Investigators are expected to find out today exactly what drug, or ingredients caused up to 16 people to be hospitalised on the Gold Coast over the weekend.
Victorian footballer Riki Stephens remains in hospital since taking the mystery drug, while 14 of the other people were allowed to go home.
CCC executive director Kathleen Florian says those who took the drug described their experience as frightening, causing erratic and violent behaviour.
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Police are warning people ahead of the Gold Coast 600 and Schoolies to not experiment with any drug.