The Food and Drug Administration is investigating reports that a popular energy drink may be associated with five deaths.
Monster Beverage Corp makes the energy drink of the same name.
The family of a 14-year-old Maryland girl is suing the company because she died after drinking two cans in a 24-hour period.
The girl had a pre-existing heart condition. The suit says she died of "cardiac arrhythmia due to caffeine toxicity" and that the company failed to warn consumers about the dangers of the drink.
According to Fox News, the two drinks contained about 480 milligrams of caffeine, the equivalent of 14 12-ounce cans of coke.
"The blood pressure might go up to dangerous levels. It's also possible that the heart rhythm could rise excessively," Dr. Richard Wright, a cardiologist, said. "It's a little bit why people feel jittery when they drink too much coffee or Coca-Cola."
In a statement, the company said: "Monster is unaware of any fatality anywhere that has been caused by its drinks."
The lawyer for the family behind the lawsuit said they hope their case will keep this tragedy from happening to anyone else.
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