I use it from 2021. It works well
Lea S.
Nasal spray designed to moisturise and care for the mucosa from external factors. Helps protect the internal cavity of the nose from impurities and allergens, with a 5-hour action. Formulated with hypromellose, citric acid, sodium citrate, benzalkonium chloride and menthol. Includes patented technology, which acts by creating a hostile environment for 97% of airborne viruses. It comes in a practical container with an applicator and a non-return valve, which allows preserving the sterility of the product.