Sprite is not the best hangover cure. If you are unfortunate enough to have a bad hangover, the best way to get over it is to eat a little bit of eggs, drink some water, and get plenty of rest. Some tylenol will also help to make you feel better quicker.
Although some remedies, like coffee and aspirin, do help alleviate some of the symptoms of a hangover, there is no real remedy that works for everyone across the board. Depending on how much you drink and your body composition and health, what works for you, whether it is Sprite or an egg sandwich, may not be best for another individual.