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Doctor insights on: Ceterizine Side Effects

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What are cetirizine tablet side effects?

What are cetirizine tablet side effects?

Generic for Zyrtec (cetirizine): The most common side effects of Cetirizine are sedation and dry mouth.
Children typically tolerate the sedative effects better than adults but parents have reported changes in personality and mood amongst my patient population under the age of 7 years. Overall Cetirizine is a very effective once a day antihistamine in the class of 2nd generation antihistamines. ...Read more

Dr. John Chiu
575 Doctors shared insights

Cetirizine (Definition)

Ceftirizine is the generic name of an antihistamine previously marketed under the ...Read more


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Any bad side effects of zyrtec (cetirizine)?

Any bad side effects of zyrtec (cetirizine)?

Sleepiness: 10% of the patients will experience sleepiness.Best time to take it is at bedtime to cut down this side effect. ...Read more

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What are the side effects of zyrtec (cetirizine)?

What are the side effects of zyrtec (cetirizine)?

Minimal side effects: The side effects of zyrtec (cetirizine) are minimal compared to old antihistamines. Very small incidences of headache, sleepiness, abdominal pain, dry mouth, and nose bleeds have been reported. ...Read more

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What are the side effects of zyrtec, (cetirizine) if any?

What are the side effects of zyrtec, (cetirizine) if any?

Sleepiness: The major side-effect of zyrtec (cetirizine) is sedation - sleepiness, fatigue, and slowed reaction time. This occurs in 1 out of 10 or 1 out of 12 users. Compare to Benadryl (diphenhydramine) 1 of 3 users or clariting 1 in 50 users. Also occasionally reported are stomachache, headache, diarrhea, constipation & dry mouth & throat. In older men zyrtec can sometimes cause difficulty with urination. ...Read more

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My brother took too many zyrtec (cetirizine) tablets. Side effects?

My brother took too many zyrtec (cetirizine) tablets. Side effects?

Drowsiness: Most likely will be drowsy. There can be respiratory suppression, at which point he would need to been evaluated in an emergency center. However, call poison control in your area to see if they have any other suggestions. Otherwise effects will wear off over time. ...Read more

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Hi. What could be the side effects if a person consumes 30mg of cetirizine per day without any consultation or with no need to take?? of age 15 yrs?

Hi. What could be the side effects if a person consumes 30mg of cetirizine per day without any consultation or with no need to take?? of age 15 yrs?

Depends: It depends on why cetirzine is being taken for. Having said that this is a relatively safe drug. Whether an allergy consult is needed or not depends on the disease conditions themselves. ...Read more

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1 of my friend started taking daily 20 mg of cetirizine without any requirement. She is of 15 yrs. What are the possible side effects if she continues?

1 of my friend started taking daily 20 mg of cetirizine without any requirement. She is of 15 yrs. What are the possible side effects if she continues?

Usual dose: Is 10mg/day. This medication is safe when used in recommended dose and duration. Side effects of excessive usage are dry mouth, weakness, difficulty urinating, etc, available in product insert. It should not be taken at this dose indefinitely. ...Read more

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Side-effects of cetirizine?

Side-effects of cetirizine?

A few.: Not like benadryl, (diphenhydramine) which has major anticholineric issues, it still can cause drowsiness, dry mouth. It is a very effective and highly specific h1 blocker, which reduces allergic sx. ...Read more

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What are the side effects of zyrtec (cetirizine) and how can I prevent them?

What are the side effects of zyrtec (cetirizine) and how can I prevent them?

Effects vs sides: The most common side effect is sedation, about 13%. Sometimes taking before bedtime helps, but some people still are affected and need a less sedating antihistamine. Refer to the drug information label for other side effects. ...Read more

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Are there side effects of mixing the medicine zyrtec (cetirizine) with alcohol?

Are there side effects of mixing the medicine zyrtec (cetirizine) with alcohol?

Possibly: Alcohol causes sedation (sleepiness). Zyrtec (cetirizine) can cause sedation (not in everyone, but in many). Mixing the two can compound the effect - making you extra sedated. Extra sleepy. But then that can translate to greater impairment in judgement. Meaning - not thinking clearly.... ...Read more

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Are there any side effects to taking Zyrtec, (cetirizine) lysozyme, kaloba long term in children 2-4 years old?

Are there any side effects to taking Zyrtec, (cetirizine) lysozyme, kaloba long term in children 2-4 years old?

Yes: There are side effects or potential side effects to all medications, supplements, vitamins, therapies, and life in general. A decision to use or not use any treatment is always a risk vs benefit analysis. You should discuss this with your children's doctor. ...Read more

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Side effects of using zyrtec (cetirizine) for hives?

Side effects of using zyrtec (cetirizine) for hives?

Read PI: All medications that are available have included a package insert that describes what the medication is and its side effects. ...Read more

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What are the long-term side effects of cetirizine hydrochloride?

None: None that I'm aware of. I personally have taken it daily for >10 years without adverse reaction. ...Read more

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What are the long-term side effects of cetirizine hydrochloride? Say, taking it 6 months?

What are the long-term side effects of cetirizine hydrochloride? Say, taking it 6 months?

None.: Cetirizine makes 10-15% of people sleepy. Other than that it is very well tolerated. It is actually a metabolite of hydroxyzine, an antihistamine that has been around for decades. ...Read more

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What could be the side effects of a small cetirizine and diazepam overdose?

What could be the side effects of a small cetirizine and diazepam overdose?

Increase of sedation: Cetirizine is a sedating antihistamine and when added to diazepam/valium (a hypnotic) can compound the effect of sedation. If just 2-3x the usual dose may not cause much more than prolonged sedation, but if excessive od of diazepam and cause respiratory depression/low oxygen which may trigger hypoxic injury to your brain/heart. Be carefull, be safe, take meds only as given. Consult doc. Good luck. ...Read more

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I think my 2 yr old has allergies. I bought childrens zyrtec (cetirizine) but im afraid of side effects. Is it more common for insomnia?

I think my 2 yr old has allergies. I bought childrens zyrtec (cetirizine) but im afraid of side effects. Is it more common for insomnia?

Not really: Zyrtec (cetirizine) is able to cross into the brain and effect the thinking process. Most kids or adults are actually sedated by its actions, which is why they advise giving it in the evening. A percentage of folks will have the opposite effect, probably 1/20, which could interfere with sleep.The response is unique to each & consistent. You can try it once and see if the kid gets hyper. If not it should work fine ...Read more

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How common is urinary retention from chronic use of zyrtec (cetirizine)? Any other side effects? I was prescribed to take it everyday but doc never mentioned this

How common is urinary retention from chronic use of zyrtec (cetirizine)? Any other side effects? I was prescribed to take it everyday but doc never mentioned this

Not common: Any antihistaminic can cause urine retention, but it's a rare side effect, other side effects such as dry mouth, somnolence r more common, usually common side effects r written on the patient info leaflet dispensed with drugs, or on boxes for over-the-counter meds. ...Read more

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Can I take both Flonase And Zyrtec (cetirizine) at the same time to treat allergies? Would there be other side effects, particularly heart related?

Can I take both Flonase And Zyrtec (cetirizine) at the same time to treat allergies? Would there be other side effects, particularly heart related?

Yes: It is quite common to use flonase and zyrtec (cetirizine) together for treatment of seasonal allergies. There is noincreased risk from using both together, theya re a different class of medication. ...Read more

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Took Zyrtec (cetirizine) last night, within a few hours, itchy throat. Possible side effect? Besides the side effects it does help. After much resesrch, many complaints with Zyrtec (cetirizine) causing itchiness. Is it safe?

Took Zyrtec (cetirizine) last night, within a few hours, itchy throat. Possible side effect? Besides the side effects it does help. After much resesrch, many complaints with Zyrtec (cetirizine) causing itchiness. Is it safe?

Zyrtec, (cetirizine) itchy: DO NOT take zyrtec (cetirizine) again, the itchiness is a sign of an allergic reaction to a component of the formulation. Allergic reactions are serious. Call you doctor or go to an urgent care today to see what you can take ...Read more

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Is severe itch a common side effect of discontinuing zyrtec (cetirizine)? If so, how long will it last and what can I do to cope?

Is severe itch a common side effect of discontinuing zyrtec (cetirizine)? If so, how long will it last and what can I do to cope?

It is not.: Presuming that you were taking zyrtec (cetirizine) for the itching, the itching would return when you stop taking zyrtec (cetirizine) unless you can eliminate the cause for the itching. ...Read more

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I am 5''4 and I am now 125lbs. Last year I started back taking topomax along side zyrtec (cetirizine) for daily migraines. I weighed 130 before. When to worry?

I am 5''4 and I am now 125lbs. Last year I started back taking topomax along side zyrtec (cetirizine) for daily migraines. I weighed 130 before. When to worry?

No worry: Because it is not extensively metabolized in the liver, topiramate and is prescribed for a variety of pain disorders including the prophylaxis of migraine headache. Side effects include cognitive difficulties, sedation and fatigue, kidney stones and weight loss. A potentially serious side effect is acute glaucoma which manifests itself as blurred vision. If concerned consult your doctor. ...Read more