Why is my mouth dry after hot chocolate and root beer, both big cups from the gas station - I feel parched?

Answer 1

Then drink water? 

Answer 2

Because your body wants water

Answer 3

When you consume sweet foods, sugar enters the bloodstream and begins to circulate through the body. These sugar particles suck the water from your body's cells, depleting supplies. Your body's cells then send chemical messages to the brain indicating that it's time to drink fluids.