TARTAR CONTROL LISTERINE ANTISEPTIC MOUTHWASH is a daily mouthwash with clinically-proven effectiveness. Used in addition to brushing, its zinc chloride formula reduces the formation of calculus to prevent tartar build-up. Warnings and Precautions : Keep out of reach of children . Do not administer to children . Do not swallow . If large quantities are swallowed, contact a doctor. Do not use if sensitive to any of the ingredients.