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how long does it take cetirizine to work

A 40-year-old member asked:
Dr. Michael Zacharisen
33 years experience Allergy and Immunology
About 1 hour: Onset of relief with zyrtec (cetirizine) is about 1 hour.

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A 32-year-old member asked:
Dr. David Martin
28 years experience ENT and Head and Neck Surgery
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 withi ... Read More
A 33-year-old member asked:
Dr. Michael Zacharisen
33 years experience Allergy and Immunology
About 1 hour: The onset of action for zyrtec (cetirizine) to clinically improve symptoms is about 1 hour. The reference is listed here: http://www.Ncbi.Nlm.Nih. ... Read More
A 49-year-old member asked:
Dr. Richard Wasserman
44 years experience Allergy and Immunology
Zyrtec (cetirizine) use: Zyrtec (cetirizine) can be taken daily indefinitely, there are no long term side effects from accumulated drug.
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4 thanks
A male asked:
Dr. Al Hegab
Dr. Al Hegab answered
40 years experience Allergy and Immunology
Depends: on the condition, some would take it for years, but if you need it for long, better run it by tour doctor, best wishes
A 37-year-old male asked:
Dr. Bahman Omrani
17 years experience Pain Management
Zyrtec (cetirizine) : Zyrtec is a safe anti-histamine with a relatively good tract record in long term users. But note that all medications have side effects. However, some ... Read More
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A 38-year-old member asked:
Dr. Nayla Mumneh
29 years experience Allergy and Immunology
Allergies: Doubling your antihistamine may not be answer to treat your bad allergies, you should consult an allergist to manage your allergies better, you may ne ... Read More
A 2-year-old male asked:
Dr. Sathish Adigopula
20 years experience Pediatrics
.: You could possibly alternate but cetirazine is a better option than Diphenhydramine as there is less sedation. If you are looking for long term medica ... Read More
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A 36-year-old member asked:
Dr. Brian Bezack
18 years experience Pediatric Pulmonology
Possible side effect: Cetirizine is only recommended to be take once every 24 hours. Taking more than the recommended dose can be harmful in terms of increasing the chances ... Read More
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3 thanks

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