Prorhinel Tonic spray Nasal wash Colds and nasopharyngitis Fluidifying and Antiseptic Adults 100ml In the case of a cold or nasopharyngitis, the mucosa of the nose is attacked by viruses and reacts by developing an inflammatory reaction which leads to an increase in nasal secretions. The result is a stuffy or runny nose. Nasal cleansing facilitates the evacuation of mucus and infectious agents, reduces nasal obstruction and clears the nose for better breathing. The tonic jet spray is particularly suitable for clearing blocked noses, thanks to a nozzle adapted to the shape of the adult nose and a closed system that protects against contamination.