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A 32-year-old member asked:

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

1 doctor answer1 doctor weighed in
Dr. David Martin
ENT and Head and Neck Surgery 28 years experience
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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CA
A 44-year-old member asked:

Are there major differences between loratadine and cetirizine?

2 doctor answers12 doctors weighed in
Dr. Andrew Murphy
Allergy and Immunology 29 years experience
Not really: Both are antihistamines that work well. There may some subtle differences between the two but in general either one is a good choice.
A 37-year-old member asked:

What is the difference between zyrtec and xyzal (levocetirizine)?

4 doctor answers8 doctors weighed in
Dr. Jason Black
Internal Medicine 25 years experience
Very similar: Zyrtec is the brand name for the molecule cetirizine, whereas xyzal is levocetirizine, the mirror image. Xyzal came to market when zyrtec was going generic and over-the-counter. There are subtle differences between the two, but they behave very similarly.
CA
A 26-year-old member asked:

Are there any long term effects to taking zyrtec (cetirizine) everyday?

2 doctor answers2 doctors weighed in
Dr. David Finke
Obstetrics and Gynecology 15 years experience
No, but rarely yes.: Zyrtec (cetirizine) is pretty well-tolerated and now is over the counter. You should check with your doctor if you have known liver disease or experience difficulty breathing, seizures, or low blood pressures.
A 30-year-old member asked:

What is cetirizine hydrochloride used for?

1 doctor answer2 doctors weighed in
Dr. Andrew Murphy
Allergy and Immunology 29 years experience
ANtihistamine: Cetrizine is an antihistamine and is used for allergy symptoms.
A 41-year-old member asked:

How does zyrtec (cetirizine) (reactine) 10 mg work?

1 doctor answer1 doctor weighed in
Dr. David Rosenthal
Allergy and Immunology 21 years experience
Zyrtec (cetirizine) = Cetirizine: Zyrtec (cetirizine) is a long action, non-sedating antihistamine. It works well for many people. It functions by blocking histamine release from cells, thereby stopping allergic symptoms.

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Last updated Apr 3, 2019

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