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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30 MG 1X D
 1  allergies I have gained weight around my middle where I have been previously thin my entire life. I originally attributed this to stress. When I try to go off Zyrtec, I experience itching all over my entire body. I have only been able to go off of it for five days before I cant take the itching and begin to take it again. The withdrawal from this drug makes it not worth taking in the first place. F 24 1 years
10 mg 1X D
 1  allergies numbness of tongue, lost my sense of smell and taste, sense of touch was "odd" and unexplainable, depression, mood swings, fatigue, tiredness F 28 2 days
10mg 1X D
 1  seasonal allergies anger, shouting outbursts, obsessive thoughts, long uncontrollable tantrums where he acts possessed and is unable to control is body or stop the tantrum It took about 5 weeks for the side effects to build to where I was going to contact the school social worker, although his teachers said he was doing fine at school. Didn't think of the medicine right away because it wan't an immediate reaction. But then I thought I'd check if it could be the allergy meds he has been taking. Thank goodness for this website & comments. VERY HAPPY to report that 24 hours after his last dose he was soooo much better. 48 hours and I have my little boy back. I can hug him without him growling back at me. I just hope there are no lasting effects. He is still taking Flonase for allergies. M 5 6 weeks
5mg 1X D
 4  Allergies The only side effect I had was major panic attacks.I quit taking it,I have never had another attack!!!! F 43 3 years
30 mg 1X D
 5  Itchy Hands and Feet None that I can tell, except the relief from itching. I've been reading all the negative reviews about Zyrtec because after 2 years I find I actually need to increase the dose to have the same effect. I spoke with my doctor first and went ahead with the increase. I decided to check what people were saying about it. For me, Zyrtec has been a miracle drug! Before I took it, I itched so badly that I couldn't sleep. It has completely removed all of my symptoms. My hands and feet (and ankles and wrists) used to itch so bad that I was scratching myself up trying to get relief. Now that I have Zyrtec (actually, I take the generic Aller-tec from Kirkland), I sleep at night and can wear my rings. I do get night sweats, but who knows if that is from this drug (I'm 47 years old). I'll take the night sweats over the itching if that comes from the drug. I take one 10mg pill every night. My only worry is that it will stop working one day. I used to take Claritin, but it became completely ineffective after about 6 mos of regular use. Zyrtec has continued to work for 2 years of regular use. So we'll see... F 47 2 years
10 mg 1X D
 2  eye allergies I am so ridiculously happy that I found this forum. I have been hanging out with friends and should be having a blast considering the weekend but found myself not having fun as things progressed. I have had unexplained depression, definite anxiety, bizarre dreams, and mild panic attacks. I am certainly not feeling like myself at the moment. It's been bad enough that I've pondered asking for anti-anxiety drugs from my doctor. I started suspecting a problem with the medicine last night as I had a panic attack within 15 minutes of taking it. I'm not one to ever have a panic attack under any situation. Looking back, these problems started and have continued to get worse since being on the drug. Other than the obvious problems which will keep me from ever taking the drug again, it did seem to help my eyes. M 34 2 weeks
10 mg 1X D
 5  Chronic Hives I didnt relialize ther were any symptomes My 3yr.daughter has been suffering with very puffy and itchy hives all over her body since last summer , I didnt know what to do or to give her. So we went to her doctor and she just gave her benyadryl and said it was a allergic reaction from something she ate. But they got worst evey day ,changing in size ,in color and in size. So they finally recomended me to a allergist but he just made me write a diary for 4weeks to see what she eats ,what type of soap she uses ,etc. And made me give her more benadryal but 4 times a day this time but the hives got 2 times worst , knowing something is wrong I stopped the medican realizing that she is allergic to benadryal ! (Long story short) - We finally switched her to zyrtec amd I really thanked God for this medican Because since the first.time she took it the hives completely stopped. BUT..... The last few months she has been going through the same thing that everyone else is going through on this site : Being out of control angry ! , can't sleep , night mares when she does , does not listen, . rapid weight gain . ( 5lbs in 1 month thats alot for a toddler) I thought it was just a faze she was going through a toddler stage maybe. But I recently stopped her from it, now knowing it was the carpet she was allergic to. And now I know that it was the zyrtec that made her act that way . I feel so bad that my baby had to go through this. Thanks for the site. But dont rule zyrtec out yet it did work fast just make sure you m F 29 6 months
10 1X D
 1  Allergies Constant headache and extreme drowsiness. I took zyrtec at night the first time and by morning I woke up with headache. I have been extra sleepy and need more sleep then I ever had. I didn't think that it could have affected me so quickly but it is the only medicinal change that I have made. The improvement to my allergies is not worth the headache (that doesn't go away with pain medicine) or extreme sleepiness. Hope this helps others who are struggling with headache side affects as main source of frustration. F 34 4 days
10 mg 1X D
 1  allergies Severe rage, insomnia 4 yr old DD would have bouts of SEVERE RAGE, couldn't sleep - not worth it... it only slightly helped her allergies F 4 3 weeks
1X D
 2  Indoor/outdoor allergies Exhaustion, fatigue, hives, unable to lose weight, foggy brain, depression, anxiety. I found this site because I have been taking this for quite some time and have not really looked into side effects. It helps with my allergies as far as sinuses and itchy eyes. I have broken out with hives on and off most of my life, so i'm not sure if the medication has anything to do with it although i have been EXTRA itchy lately. Spots on feet and hands. I have had a hard time losing weight, depression and anxiety issues also. Again I had these symptoms before starting zyrtec. I stopped taking it yesterday and went back to claratin because i don't want to take any chances. I will update if i notice a change in energy, mood or breakouts. F 31 5 months
10 mg 1X D
 2  Allergies Like other posters mention, I freaked out. I would yell at my husband and feel no remorse over my actions until the Zyrtec wore off. It was scary. The allergies were at bay, except for the hives. I've learned how to manage my allergies by having my food allergies diagnosed which lessens my seasonal allergy symptoms. Considering the hives were not addressed and I was a psychotic soon to be divorced wife, I'm happy to report that now we're all happy again. And btw Weight Gain, check. M 43 60 days
1X D
 2  Seasonal allergies fatigue, irrational thoughts, anxiety/paranoia I took 1 pill 2 days ago, about 1 p.m. About 15 minutes later, my heart raced for a minute or 2, then a weird sleepy/calm/mellow took over. I felt better, but tired, the rest of the day. Yesterday and today (still!), I have been super exhausted and had oddly anxious and paranoid thoughts. I had to go to bed at 9 p.m. last night because I could not stay awake any longer. I will not be taking this again. F 33 1 days
10 mg 1X D
 1  runny nose, allergies, red eyes fatigue, weight gain, bizarre dreams I took Zyrtec for 3 months and it worked great in clearing up my runny nose and red eyes. Within that 3 months I gained 10 pounds and have no energy. I'm a very healthy eater and I've worked out daily for years so I couldn't figure out why I was putting on weight. Once I figured out the only change I've made to my lifestyle was Zyrtec, I got off it immediately. I've been off it 2 weeks now and my energy is slowly slowly coming back but I'm having a rough time losing the weight. F 47 3 months
1X D
 1  Allergy My wife experienced an extreme mood swing. We woke up this morning and my wife was complaining about her allergies and asked me to go the store and buy some zyrtec. So I did and when I got back home I gave them to her and she took one right away. I made the family some breakfast, set the table and served everyone. We were having a nice conversation with our daughter and everything was fine and we finish breakfast. My wife asks me to get the laptop to figure out where we should live since we're moving soon and so I bring it over to the table. After setting it down I say "well let me put the dishes away real quick first." She frigging flips out saying I'm obviously just trying to establish my dominance by ignoring her and doing whatever I want. She proceeds the flipping out and throws my clothes on the ground and yells at me to get out and she's had enough of me and a couple other expletives. I'm a little disturbed but I know my wife and she isn't like this. I decide to leave and let things calm down. Thank god I made the connection right away and found this website. It's now posted as a link on my facebook account to warn others about this possible side effect. F 36 1 days
10 1X D
 1  allergies Night Sweats, fatigue When I moved to Spain they switched me from using Xyzal to Zyrtec because they didn't carry Xyzal, and after the first few months I started noticing horrible night sweats. The sheets are wet, my clothes are soaked! I'm more tired than usual as well. It worked for the allergies but I'm losing sleep from being soaked half way through the night. F 30 90 days
10 mg 1X D
 1  allergies aggression, hiting, biting others, hyperactivity, irritable, change in behaviors, change in personality and sleeplessness. These behaviors occurred gradually. I was not warned by my allergist that these are possible side effects. My son started zyrtec the same time my daughter was born so I thought his behavior changes were due to the changes in our home. After taking him off zyrtec, I immediately noticed an improvement in his behavior. He wil not be taking zyrtec again. M 2.5 4 months
1/2 teas. 1X D
 1  allergies Mood disturbance, severe withdrawal symptoms My 9-year old son started taking Zyrtec in the fall for seasonal allergies. He also has food allergies and has taken Zyrtec on occasion, but never for an extended period before. After two months, we tried to stop, but he developed the itching many other posters have complained about. Our pediatrician told me not to read blogs and to keep him on 10mg/day and to see the allergist. The allergist's nurse said we could not come in unless he'd been off the Zyrtec for 5 days, but he could not stop the Zyrtec without the itching - a vicious cycle. Finally, after reading more online, I insisted on talking to the allergist, who got on the phone and confirmed that the itching is a withdrawal symptom. Basically, he said, your body gets used to the histamines being suppressed; when they flood back, some peoples' bodies overreact. He said prednizone would help and that the itching would go over in 2-5 days, but I didn't want to give my son steroids, and the itching persisted and was unbearable. I switched him to Benadryl (shorter-acting) and followed a step-down approach. A week at 3/4 of a 25 mg pill at bedtime; then a week at 1/2 a pill; then a week at 1/4; then a week at 1/8 (After cutting the 25 mg pink pills in half, I bought the children's 12.5 mg fast melt tablets and cut those in half, then in quarters). My son has now been off all antihistamines for 4 days and is still slightly itchy from time to time, but I think we're over the worst. His mood has also improved markedly. M 9 5 months
10 mg 1X D
 1  Allergies extreme anxiety, extreme depression, rage, anger, violent dreams, hopelessness, sleeplessness, paranoia, fatigue, increased appetite, weight gain, mood changes, irritability, inability to concentrate, personality change, and suicidal thoughts. I have been living in hell because of Zyrtec, it drained the life out of me and i had no idea what was going on, I have been off for about 12 days and have been so much more at peace, all the symptoms are slowly going away, within 48 hours no depression no anxiety, the only thing now is the itch that lasts for 2-3 weeks called zyrtec withdrawal M 30 7 years
10MG 1X D
 4  Year round allergies Chronic fatigue and weight gain I have been wondering lately why I've been gaining weight and I can never seem to get enough sleep. Zyrtec is the only medication I take so I decided to google it's side effects. I was shocked to see everyone's horror stories. I just bought another bottle today, but now I want to throw it in the trash. I'm worried about being able to quit the drug. The sad part is that it works great on my allergies. Good luck everyone in getting off of it. F 32 140 days
10 1X D