Drinking alcohol and coffee together can exacerbate the damage alcohol does to the human body. This is because alcohol can damage all the cells in the human body. After drinking, alcohol is quickly absorbed by the digestive system and enters the circulatory system, which in turn affects the functions of organs such as the gastrointestinal tract, heart, liver, kidneys, brain, and endocrine system, causing disorders in the body's material metabolism. The brain is the most severely affected organ because it can cause the cerebral cortex to be in a state of over-excitement or paralysis. The main component of coffee is caffeine. Moderate consumption has stimulating, refreshing, and stomach-strengthening effects, but excessive consumption can lead to poisoning. For people who drink coffee for a long time, once they stop, it can cause a high degree of inhibition in the brain, leading to symptoms such as a drop in blood pressure and severe headaches. In some cases, it can even lead to mental abnormalities, such as mood swings, mania, and depression.