Nasal powder spray to protect against allergies. Nasaleze is an inert cellulose powder that delivers fast, effective protection against hay fever, dust mites & animal dander by means of a novel, patented method that ensures delivery of an effective dose via the nasal cavity. Clinical data has shown that by acting as a barrier to airborne allergens, Nasaleze stops the cause of allergies that are inhaled through the nose rather than just treating the symptoms. Each bottle contains the equivalent of 200 sprays.