ZYRTEC Liquid Gels each contain 10 mg cetirizine HCl to provide 24-hour relief from seasonal and other upper respiratory allergy symptoms, including runny nose, sneezing, itchy eyes and more. Suitable for adults and children ages 6 and up, these allergy relief gel capsules help treat symptoms caused by pollen allergies & other outdoor seasonal allergies, as well as indoor allergies such as dust, mold, and pet allergies. From the #1 allergist recommended brand among OTC oral antihistamines, this prescription-strength allergy medicine starts working hard at hour 1, and works twice as hard when you take it again the next day.