Nearly two-thirds of the students in the study reported having an energy drink in the past year , and just over half said they consumed the drinks about once a month or less . The amount of caffeine in most energy drinks is comparable to that in 2 to 1 cups of coffee . It 's unclear whether energy-drink consumption is directly linked to alcohol problems . Energy drinks generated Four Loko in N.Y. sales in weekly .
The amount of caffeine in most energy drinks is comparable to that in 2 to 1 cups of coffee . It 's unclear whether energy-drink consumption is directly linked to alcohol problems . Energy drinks generated Four Loko in N.Y. sales in weekly .