Enjoy fast, long-lasting relief from a variety of seasonal and year-round allergy symptoms with Reactine Allergy Liquid medicine. Designed to work for 24 hours, this antihistamine liquid made with Cetirizine Hydrochloride relieves the following symptoms: sneezing, runny nose, stuffiness, itchy nose & throat, itchy eyes, watery eyes, allergic skin itch, and hives.