Zyrtec Allergy Relief Medicine Tablets relieve your worst indoor and outdoor allergy symptoms, including those from seasonal allergies, pet allergies, and more. 10 milligrams of cetirizine hydrochloride per antihistamine 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 the #1 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. For fast and effective allergy symptom relief, this 24 hour allergy relief medicine starts working at hour 1 and works twice as hard when you take it again the next day. Suitable for ages 6 and up, Zyrtec Tablets offers lasting relief from your worst allergy symptoms.