Zyrtec Allergy Tablets relieves your worst allergy symptoms, indoor and out. With 10 mg of cetirizine hydrochloride per tablet, this prescription-strength allergy relief medicine provides 24 hours of relief from common symptoms of hay fever and other upper respiratory allergies, including runny nose; sneezing; itchy, watery eyes; and itching of the nose or throat. From an allergist-recommended brand among OTC oral antihistamines, these all-day anti-allergy tablets effectively treat indoor allergies caused by dust, mold and pet dander as well as outdoor seasonal allergies from tree pollen, weeds and grasses. This 24-hour, allergy relief medicine starts working at hour 1 and works twice as hard when you take it again the next day. It is suitable for those ages 6 and older.Zyrtec Allergy Tablets relieves your worst allergy symptoms, indoor and out. With 10 mg of cetirizine hydrochloride per tablet, this prescription-strength allergy relief medicine provides 24 hours of relief from common symptoms of hay fever and other upper respiratory allergies, including runny nose; sneezing; itchy, watery eyes; and itching of the nose or throat. From an allergist-recommended brand among OTC oral antihistamines, these all-day anti-allergy tablets effectively treat indoor allergies caused by dust, mold and pet dander as well as outdoor seasonal allergies from tree pollen, weeds and grasses. This 24-hour, allergy relief medicine starts working at hour 1 and works twice as hard when you take it again the next day. It is suitable for those ages 6 and older.