Numark Cetirizine Hayfever Relief Tablets are used to treat the symptoms of hayfever (itchy or watery eyes, sneezing and a runny nose) and other allergies e.g. pet, house dust mite and mould spore allergies. They can also be used to relieve the rashes and itching of hives. The active ingredient is cetirizine hydrochloride, an antihistamine which can help to relieve the symptoms of some allergies and itchy skin rashes. Numark Hayfever Relief Tablets offer 24 hour max strength allergy relief for adults and children 6+ years.