Normal saline

0. 9% sodium chloride. It is isotonic. It contains only sodium and chloride. Sodium chloride is used when blood sodium is decreased; such as in Addison?s disease because it has a higher concentration of sodium than does lactated Ringer?s. It may be used in lieu of lactated Ringer?s for rehydration in patients with lymphoma. It is used as a rehydration solution when a patient has an increased potassium or calcium, and the administration of additional calcium or potassium are contraindicated.