Australia experts call for energy drink warnings

Researchers in Australia on Monday called for health warnings on caffeine-loaded energy drinks following a spike in the number of people reporting medical problems after drinking them.

Health professionals from the University of Sydney's Medical School and the New South Wales Poisons Information Centre said reports of to drinks like Red Bull and V jumped from just 12 in 2004 to 65 in 2010.

Over the seven years to 2010, 297 calls for assistance were recorded with at least 128 people hospitalised with symptoms including , agitation and stomach upsets.

Of these, 20 people had more serious issues, such as seizures and hallucinations.

The study, published in the Medical Journal of Australia, said the average person affected was 17 years old and that they often mixed with alcohol.

"Our study demonstrates the extent of the growing problem in Australia with energy drink consumption and toxicity, particularly among adolescents," the study's authors wrote.

"Given the clear evidence of toxicity and the growing number of hospitalisations associated with consumption of energy drinks... authorities should increase awareness of the problem, improve package labelling and regulate caffeine content."

They recommended that "labelling and any marketing of these products should include appropriate and the national poisons hotline number". A can of energy drink may contain up to 300 milligrams of caffeine -- compared to an average 65-120mg for a cup of drip coffee -- and Poisons Centre medical director Naren Gunja called for more thorough regulation.

"Things to look at would be... how much caffeine do these drinks contain, how many can you buy at once, what age should you be when you buy them, should there be an age limit to being sold the drinks," he said.

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