On the basis of not being allergic to coffee or Red Bull, the two can be drunk together, but it should be noted that both coffee and Red Bull contain a certain amount of caffeine, which should be consumed in moderation to avoid excessive caffeine intake on the body. Coffee and Red Bull are common beverages in life, usually, as long as the two are not allergic to, there is no conflicting components between coffee and Red Bull, can be consumed together, there will be no adverse effects on the body. It should be noted that both coffee and Red Bull contain a certain amount of caffeine and should be consumed in moderation. If you consume too much caffeine at one time, it may stimulate the central nervous system of the brain, affecting sleep, while excessive caffeine will also stimulate the stomach, which may cause stomach pain and other discomforts. Therefore, if you choose to drink coffee and Red Bull at the same time, you should pay attention to control the overall intake, or you can choose one of the two.