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May 11, 2026 - 09:07 AM
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We’ve provided several answers to questions related to Zyrtec , see some other helpful Q&A related to this product.
Question: Can I buy antihistamines over-the-counter in Canada?
Answer: Yes, you can buy many types of antihistamines over-the-counter in Canada. Common options like loratadine (Claritin), cetirizine (Reactine), and diphenhydramine (Benadryl) are available without a prescription at most pharmacies. However, some stronger antihistamines may still require a prescription.
Question: What is the active ingredient in Zyrtec?
Answer: 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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