what would affect kidney function
Alcohol can cause changes in the function of the kidneys and make them less able to filter your blood. In addition to filtering blood, your kidneys do many other important jobs. One of these jobs is keeping the right amount of water in your body. Alcohol affects the ability of your kidneys to do this. When alcohol dehydrates (dries out) the body, the drying effect can affect the normal function of cells and organs, including the kidneys. Too much alcohol can also affect your blood pressure. People who drink too much are more likely to have high blood pressure.
1 Over time, uncontrolled high blood pressure can cause arteries around the kidneys to narrow, weaken or harden. These damaged arteries are not able to deliver enough blood to the kidney tissue.  Damaged kidney arteries do not filter blood well. Kidneys have small, finger-like nephrons that filter your blood.