Zyrtec is an antiallergic medicine. In adults and children from 6 years of age, Zyrtec 10 mg film-coated tablets are indicated: – for the relief of nasal and eye symptoms of seasonal or aperiodic allergic rhinitis. – for the relief of urticaria.Always take this medicine exactly as described in this leaflet or as your doctor or pharmacist has told you. Check with your doctor or pharmacist if in doubt.