A Sydney teen with a previously undetected — and fairly common — heart condition was rushed to hospital on two separate occasions after drinking Red Bull.

Her story is one of many sent in by ninemsn readers who have had serious health problems after consuming energy drinks, which are currently sold in Australia without labels carrying clear health warnings.

Alicia Franklin was first hospitalised after an incident a few months short of her 18th birthday, when she was at a party, looking after an intoxicated friend.