Yes, alcohol can dehydrate you.
Dehydration occurs when the body does not have sufficient amounts of fluid to function effectively. This can cause symptoms such as headache, dizziness, and fatigue. Alcohol has a dehydrating effect on the body, especially when a person consumes it in large quantities.
Diuretics are a type of medication that increases the amount of water and salt that is expelled from the body in urine. Medical professionals use these medications to treat a range of conditions, including high blood pressure and congestive heart failure.
Alcohol causes your body to remove fluids from your blood through your renal system, which includes the kidneys, ureters, and bladder, at a much quicker rate than other liquids.
If you don’t drink enough water with alcohol, you can become dehydrated quickly.