Red Bull contains the following ingredients(250ml): - Caffeine - Taurine - B-group vitamins - Sugars - Alpine Water So 1 can of 250ml of red bull contains 77.4gm of caffeine and 26gm of sugar. The average caffeine content of an 250ml, brewed cup of coffee is 95 mg. A single espresso or espresso-based drink contains 63 mg, and decaf coffee contains about 3 mg of caffeine (on average). The caffeine and sugar content in Red Bull and other energy drinks are very high, and those contents on an empty stomach is likely to have caused you to fall ill. It is likely to have caused gastritis which resulted in the vomiting. I would advise you to be careful with consumption of energy drinks and kindly don't go overboard with it as it can cause complications over time. Cramming and going to an exam with lack of sleep can cause you to have difficulty to remember what you've studied by doing so.

Hello there. I can understand your concern. All this is happening due to your reckless behaviour. I can understand that you have exams but this is not the way to boost your performance. Here's a tip to boost your performance in exams, STUDY ALL THROUGH THE YEAR RATHER THAN LAST MOMENT STUDIES. Red bull contains a lot of caffeine which is a stimulant that is why you don't get sleep easily. You drank three cans, that kept you awake to which your body might not be used to. Also, that much caffeine irritates your gastric lining which is called the mucosa hence the vomiting and nausea. Your brain was also tired so added nausea there. My advice would be that you eat well, sleep well and study well so that you excel. Have lots of water, high protein diet and high fiber diet. Lots of fluid. One bowl of curd twice a day after foods and tab. Rantac 150 twice a day atleast half an hour before food for 2 days. That would be enough. All the best for your exams. Best regards. Dr. Anil Kumar Jain.

Hello... Red bull contain more caffeine than coffee itself .. It increases gastric secretion and irritates mucosa .. On the top of that you had sleepless night . nausea ,vomiting is expected in this condition. Stop having it. Do sleep for 7-8 hours .. Have curd rice for few days... Take antacids . everything settle down in 4-5 days .