Diarrheal illness and dehydration are common during travel. Oral Rehydration Salts control the effects of stomach illness so that you can spend the rest of your trip enjoying your destination, rather than in a hospital bed. World Health Organization formula for maximum fluid replacement. Features Formulated specifically to help your body replace fluids lost during illness. Scientifcally proven mixture of potassium, salt, and carbohydrates enhances the ability of the intestines to absorb and retain fluids.