Sodium Chloride is also known as common table salt; in mineral form it's known as halite. It is found in many foods (naturally and added), plants and our ocean waters. As far back as our history shows, people have used salt as a food preservative, a flavor enhancer or condiment, and a cleansing agent rubbed on household surfaces. It is also used in many brands of shampoo, toothpaste, and household cleaners. We can use it to de-ice roads, driveways and walkways, and kill slugs. It is used as a water softener. Sodium chloride is also used as a disinfectant to kill germs in first aid (which why it makes such a good cleaning agent).
In normal quantities, salt does not harm humans, in fact sodium chloride is essential to health. However in large doses there can be chronic side effects. Patients sensitive to the sodium component of salt may develop high blood pressure if exposed to excess amounts of sodium from the diet. Excess intake of sodium chloride may trigger the increase in the excretion of calcium through the urine leading to osteoporosis or kidney stones.
Acute symptoms, due to ingesting extremely high doses of sodium chloride, include swollen tongue, nausea, vomiting, diarrhea, cramps and thirst. Also, in high concentration, may cause stinging sensation in eyes or nasal passages.