acetaldehyde would like a word...

The Chemical Breakdown of Alcohol

Alcohol is metabolized by several processes or pathways. The most common of these pathways involves two enzymes—alcohol dehydrogenase (ADH) and aldehyde dehydrogenase (ALDH). These enzymes help break apart the alcohol molecule, making it possible to eliminate it from the body. First, ADH metabolizes alcohol to acetaldehyde, a highly toxic substance and known carcinogen.Then, acetaldehyde is further metabolized down to another, less active byproduct called acetate, which then is broken down into water and carbon dioxide for easy elimination

https://health.howstuffworks.com/wellness/drugs-alcohol/hangover4.htm

if you want to avoid the hangover take some L-Cysteine before you drink

I ate a bunch of food, drank a ton of water and used the bathroom like 10 times. I used to be a more hardcore alcoholic. I think my body just can't handle as much booze anymore.