Objective: To compare the efficacy of a reduced osmolarity oral rehydration salts (ORS) solution (75 mmol / L of sodium (Na), 20 mmol / L of potassium (K), 65 mmol / L of chloride, 10 mmol / L of citrate, and 75 mmol / L of glucose; osmolarity, 245 mosm / L) with that of the standard World Health Organization (WHO) ORS solution (311 mosm/L).