Question: what happens if you drink more than one red bull?
Answer: Therefore, drinking more than one 8.4-ounce (260-ml) serving of Red Bull could increase the risk of caffeine overdose in this age group ( 28 ). Symptoms of caffeine overdose and toxicity can include nausea, vomiting, hallucinations, anxiety, rapid heart rate, dizziness, trouble sleeping, and seizures ( 31 ).