A teenager in the US died as a result of drinking a number of highly - caffeinated beverages too quickly , according to a coroner in South Africa . Davis Allen Cripe , who was aged 16 , collapsed after drinking a McDonald 's coffee , a Mountain Dew and an energy drink , which may have contained up to 470 milligrams of caffeine in under two hours . He , who had no prior medical condition , died from a " caffeine - induced cardiac event causing a probable arrhythmia " . Davis may have consumed about 470mg of caffeine in just under two hours, based on statistics from the website caffeineinformer.com. The death was not the result of a caffeine overdose , but rather of the fact that the caffeine was ingested so quickly , the police stated .
A teenager in the US died as a result of drinking a number of highly - caffeinated beverages too quickly , according to a coroner in South Africa . Davis Allen Cripe , who was aged 16 , collapsed after drinking a McDonald 's coffee , a Mountain Dew and an energy drink , which may have contained up to 470 milligrams of caffeine in under two hours . He , who had no prior medical condition , died from a " caffeine - induced cardiac event causing a probable arrhythmia " . The death was not the result of a caffeine overdose , but rather of the fact that the caffeine was ingested so quickly , the police stated .