What is the active ingredient in Zyrtec?
Zyrtec
Medications
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Open May 11, 2026 - 09:06 AM
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May 11, 2026 - 09:06 AM
The active ingredient in Zyrtec is cetirizine hydrochloride, which is an antihistamine. Cetirizine hydrochloride works by blocking the effects of histamine, a substance in the body that causes allergy symptoms, providing effective symptom control for allergy sufferers.
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