I am getting out of the itchy phase but it wasn't terrible since I was itchy when I was on zyrtec. And I have had crazy vivid nightmares and trouble sleeping. Hopefully it goes away soon. On a side note, I even took doxycyclene to help with my skin and during a beach trip it damaged my na F 38 9 years
 1  Terrible side effects over excitement, rage, violent behavior , mood swings, Anxiety, separation anxiety. Racing heart, stomach ache, crying for no reason. After being on Zyrtec we noticed a change in behavior, our 5 yr old became aggressive hitting and screaming crying over little things, It was thought at first he was just acting out. The next day after each out burst he was back to his normal docile self. After taking the drug he again became extremely agitated and violent. Stated didn't care if he lived or not. His behavior was extremely disturbing to us . I have experience in dealing with adults with mental health issues and have never encountered an adult with this much anger and rage. Taking him off this drug Today after reading more post we aren't alone in this belief that Zyrtec is the problem. M 5 6 months
5 ml prn 1X D
 1  Allergies I was taking the All Day Allergy relief from the $ store and it helped with itching, however I was having suicidal thoughts and since reading all these comments I come to realize its the Zyrtec! I even went to a therapist! Then I went on Claritin D and the D is for DEPRESSION!...I am so glad I found this website through WEB MD... I was taking it to sleep at night but couldn't get up in the morning and when I did I was a zombie! My doctor gave me NATURAL D-HIST by Ortho Molecular Products and its also non drowsy...try it...I am on it now and feeling much better...also 1,000 Vitamin C a day can stop the running nose...natural is best. F 59 6 months
10 1X D
 1  allergies had the bloating and weight gain, then had a emotional meltdown today....no more zyrtec for me F 42 2 weeks
120 1X D
 5  severe eczema none. claritan didn't work and benedryl made me too sleepy. it helped with severe intense itching, pruitis and fissures in skin. my Son had the same from 3 months old (3/4 tsp once a day) and it was a God send due to severe food and environmental allergies. no personality changes or visible side effects and so my kids have taken it. I will note I am extremely sensitive to medication and side effects. many effective medications for others, have extremely negative side effects for me. the reaction my be biochemical and genetic in nature. F 34 3 years
20 1X D
 1  Sinus allergies Extreme dry mouth 3 minutes after taking, dizziness, sever onset of anxiety. Weak as if I had the flu. Severe stomach bloating and gas. Headache It may work for some but never, ever again for me. I was a basket case. Had to pull into a parking lot and compose myself. Severe anxiety came over me and I felt I needed to go to the emergency room most of the day. I got home and immediately fell asleep for 3 hours. I woke up so weak that I couldn't hardly get up. I wasn't sure if it was the Zyrtec or that I was really ill. The anxiety had my mind thinking very bad thoughts of Impending doom. Beware if you take this. If you've ever experienced anxiety, I wouldn't even consider it ever!!! M 45 2 days
Low 1X D
 1  seasonal allergies vertigo and itchy skin F 58 1 weeks
10 MG 1X D
 1  Seasonal allergies 2 year old daughter started stuttering, having adverse behavior, and became very emotional...a completely different child than before she started taking it. I would NOT recommend this medicine as it made my child a completely different person! F 2 5 months
5 ml 1X D