The active ingredient in your tablets is cetirizine hydrochloride, which belongs to a group of medicines called antihistamines. These are used to relieve the symptoms the following: - Seasonal allergic rhinitis (e.g. hayfever) - Perennial allergic rhinitis (e.g. year round allergies often due to house dust mites or animal allergies) - Urticaria (itchy, red, swollen skin). These symptoms include itchy skin rashes; sneezing; itchy, runny or blocked nose; red, itchy and watering eyes. .