What's the reaction between beer and coffee?

Don't drink coffee and wine together. Because caffeine in coffee can stimulate the central nervous system and muscles, it can speed up metabolism. Alcohol in wine also has a strong exciting effect. After drinking coffee, the brain will be extremely excited, which can not only stimulate blood expansion, but also accelerate blood circulation, greatly increasing the burden on the cardiovascular system, which is very harmful to the human body and the stomach. So after drinking coffee, try to avoid drinking again.