NS can reduce some types of bacteria in certain body secretions, such as saliva. NS inhalations is used to produce sputum from the mouth to help improve lung function in people with cystic fibrosis, or to collect sputum for medical testing. This medication may also be used to dilute other medications inhaled through a nebulizer. It is indicated to Water and salt depletion in Diarrhea. Treatment of hypovolemic shock. Treatment of alkalosis with dehydration. In severe salt depletion or hyponatremia when rapid correction of sodium is necessary.