The management of dehydration typically involves the use of oral rehydration solution (ORS). Standard home solutions such as salted rice water, salted yogurt drinks, vegetable and chicken soups with salt can be given. Home solutions such as water in which cereal has been cooked, unsalted soup, green coconut water, weak tea (unsweetened), and unsweetened fresh fruit juices can have from half a teaspoon to full teaspoon of salt (from one-and-a-half to three grams) added per liter. Clean plain water can also be one of several fluids given. There are commercial solutions such as Pedialyte, and relief agencies such as UNICEF widely distribute packets of salts and sugar. The World Health Organization (WHO) describes a homemade ORS with one liter water with one teaspoon salt (or 3 grams) and six teaspoons sugar (or 18 grams) added (approximately the “taste of tears”). The WHO; however, does not generally recommend homemade solutions as how to make them is easily forgotten. Rehydration Project recommends adding the same amount of sugar but only one-half a teaspoon of salt, stating that this more dilute approach is less risky with very little loss of effectiveness. Both agree that drinks with too much sugar or salt can make dehydration worse.
In what the World Health Organization (WHO) terms "some dehydration," the child or adult is restless and irritable, is thirsty, and will drink eagerly.
WHO recommends that if there is vomiting, don’t stop, but do pause for 5–10 minutes and then restart at a slower pace. (Vomiting seldom prevents successful rehydration since most of the fluid is still absorbed. Plus, vomiting usually stops after the first one to four hours of rehydration.) With the older WHO solution, also give some clean water during rehydration. With the newer reduced-osmolarity, more dilute solution, this is not necessary.
Begin to offer food after the initial four-hour rehydration period with children and adults. With infants, continue to breastfeed even during rehydration as long as the infant will breastfeed. Begin zinc supplementation after initial four-hour rehydration to reduce severity and duration of episode. If available, zinc supplementation should be continued for 10 to 14 days. During the initial period of rehydration, the patient should be re-assessed at least every four hours.
The family should be provided with at least two days worth of ORS packets. WHO recommends, in addition to infants continued to be breastfed, that children older than six months be given some food before being sent home, which helps to emphasize to parents the importance of continuing to feed the child during diarrhea.