HAGERSTOWN, Md. (AP) — The highly caffeinated Monster Energy Drink has been cited in five deaths and one non-fatal heart attack, according to reports that the U.S. Food and Drug Administration is investigating.

The reports claim that people had adverse reactions after they consumed Monster Energy Drink, which comes in 24-ounce cans and contains 240 milligrams of caffeine, or seven times the amount of the caffeine in a 12-ounce cola.