a composition provides an isotonic nasal irrigation solution with ph less than about 7 . 0 . the composition may be formed of a salt and a ph buffer and may include an additive . the composition may be mixed with water to form the solution . the composition may aid in the treatment of various nasal or sinus disorders such as , for example , dryness , rhinitis , and sinusitis . the isotonic irrigation solution may also aid in the removal of contaminants from the sinus and nasal cavities such as blood , mucus , dirt , pollen , allergens , viruses , and bacterial . the composition may be liquid or dry .