Keep an eye on the fever, but remember that's the body's way of fighting infection. You just don't want it to get too high. Ginger has long been known to be an anti-nausea remedy, so ginger ale can be easier to keep down than other liquids. You might even try some ginger tea (the tannic acid in tea also has anti-nausea properties). Just add a half teaspoon of powdered ginger to a cup of tea sweetened to taste, works wonders.