The Drug Foundation says the country barely invests anything into helping and supporting people with meth-addiction.  

Discharges from public hospitals suggest meth-use has increased four-fold over the past decade. 

Wastewater testing last year showed a doubling in meth use.  

Drug Foundation Chief Executive Sarah Helm told Mike Hosking a lot more could be done, especially with knowledge from new research.  

She says about half of people using illicit substances have ADHD, which could help prevent drug-use if treated. 

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