Pirinase Hayfever 0.05% Nasal Spray is designed to be taken as a one-a-day treatment for hay fever and other allergies. Suitable for adults the spray acts at the point of the symptoms to provide targeted relief and will also help to prevent symptoms from recurring during the day. As well as hay fever (caused by pollen allergy) Pirinase will help to relieve symptoms of other airborne allergens such as mould spots pet hair and dust mites. It also helps to relieve nasal congestion. Pirinase Hayfever 0.05% Nasal Spray will help to relieve the symptoms of allergies for up to 24 hours.