Children under age 1 should not be given Pedialyte without a doctor's recommendation, advises the Pedialyte website. Children age 1 and older require an 8-ounce serving of Pedialyte every 1 to 4 hours as needed, resulting in a total daily amount of 32 to 64 ounces in a 24-hour period.
Pedialyte advises parents to consult a physician about diarrhea and vomiting in infants under age 1 because they are at greater risk of dehydration than older children.
For older children, continuing to provide a child with Pedialyte after 24 hours of use is not advisable. The Pedialyte website stresses the importance of consulting a physician following 24 hours of diarrhea. Parents should contact a physician if vomiting or fever occur as well.