Will there be any health problems if a 13 year old drinks a can of monster?

Just don't do it.: Monster and Red Bull drinks contain caffeine and additives, which mainly enhance the effect of caffeine. They can lead to dehydration, insomnia, jitteriness, anxiety, nausea, vomiting and in extreme cases seizures. One can can cause rapid heart rate and palpitations. It can also open the pathway to addiction, as many teens seek the "buzz" they feel after one or two cans. Best not to even try one.