Get 24-hour relief from allergy symptoms caused by ragweed, tree pollen, dust mites, pet dander, hay fever, and other upper respiratory allergies with Zyrtec Allergy Relief Medicine Tablets. Each tablet contains 10 milligrams of the antihistamine cetirizine hydrochloride, providing prescription-strength relief from common symptoms like a runny nose, sneezing, itchy, watery eyes, and an itchy nose or throat. From the #1 allergist-recommended brand among over-the-counter oral antihistamines, these all-day anti-allergy tablets effectively treat indoor allergies caused by dust, mold, pet dander, and outdoor seasonal allergies from tree pollen, weeds, and grasses. Zyrtec anti-allergy tablets work fast, starting within the first hour, and provide 24-hour relief for your indoor and outdoor allergies. They work twice as hard when you retake them the next day and are suitable for those ages six and older.