Hangover
Drinking alcohol suppresses your body’s antidiuretic hormone (ADH), which is an important part of your body’s ability to reabsorb fluid. At the same time, alcohol itself acts as a diuretic, pulling fluid along with it as it is excreted.
This is the main reason that your mouth feels dry after a night of drinking. Several nutrients are also needed to protect you from other irritating symptoms such as headaches and nausea. IV hydration is known as one of the best methods of relieving these symptoms quickly.