t dehydration. Dehydration can make your sick child feel even worse. Use pedialyte rather than juices, soda, sports drinksorwater, at the first sign of diarrhea and vomiting to help replace lost fluid and electrolytes. Pedialyte is scientifically designed to help replace electrolytes, like sodium, lost during diarrhea more effectively than common beverages. Also available in unflavored, grape, strawberry, and bubblegum flavors.