Trends in gamma-hydroxybutyrate-related harms based on ambulance attendances from 2012 to 2018 in Victoria, Australia.

There has been a 147% increase in the prevalence of GHB-related ambulance attendances in Victoria, Australia between 2012 and 2019, largely attributable to a growth in the proportions of people using gamma-hydroxybutyrate alone or concurrently with methamphetamine.