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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 5  Allergies / Sinus Problems Dry mouth, and sleepiness. ZYRTEC has been a wonder drug for me. Since taking I haven't had any breathing problems, respritory infections, or sinus infections. I have experienced dry mouth and sleepiness, but no less than I ever have with Benadryl. The dry mouth can be pretty wicked at times, I generally take it before bed because it does make me sleepy, but I've actually found it to regulate my sleeping; I can now sleep a full 8 hours instead of my old 4-5 hours a night. When I wake up in the morning the first thing I do is run for a glass of water. M 28 6 months
 1  allergies, asthma Depression, weight gain, "zoning out" After 4 years on Allegra with no side-effects my insurance no longer covered it. I switched to Zyrtec-D and for the last 3 months I have gained weight and been very depressed. I never thought it could be the Zyrtec-D, but on my last trip to the Dr. he asked if I was feeling drowsy. I decided to stop taking it on monday, it is now Friday and boy! what a difference. I have an overall feeling of well-being and I've lost 3 pounds! I am so glad that I found this site. My co-worker told me about it and he has lost 10-15 lbs since getting off Zyrtec without changing a thing! M 31 3 months
 3  chronic allergies Waking up 15 minutes to an hour after going to sleep; says he feels hot and does look and feel a little flushed; uncontrolled crying for no reason; feeling sad for no reason. My son started zyrtec on his 8th birthday. The regimen is singulair and rhinocort in the morning, and zyrtec at night. This has helped his allergies tremendously. Then he started waking up for no reason after going to bed, feeling hot for little reason (once I thought it was from too much sun), and on numerous occasions, crying for no reason. Tonight I asked if he felt sad, and he said, "Yes, but I don't know why." Tomorrow, we will go without Zyrtec. (He had taken Singulair on and off for over a year so the mood change is not from that.) If he needs a nighttime antihistamine, I will give him what I have taken for 44 years: chlor pheniramine maleate, aka Chlor Trimeton. The only side-effect I've ever had is drowsiness. BTW, I attribute the biggest improvement in my own allergies (shots since age 5) to nasal spray (Rhinocort). None of the new antihistamines do as well as the classic old ones (Benedryl and Chlor Trimeton) but most of the new ones don't make one drowsy. M 8 3 weeks
 5  seasonal allergies none very hepful F 47 5 years
 1  seasonal allergies & environmental 10 year user of Zyrtec.....75 pound weight gain, my daily thoughts revolved around wanting to sleep, feet and hand swelling, No energy at all, No joy, No affect in my personality, sad and antisocial thoughts & irrational rage. Quite frankly, I'm scared....Hard to admitt that I didn't put this drug and what has been happening to me for the past 10 years together. I've lost a decade ... my 40's to being in the bad zyrtec haze. I did implore my doctors to help me but they never made the connection to my allergy drug.....Finally, my sister took action and researched this drug and found your website....Well, it's like reading my story over and over again. Okay, what to do....I'm trying to ween myself off and I too have the extreme itching...mainly my hands, scalp, welts on legs when I go 3 days off zrytec. My sleep patterns are so messed up trying to back off this drug. The one thing that I'm trying to be grateful for is that I feel happy for the first time in 10 + years...I'm engaging with others....I'm interested in things...Do you know how long it's been? I look at my body distorted by the awful weight gain and I'm thinking for the first time in ages...Okay lets start walking and running again....Before I w F 52 10 days
 1  Year round allergies Drowsiness, headaches, nosebleeds, weight gain, diarrhea, constipation, cramps, flu like symptoms, blurred vision, upset stomach, numbness, shakiness, hair loss I did not connect all of the side effects until I found this web site today. I even talked to my pharmacist two days ago. She said it was no side effect from the medications I use and the nosebleeds, headache, etc. may be due to a sinus infection. What a pant load! After reading the feedback here, I will not take Zyrtec any longer. I will immediately begin with my old standbys, i.e. Claritan or Dexchlor. I had used Zyrtec before (about 3 years ago for 1 year) and never connected the dots. I will definitely ask my doctor to add this as do not use to my medical record. I watch my diet, drink about 80 oz. of water per day, etc. Go figure? M 50 8 months
 2  allergies- tree poll, grass,ragweed My 4 year old son who is normally very sweet natured, quiet, and cooperative turned into an aggressive, angry, and irritable boy. He would have fits of rage that were very out of character, developed a low frustration tolerence and would often cry easily, and engaged in "mean" verbal and physical behavior to his siblings and parents. Zyrtec appeared to work well in gettig rid of my son's allergy symptoms (tree pollen, ragweed, grass), however, the behavioral side effects do not seem to be worth it. M 4 8 weeks
 4  Sinusitis HORRIBLE itchiness after stopping Zyrtec I have taken this medicine for many years, and was happy with the results until I decided to stop (my allergies had lessened after a move to the city). In 2 -3 days after stopping the medicine my entire body is covered in a horrible, hot itch that usually begins in my hands and feet- and only gets worse if you actually itch it; welts begin to raise in the places I touch. At night, the stinging itch gets so bad that I feel like there are bugs crawling all over me; I truly start to go crazy. The itch was so bad, I kept going back on the Zyrtec. Under the direction of a concerned allergist (who had never heard of this type of withdrawal before)I have been trying to wean myself off of it by lengthening the days between taking Zyrtec, and using over-the-counter Benedryl to curb some of the itching. Though the Benedryl does help a little, the itchiness has gotten more intense, and always comes back at day 2. At this point, I have made it 7 days off of the Zyrtec, and the itching has not beg F 30 9 years
 4  Severe allergies Mild lethargy - severe heart palpitations and tachycardia After six courses of allergy shots, and dozens of other prescription and over the counter medications throughout my life, Zyrtec was a Godsend for me. For the first time, it gave me a life free of itching, eczema, sneezing, asthma and recurring sinus infections, and all this with few if any noticeable side effects. However, over the past couple of years, I've experienced more and more nighttime heart palpitations, heavy heart thumping, as well as persistent tachycardia -- sometimes so much so as to keep me awake. I did not suspect it was Zyrtec until in desperation I stopped taking it. The heart symptoms completely stopped the first night. For two nights I slept like a baby. Beginning the third night after giving up Zyrtec, my allergy symptoms returned with a vengeance. I had forgotten how miserable I was before Zyrtec. I decided to take half a tablet around noon instead of before bedtime. It is better, but I am still, not sure what I'm going to do in the long run. I don't want to conk M 58 10 years
 3  allergies lethargy, weight gain Thank you to others who have posted on this site. I have been on allergy medicines for over 11 years (first Allegra, then Zyrtec). I had read that Zyrtec could cause depression. (I have not been diagnosed with depression, but was not the happy person I used to be.) I decided to try to wean myself off Zyrtec and use a Neti Pot. First, I used the Neti Pot (which is nasal saline irrigation) for two weeks, while continuing my regular dose of Zyrtec. Then, I halved my Zyrtec dose for a week. (The first day of half a dose was rather unpleasant for my sinuses, but the rest of the week was fine.) So the next week, I quit Zyrtec altogether. The first day was again unpleasant for my sinuses, but by the second day my sinuses were fine. (I was doing the Neti Pot 3 times a dayat this point, planning on weaning myself to 2 times a day once my body was used to not taking Zyrtec.) But the next day, I broke out in hives. It started on my scalp and worked down my forehead and back. By evenin F 38 8 years
 1  seasonal allergies Overly tired, WEIGHT GAIN, joint aches, I have become very spacey at normal everyday tasks! I am Extremely tired and I thought that most of these symptoms were caused by just a lack of sleep! Well after reading this site I was totally wrong!!!! I'm so glad to hear that other everyday people have similar problems! I have also had a lack of sex drive as well as extreme moodiness! I almost thought that I was pregnant! Thank goodness that I'm not because lord knows what that would have done to a fetus! But my only question is how long has it taken for these symptoms to go away!!!! The whole thing has scared me really! I thought that I was losing my mind! Literally!!! I just kept thinking just get caught up on your sleep and you'll be back to your normal self but that's never happened! I took Zyrtec today and let me tell you that it will be my last because it has affected me so much that I am about to lose my job!!!!!!! F 21 2 months
 5  severe allergies some sleepiness--I take it at night I wonder if some of the side-effects that I see on this board have to do with Zyrtec-D. I would be a mess if I took Sudafed daily. F 35 3 years
 3  allergies/ sinues problems makes me constantly lazy and lethargic, heavy tiredness, horrible insomnia, mood swings, always hungry it works for me but the side affects really bring me down. i am thinking about asking about something else. M 17 1 years
 1  for allergies I took it and experienced numbness in hands the thumbs the worse, tired, a cough,itching hunger worse. 2 daughters took it and one nose bleeds, tired, stomach aches. the other daughter is the worse. She was itching, but now twitching a lot, her hands, eye blinking, sticking out tongue, repetition of touching her shoulders each side, her arms, her hands like she is stiffing them. Her hands she holds out with palms up a lot. Its compulsive behaivor and she doesn't stop. She has been on it for two months and these all started about 2 and half weeks ago. They seem to be getting worse. I looked up side effects and saw these postings. We stopped taking it. Its been four days and not binging, her twitches are still there but not constant, starting to slow down. Its to bad these Medical companies don't post all the warnings. Like with any drug they might not affect some people and will effect others. So the ones posting with nothing effecting them your lucky. F 40 2 days
 1  Seasonal Allergies Nightmares, daytime hallucinations, hyper activity at times, lethargic at other, anti social behavior, depression, voices. My son took this drug for 6 months when he was 8 years old. It did help his sneezing, coughing. But the side effects were bizarre. He talked about seeing a 'devil boy' inside a 'ghost boy' who sat in his class in his place while he watched. He talked about hearing voices in his head telling him to do bad things. He talked about having dreams during class. And the nightmares were very vivid. My son always has been such a happy go lucky kid, his sudden dark mood swings and aggressive behavior were really out of character. If he were older I would have been looking for some sort of substance abuse issue. As it is, the 'substance' might have been actually provided for him by us unwittingly. Once we took him off the med he is doing much better at home. His nightmares are gone and he is 'singing' around the house again. Unfortunately his cough and sneezing are back, BUT we'll take that over the nightmare the family went through M 8 6 months
 1  Allergies to pollen, dust and mold I have taken Zyrtec in years past with no side effects. HOWEVER, I went back on it 5 days ago after taking Allegra for 3 months and having bone pain with that, and I am so sick, I cannot believe this is the same Zyrtec I used to take. They must have changed the formula. I am so tired and lethargic, it feels like an effort to breath. I have to drink something with caffeine just to stay awake. I have almost no appetite, can't eat more than a few bites without feeling sick. I have alternating constipation and diarrhea with severe gas. I have not taken a dose of Zyrtec today and I will never take it again. I cannot wait until this garbage is out of my system and I feel human again. I would rather just suffer with the allergies for the rest of my life. DO NOT TAKE IT! YOU WILL REGRET IT! F 34 4 days
 5  allergies Drowsiness, increased fatigue and probable weight gain. I have been taking Zyrtec for several years and it works GREAT in regard to allergies. BUT - I have always had a high metabolism and been skinny, very active, eat an incredibly healthy diet, etc. and so I have been unable to explain my mysterious weight gain over the past few years until I came across this site and learned that it could well be a side effect of the Zyrtec! I am also using Flonase which is likewise implicated. My hair has also been falling out over this same time period. I have not had any abnormal lab tests to explain this. I am going to quit both meds immediately. I would rather have a stuffy nose than be fat and bald! F 44 6 years
 5  Asthma Mild drowsiness This medicine has been great for helping my asthma symptoms. M 48 3 years
 4  allergies My 13 year old son took this medication. After about 5 days on Zyrtec we began to notice changes to his behavior, attitude, personality. Did not immediately relate it to the medication. Attitude change at school with teachers so extreme that a teacher notified me because my son "was not himself". I began to monitor and investigate. The withdrawal from wanting to be with peers and being content with just playing video games was not acceptable to us and we set down very strict rules to try to determine the cause of the changes. I went online and began to investigate the Zyrtec side effects. After reading similar accounts, I immediately stopped the meds. Within 5 - 7 days, he was back to the young person we are used to living with and the teachers agreed. I work in a mental health field and teaching youth and I constantly think about what are actually the students problems or conditions vs. what may be the side effects of meds they are taking. The extreme emotional and mental health side effects were not worth the benefits of managing the allergy symptoms with this medication. M 13 5 weeks
 1  Eczema, Asthma Mood swings, temper tantrums, violent outbursts, crying about little things, irritable. My son has suffered from eczema and asthma since he was born. He has been diagnosed and misdiagnosed many times. He was prescribed many different things from steroid creams to antihistamines of all sorts. Nothing has worked in the medical world, but zyrtec was the biggest mistake of all. My sweet little boy turns into a demon in front of my eyes and at a drop of a hat. All children have there bad days but let me tell you that this poison makes our kids into different children. My heart breaks that I had no warning from his doctor or on the label. Its not fair that these poor babies suffer not only with the aliment they are cursed with, but with extra symptoms caused by something meant to help them. They are little people with no voice. These drug companies should be ashamed!! Parents if you are here its to late you have given your kid this drug. Please stop ASAP! M 3 2 months