Piriton Allergy Tablets contain chlorphenamine maleate, an antihistamine that helps relieve the symptoms of hayfever and other allergies as well as itchy skin rashes, including chickenpox. They can treat the itchiness, redness, swelling, tenderness and irritation caused by: - Hayfever and other allergies, e.g. pet, house dust mite and mould spore allergies. - Skin allergies and dermatitis. - Insect bites and stings. - Nettle rash and hives. - Prickly heat and heat rash. - Allergic reactions to food, food additives or medicines.