Too much caffeine caused the death of a 16-year-old high school student from US' South Carolina state who collapsed during class last month, according to a county coroner.
Davis Allen Cripe died from a caffeine-induced cardiac event causing a probable arrhythmia, Richland county coroner Gary Watts announced in a news conference on Monday.
During an arrhythmia, or abnormal heart rhythm, the heart may not be able to pump enough blood to the body, and lack of blood flow affects the brain, heart and other organs, reports CNN.
The teenager consumed three caffeine-laced drinks -- a cafe latte purchased from McDonald's, large Diet Mountain Dew and an energy drink -- in a two-hour period before collapsing in his classroom at Spring Hill High School on April 26, Watts said.
He collapsed just before 2.30 p.m. and according to Watts, was pronounced dead at 3.40 p.m.
The autopsy showed no undiagnosed heart conditions and that he was healthy and had no conditions that could have triggered by the caffeine intake. Also, no other drugs or alcohol were found in the teen's system, Watts said.
"This was not an overdose. We lost Davis from a totally legal substance, " Watts said, adding "Our purpose here today is to let people know, especially our young kids in school, that these drinks can be dangerous, and be very careful with how you use them."
The American Academy of Pediatrics recommends that adolescents, age 12 to 18, should not consume more than 100 milligrams of caffeine per day, CNN reported.
A 2014 study found an estimated 73 per cent of children across the US consume some kind of caffeine each day.
according to the US Food and Drug Administration adults can consume 400 milligrams of caffeine per day -- equivalent to four or five cups of coffee -- without experiencing side effects.
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