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REACTINE® Extra Strength

10 mg Cetirizine HCl/tablet • Fast, 24-hour allergy symptom relief • Small, easy-to-swallow tablet

A sick South Asian woman sitting with a napkin close to her nose from allergy.

Understanding Allergy Symptoms

Allergies kick in when your immune system overreacts to normally harmless substances called allergens. Your body releases many chemicals, one of which is called histamine. Histamine is the most abundantly released chemical and is responsible for causing most of your symptoms.