There's growing support for a call to decriminalise drugs in order to reduce harm.

The Drug Foundation's released a report calling drug laws of the past 50 years a 'colossal failure'. 

It is pushing for decriminalising use - and more investment in health and addiction services. 

Victoria University criminology professor Fiona Hutton says the status quo isn't working. 

"Things like drug overdoses are rising, addiction hasn't really been properly addressed, things like methamphetamine use are causing real harm in our communities."

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