Australia

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This March, a survey of drugs detected in Australian wastewater sparked familiar headlines: "meth up, alcohol down", "heroin's a big hit".

The annual study by the Australian Criminal Intelligence Commission (ACIC) ignites fresh debate among commentators every year, but according to its own principal advisor on drugs, Shane Neilson, it's not a perfect picture of what's happening in the illicit market.

GHB is a clear, flavourless liquid that induces euphoria and relaxation in small doses, earning a subculture of users among the rave and chemsex communities.

Perhaps unsurprisingly, attendees at a Victorian music festival early this year were well aware of the threat posed by GHB overdoses, repeating one word for the symptoms that can follow:

"I used to work in King St in Melbourne and you see people blowing out every weekend," he told Hack, referring to a night club area in the CBD.

The effort worked: Dr Caldicott and other experts agreed that GHB overdoses fell in the late 2000s as understanding of its risks grew in the community.

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