It is recommended in cases of mucus accumulation that requires fluidization such as: persistent common cold, allergic rhinitis, sinusitis. Product without preservatives. Opti-Ionoc Marine Solution is a slightly hypertonic solution (higher salt concentration than blood plasma). The osmotic effect drains excess water retained in the nasal passages, helping to thin mucus and produce a decongestant effect without irritation. It allows water to pass from a less concentrated solution to a more concentrated solution, causing water to flow out into the nasal passages. It helps thin mucus, producing a decongestant effect without irritation. Fluid+ also contains Polysorbate 80, a mild surfactant, which helps loosen mucus from the mucosa. Recommended use in adults and children from 12 years old. Spray 1 or 2 times in each nostril, 2 or 3 times a day while congestion lasts.