An oral rehydrating solution (ORS) is a "specially constituted fluid containing as essential ingredients an organic solute (e.g. a carbohydrate or amino acid) and sodium chloride. Such organic solutes are subject to active intestinal co-transport (absorption) with sodium and so enhance salt and hence water absorption. Most ORS solutions contain glucose as the organic solute." (NICE, 2009)
Oral rehydration solutions are recommended as first line treatment for acute gastroenteritis to counteract fluid losses and for rehydration purposes (Guarino et al., 2018).