Yes. From their FAQ:

Q: Why are sweeteners added to Pedialyte? Why not just add sugar to make it sweeter? Pedialyte contains the quantity and ratio of sugar (glucose) and minerals (electrolytes) recommended by the American Academy of Pediatrics. This precise balance of sugar and electrolytes makes Pedialyte effective in the management, treatment, and prevention of dehydration due to diarrhea with or without vomiting. Without added sweeteners, Pedialyte is not sweet enough for many children to drink. Adding sugar to Pedialyte may make diarrhea worse by drawing water into the intestine, increasing the risk of dehydration. Adding sweeteners makes Pedialyte taste good without the risks of adding sugar. When Pedialyte tastes good, children drink enough of it to maintain hydration and replace needed minerals when they have diarrhea and vomiting.

It's a product made to treat dehydration from diarrhea in children, so like they say, it's sweet so that it's not awful to drink. But it has a shit ton of electrolytes and other vital things lost from any form of dehydration, be it pooing yourself to death, or a long night of drinking.