Natrum muriaticum is the homeopathic remedy commonly known as table salt or sodium chloride. Salt is the second most common substance in nature, water being the first. Salt is an important component in regulating the balance of body fluids. Salt is a constituent in both body fluids and tissues. Excessive salt intake inhibits proper absorption of nutrients and weakens the nervous system, while a lack of salt creates a lack of fluid, resulting in an emaciated and withered appearance.

Salt was not extensively used for medicinal purposes until the time of Samuel Hahnemann, the father of homeopathy . While ancient physicians did employ salt in the treatment of liver enlargement and other swellings, salt had little medicinal value until Hahnemann's studies of the remedy in the early nineteenth century.

Natrum muriaticum is a slow acting remedy that responds well to chronic ailments. It is seldom prescribed for acute conditions, and then only when symptoms specific to the remedy are present. This polychrest is a very powerful and deep acting remedy and makes long lasting changes, often continuing to bring about results for several years.