Jan 16, 2013 1:54 PM by NBC News
A new government survey reveals ER visits linked to energy drinks are on the rise.
Researchers say the number of people needing medical attention after consuming energy drinks doubled between 2007 and 2011.
That's the same time span these drinks became more popular in convenience stores, bars and college campuses.
Most of the 20,000 cases involved teens or young adults.
While the survey doesn't list the symptoms that brought patients to the ER, the drinks are known to cause insomnia, nervousness, headache, fast heartbeat, and even seizures.
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