Zyrtec is a highly effective antihistamine medication containing 10 mg of Cetirizine, its active ingredient. It provides relief from various allergy symptoms such as sneezing, runny nose, and itchy or watery eyes commonly associated with colds or allergic reactions. Trusted by reputable manufacturers, Zyrtec is marketed under diverse brand names, including Cetiriz, Alleroff, and Aller-Tec, making it a reliable choice for treating both seasonal and perennial allergies worldwide.