It is not recommended to drink coffee after drinking alcohol, drinking coffee immediately after drinking alcohol will cause the following adverse reactions: 1, drinking coffee after drinking alcohol will quickly excite the nerve center, alcohol is a product that excites the nerve center, the ethanol in alcohol will expand the body’s capillaries, leading to overexcitation of the body’s nerve center, caffeine in coffee also has the effect of excitement of the nerve center, so drinking coffee after drinking alcohol will lead to 2, drinking coffee after drinking alcohol will cause a large amount of gastric acid reflux, which will lead to an increased incidence of alcoholic celiac disease gastritis, and patients with previous gastric disease will also have upper gastrointestinal bleeding. Therefore, after drinking alcohol can not drink coffee.