It reduces how much ADH you make, so it increases how much urine you produce. Each shot of alcohol that you drink forces your kidneys to generate an extra 120 millilitres of urine on top of the normal 60–80 millilitres per hour. Your body has detectors that can sense both the saltiness of your water, and the volume of the water. If these detectors reckon that you are dehydrated, they send a...