The Prorhinel single-dose physiological serum is a sterile isotonic saline solution without preservatives, indicated for cleaning the nose in case of colds and moisturizing the nasal mucosa in case of dryness or irritation. How it works: Prorhinel physiological serum is recommended for gently cleaning the nasal cavities when the nose is blocked, for example, during a cold or in case of allergy, to evacuate excess mucus or allergenic particles such as dust or pollen. Can be used daily for baby's nose hygiene and care.