Zyrtec is an antihistamine medication containing 10 mg of Cetirizine dihydrochloride per tablet. This pack contains 20 film-coated tablets manufactured by GSK for the treatment of allergy symptoms. Zyrtec (Cetirizine dihydrochloride) is a second-generation antihistamine used to relieve allergy symptoms such as sneezing, runny nose, itchy eyes, and skin reactions. The film coating makes the tablets easier to swallow. Each tablet contains 10 mg of the active ingredient and the pack includes 20 tablets.