A new government study is calling popular energy drinks "a rising public health problem" that is sending more and more people to the emergency rooms.

The study, from a survey of U.S. hospitals by the Substance Abuse and Mental Health Services Administration, said that the number of emergency-room visits linked to energy drinks had doubled in four years - from 10,000 in 2007 to 20,000 in 2011.

And of those 20,000 ER visits in 2011, 42 percent had mixed the energy drink with another stimulant such as Adderal or Ritalin or with alcohol. Fifty-eight percent had consumed just the drink.

Dr. Allen Taylor, chief of the cardiology division at Georgetown University Hospital, explained what could happen to some people when they consume an energy drink.............more at link..........