Having something sweet to suck can often help quite a bit when suffering from Travel Sickness. It helps to relieve dry mouth and gives the digestive system something to do when you can't face anything else, and the sugar can provide a much needed energy boost.
Barley Sugars are fine, but Queasy Drops and Queasy Pops are particulary good as they're specially formulated to help combat queasiness. They can also help with the nausea experienced during chemotherapy.
When the Queasies just won't stop - try a Queasy Pop or Drop!