Nasomist-plus is composed of isotonic buffered solution sodium chloride. Nasomist-plus is used to treat dryness inside the nose (nasal passages). It helps add moisture inside the nose to dissolve and soften thick or crusty mucus. In babies and young children with stuffy noses who cannot blow their noses, using nasomist-plus helps to make the mucus easier to remove with a nasal bulb syringe.