Get effective relief from allergy symptoms caused by hay fever and other upper respiratory allergies with Zyrtec Allergy Dissolve Tablets. This prescription-strength allergy medicine starts working hard at hour 1 and works twice as hard when you take it again the next day. From the 1 allergist-recommended brand among OTC oral antihistamines, this seasonal allergy medicine contains 10 milligrams of cetirizine hydrochloride in each tablet and helps treat symptoms caused by both indoor and outdoor allergies, including runny nose, sneezing, and itchy, watery eyes, nose and throat. Available in a tangy citrus flavor, one dose of Zyrtec allergy relief tablets provides effective relief for a full 24 hours and is suitable for those ages 6 and older.