It appears that some people are engaging in what is now confirmed as the dangerous practice of mixing alcohol with energy drinks which is like mixing an upper and a downer. Alcohol makes one drowsy while energy drinks which has about three times the amount of caffeine as a strong cup of coffee makes one alert. The danger is when a person is that perky they may drink even more and even more disconcerting they may feel good enough to drive a car.
A young woman recently died of such a mixture. The blood alcohol level in her was sky high – way way above the normal average.