Zirtec Plus Decongestant (cetirizine) is used to relieve symptoms of allergies such as blocked nose, sneezing, runny nose, itchy nose or itchy eyes, which occur in seasonal allergy rhinitis (hay fever) or dust mites (perennial allergic rhinitis). You Must Be Aged Over 18 Years to Purchase This Product. MAXIMUM order quantity of THREE packs per order. Do not take with any other pseudoephedrine products.