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Doctor insights on: Zyrtec

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Dr. John Chiu
543 Doctors shared insights

Zyrtec (Overview)

Zyrtec is a non-sedating antihistamine which is a kind of antihistamine type drug (common cold or symptom drug).


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What is zyrtec (cetirizine) used for?

What is zyrtec (cetirizine) used for?

Allergies and hives: Zyrtec (cetirizine) is a new generation antihistamine that is FDA approved for relieving the symptoms of :: Seasonal Allergic rhinitis (hay fever) from pollen in patients over 2 years old Perennial allergic rhinitis: year round allergies in patients over 6 months old Chronic Urticaria (hives) in those over 6 months old It has been shown to prevent itching and decrease size of mosquito bites!

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Dr. John Chiu
543 Doctors shared insights

Zyrtec (Overview)

Zyrtec is a non-sedating antihistamine which is a kind of antihistamine type drug (common cold or symptom drug).


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I had 2 zyrtecs (cetirizine) by mistake, what to do?

I had 2 zyrtecs (cetirizine) by mistake, what to do?

Nothing: This will have the primary anti-allergic effect but not cause any other issue except possible a little induced sleepiness if you are susceptible. This amount will cause nothing worrisome.

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Please describe the medication: zyrtec (cetirizine)?

Please describe the medication: zyrtec (cetirizine)?

Anti histamine: Zyrtec (cetirizine) is an over the counter antihistamine medication used to treat itching, hives and other allergic symptoms.

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I went to insta care here in florida the other day. The doctor proscribed Flonase naisal spray and changing my allergy meds to zyrtec (cetirizine) is this ok?

I went to insta care here in florida the other day. The doctor proscribed Flonase naisal spray and changing my allergy meds to zyrtec (cetirizine) is this ok?

Cross-check: There shouldn't be any problem taking the 2 of them together. Just talk to your pcp or pharmacist to make sure you aren't duplicating anything and accidentally doubling up. The main goal should be managing your allergies by reducing exposure to triggers and keeping symptoms at bay.

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My doc prescribed me Zyrtec (cetirizine) 10 drops twice a day. I get drowsy with it. I also have classes on Monday. I find it hard to stay full awake.

Try others: You can either reduce the number of drops required without causing drowsiness or better still change to other antihistamines such loratadine or fexofenadine which would not likely have drowsiness effects.

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How effective is zyrtec (cetirizine) syrup for toddlers in treating cough?

How effective is zyrtec (cetirizine) syrup for toddlers in treating cough?

Toddler cough: Hello, zyrtec (cetirizine) is an antihistamine that may help with allergic disease. It will also help dry up excessive watery drainage. If your child has a cough linked to an allergic condition or possibly asthma, then zyrtec (cetirizine) may be very helpful. Check with your doctor for confirmation.

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Can zyrtec (cetirizine) work with food allergies?

Can zyrtec (cetirizine) work with food allergies?

No: No, zyrtec (cetirizine) does not work to prevent you from getting an allergic reaction to food or to treat food allergies. Food allergies can present with different clinical symptoms and can be life threatening. Currently strictly avoiding the food is the only treatment. Only a few centers do food desensitization. If you have real food allergy, you should see an allergist specialist.

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I took two zyrtec (cetirizine) by mistake by the same time for dangerous?

I took two zyrtec (cetirizine) by mistake by the same time for dangerous?

No: Just try to avoid taking any other anti histamine for the next 24 h you may also avoid driving to tuning heavy machinery as u naught be sleepy.

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I never drink but today I was extrememly upset and I had 2 shots of Moscato rubino, can I still take my 75mg topamax (topiramate) for H/A and 10mg Zyrtec tonight?

I never drink but today I was extrememly upset and I had 2 shots of Moscato rubino, can I still take my 75mg topamax (topiramate) for H/A and 10mg Zyrtec tonight?

Never mix: Do not risk a significant side effect by mixing alcohol and drugs. This can potentially increase the toxicity of these medications with serious adverse outcomes. It is simply not worth it.

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Doctors, how much zyrtec (cetirizine hydrochloride) is a lethal dose?

Uncertain: I am unaware of any study on human re. The lethal dose but have heard of people taking up to 8 tablets a day without serious side effects.

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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.

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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.

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How long does it take for zyrtec (cetirizine) to be out of your system?

How long does it take for zyrtec (cetirizine) to be out of your system?

Effects of Zyrtec (cetirizine): The half-life of Cetirizine (the time it takes for your body to get rid of half of the drug) is about 8 hours. The vast majority should be gone within about 24 hours.

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I have very bad allergies. Allegra (fexofenadine) 180 use to work but it wears off fast. Zyrtec doesn't do anything what should I do. Always congested & feeling bad?

I have very bad allergies. Allegra (fexofenadine) 180 use to work but it wears off fast. Zyrtec doesn't do anything what should I do. Always congested & feeling bad?

Other meds: Antihistamines do not manage congestion well which is why decongestants are often added. Singulair (montelukast) and nasal steroids manage all allergy symptoms and in head to head comparisons steroid sprays control symptoms better than oral antihistamines. Topical spray antihistamines are also an option. Allergy shots help reduce or eliminate medications in 2/3 of patients so may need to see allergist.

Dr. John Chiu
563 Doctors shared insights

Cetirizine (Definition)

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