Piriton Syrup Piriton Syrup contains chlorphenamine maleate, an antihistamine that helps relieve the symptoms of hayfever & other allergies as well as itchy skin rashes, including chickenpox. They can treat the itchiness, redness, swelling, tenderness & irritation caused by: Hayfever & other allergies, e.g. pet, house dust mite & mould spore allergies. Skin allergies & dermatitis. Insect bites & stings. Nettle rash & hives. Prickly heat & heat rash. Allergic reactions to food, food additives or medicines. Piriton Syrup is ideal for children as it is easier to take than tablets & can be used in children from 1 year of age.