Zirtek - Allergy Relief 10mg Cetrizine Tablets (30). Cetirizine dihydrochloride is the active ingredient of Zirtek Allergy Relief. Zirtek Allergy Relief is an antiallergic medication.. In adults and children aged 6 years and above, Zirtek Allergy Relief is indicated:. for the relief of nasal and ocular symptoms of seasonal and perennial allergic rhinitis.. for the relief of urticaria.
