Relieve your child's allergy symptoms all day long with Zyrtec 24 Hour Children's Allergy Grape Chewable Tablets. Suitable for children 6 and older. Each chewable allergy relief tablet contains 10 milligrams of the effective antihistamine cetirizine HCl to relieve common allergy symptoms including runny nose, sneezing, itchy and watery eyes, and itchy nose and throat.