ZYRTEC Reviews (CETIRIZINE HYDROCHLORIDE)

Average Rating: 2.0 (1816 Ratings)

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 Type: Over-the-counter Drug

  

Results are sorted by Age from youngest to oldest (reviews with no age reported listed first).

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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RATING  REASONSIDE EFFECTS FOR ZYRTECCOMMENTSSEXAGEDURATION/
DOSAGE		DATE ADDED
 
 2  2 year olds ear infections My 2 year old son was put on zyrtec for recurrent ear infections. He had a major bahavioral change take place. Uncontrolled temper tantrums for something as simple as taking off shoes. Thought it was just normal 2-year-old changes in behavior, but after stopping the medicine, his behavior has returned back to normal. Be careful when giving this drug to your children! F 2 5 weeks
2.5 mg 1X day		 2/10/2010
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 2  Toddler Allergies Took my toddler off of the Children's Zyrtec after a few months because when I used it, it made him tired and cranky. I had to switch to Claritin, which is not as good but less side effects. Doc said that sometimes the sensitivity to Zyrtec seems to be hereditary. I tried adult dosages and even half doses and it still made me too tired. F 2 60 days
1X day		 6/28/2011
 2  Allergies I put my 2 year old on this medication and the next days saw a mood difference. He was constantly doing something to get in trouble, moody and aggressive. I was very displeased. I was made to believe it was safe for children but I’ll take the allergies over aggression. I wanted to make sure it was the medication so I tried it once more and the next day after giving him the medication at night, again he was moody and aggressive and not himself. M 2 7 days
 3/12/2019
 1  Seasonal allergies My son became very fussy, woke up crying from naps and sleep, threw tantrums for no reason, started banging his head on hard objects. His speech dropped off and he stopped being his usual happy, affectionate self. M 2 4 days
 5/26/2009
 1  seasonal allergies My 2 and 1/2 yr old son was on zytec (liquid - 1/2 tsp) for red itchy eyes for the last 3 days... the drastic change I have seen in him is FRIGHTENING. Our normally calm, sweet, mindful boy was combative, hyper, defiant, and not listening to me to the point that I had to put him in the car b/c I was so wrought out. After reading several comments from others, I have now realized that it is the Zyrtec that is making him act this way. My husband and I are NOT giving this tom him effective tonight... I just hope his behavior stops as soon as we stop giving him the Zyrtec. I wish that someone would have informed us of this awful side effect OR the box would warn us!!! Shame on them!!!!!! M 2 3 days
 6/2/2009
 1  Prescribed by allergist Severe mood swings, aggresiveness, night terror, fatigue. My two year old has severe asthma and allergies. His allergist prescribed Zyrtec about six months ago and he takes it every night, which was suggested. I noticed right away, he cleared up, but I also notice that almost every night since then, it is a chore to get him to sleep. He has severe tantrums, will not sleep and when he finally does sleep, he wakes up in the middle of the night several times screaming. I kept thinking that is must be because of his 'terrible two stage,' but the more I read, the more I feel like I have been poisoning my son for 6 months now! What are other parents doing for their kids allergies? I know he needs to take something to clear him up, but Zyrtec is not the answer. M 2 8 months
 8/3/2008
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 1  seasonal allergies, eczema our 2 year old daughter was prescribed zyrtec for a bad eczema outbreak/seasonal allergies. after taking 2.5 mg for 2 days, her behavior became completely out of control. horrible tantrums, hyperactivity, screaming fits. much worse than her usual acting out. it was like a switch had been flipped. we are going back to benadryl. do NOT give this to your kids F 2 2 days
 7/2/2008
 1  2 year seasonal allergy Gave my two year zyrtec for seasonal allergies and it caused irritability and sleepiness. She would get up screaming at night and then be wide awake for a few hours before I could get her back to sleep. Should not give this to children. F 2
6/3/2008
 1  allergies Our doctor recommended zyrtec for our 2 yr old daughter for a an extreme allergic reaction/hives(cause undetermined) we will never gives this drug to her again, never, extreme irrational temper tantrums, not a normal tantrum, aggressive odd behavior. we stopped taking giving her this drug after reviewing all these similar posts. extremely disappointed in doctor for not warning us of these possible side effects. F 2 7 days
 1/1/2010
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 1  Allergies/Eczema My 2 year old son was aggressive and wound up for most of the morning into the afternoon. He is normally a great napper and a polite child at daycare. His aggression, lack of a nap, and general whiny and defiant behavior caused me to discontinue use immediately. The next day, he was a dream again. M 2 1 days
1.5mg 1X day		 7/28/2016
 1  2yr old taking for seasonal allergy Was going to give my daughter Zyrtec tonight. Her doctor prescribed this for seasonal allergies. She was taking Claritin before given this and from what I am reading ,the Claritin was giving my daughter the same side effects: Mood changes, not eating, not sleeping, just not my same baby! She was very beside herself. After reading these reviews I will NOT be giving Zyrtec to her either. It is awful that young children have to go through such side effects for something that is supposed to be helpful. F 2 1 days
1 MG 1X day		 4/8/2011
 1  Seasonal allergies My two year old son, who has always been sweet, loving and agreeable started taking Zyrtec for seasonal allergies and his entire mood, demeanor and attitude completely changed. He started acting like a different child. He became angry, violent, didn't want to eat, irritable, weepy and clingy. He would wake up screaming NO at night, when he never had sleeping issues before. He would smash his head on things, hit himself, pull out his hair and crush food and throw it everywhere when he was frustrated, sad or scared. The only thing we can attribute these changes to is the Zyrtec. All these symptoms started when he started the medicine. I have stopped giving it to him after reading this website because I now know I am not crazy! Thank you for posting this information so parents like me are more informed about what their child is really getting. I am disgusted that these possible side effects are not disclosed in the packaging!!!!!!!!! It is HORRIBLE and I will NEVER give it to my child again!!!!!!!!! M 2 2 months
10 MG 1X day		 8/30/2010
 1  asthma, wheezing, hives My 2 y/o son is taking Zyrtec at advice of allergist. We tried Singular, but he had anger side effects with that medication. Since starting Zyrtec, my son has gone from sweet boy to anger-man. He hits himself, he throws things, he constantly says, "I can't, I can't!" He woke up last night screaming in fright (hasn't done that in over a year). He's just so negative. After reading comments here, I'm taking him off. As an aside, I had chronic idiopathic urticaria when I was younger (still comes back every now and then). To keep it under control, I took a combo of Tagamet (yes, the stomach acid medicine) and Claritin. My doctor said there is a secondary ingredient in Tagamet that works like Benadryl, but without the sleepy side effects. It might be worth discussing with your doctor if you are trying to find a non-itch solution. M 2 3 weeks
5 mg 1X day		 10/19/2010
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 1  Seasonal Allergies Stuttering and tantrums We started noticing that our 2 year old had started stuttering and finding it difficult to talk when she previously had no issues. We have stopped using zyrtec now. What a scary medicine. F 2 3 weeks
2.5 mg 1X day		 12/12/2017
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 1  congestion My daughter,2, started taking the target brand and every day, all day was a fight and tantrum. She started banging her head HARD. She also stopped eating which I thought the tantrums were coming from.I had forgot to give her her med. and I noticed the tantrums stopped, her behavior returned to normal, and she stopped banging her head. Its like night and day.I wouldn't recommend this for any child. Especially if you as a parent don't want to jump off a cliff! NEED TO POST SIDE EFFECTS!!! F 2 2 months
2.5 ml 1X day		 6/28/2010
 1  Allergies When our daughter was around 2 years old, the doctor thought she was having allergies and told us to use children's liquid Zyrtec. She has always been a very laid back, easy going child, but she started having meltdowns at the smallest things, unable to sleep through the night (she would make this odd wailing sound off and on through the night), and was just overall EXTREMELY irritable. In short, she was the total opposite of herself - it turned her into a bit of demon child. At first we chalked it up to beginning the "Terrible 2's", but after a few weeks it finally hit me that it all started about the time she was put on Zyrtec. I Googled it and found similar stories in several places, so immediately stopped giving it to her. The difference was immediate - she slept through the night the very first night after we stopped, and within 48 hours her normal disposition had completely returned. My guess is that majority of the population is not affected by Zyrtec, but for the people who are, it can totally change who you are as a person. Take careful note of your disposition (or your kids' disposition) after you start this drug. F 2 3 weeks
1X day		 2/14/2012
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 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 day		 7/29/2013
 1  allergies irritablity, sleepy My son was prescribed Zyrtec for allergies. The second day he took it, we noticed a change in his behavior. I know toddlers are normally a bit challenging, but this was beyond his norm. He was having temper tantrums over things that normally didn't bother him. He was also having meltdowns over small things. I found this website and decided that he'll no longer be taking this medicine. If he was so ill behaved after two doses, I have no desire to see what would happen for a longer period of time. M 2 2 days
 9/22/2007
 1  seasonal allergies This is actually a rating for my 2 year old daughter's experience. Her doctor recommend OTC childrens zyrtec for slight seasonal allergies. We thought she had suddenly and aggressively started with the terrible two's. She was having constant meltdowns over the tiniest things, hitting constantly, and just being downright malicious. Finally I happened to mention to my sister that my child was on Zyrtec and she told me to take her off it. Turns out my sister gets the same side effects on this drug and since then I have met many people who say that they have had the same experience. My daughter reverted back to her happy-go-lucky, joy to be around self in a matter of a few days. She will NEVER take this medication again. I have started to notice some of these side affects in myself when i started to take Zyrtec this year. I am switching to claritin or allegra. F 2 3 weeks
1 pill 1X day		 4/26/2013
 1  Suspected allergies My almost-2 year old daughter started taking zyrtec because we thought that her coughing and sneezing was due to springtime allergies. Her personality totally changed on the zyrtec. She threw terrible tantrums, was completely irrational and unhappy, and became extremely moody. She would wake up at night screaming and crying and was very difficult to soothe. She became almost like a different person. Once I suspected the zyrtec was the root of the problem, I took her off immediately (she was only on for about 4 days). Within 2 days, she was back to her old self. I STRONGLY adivse parents who are prescribed zyrtec for their children to monitor them closely and look for behavioral changes. No one warned me about it and I am just so thankful that we realized it so quickly. My ped had no idea about the side effects (and I am not sure I was able to convince him of it). BEWARE! F 2 4 days
 8/7/2006

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