Banning headshop drugs appears to have worked.
Doctors say they are treating less than half of the amount of people for psychoactive overdoses since the drugs were outlawed and headshops closed.
Research shows that average treatment rates for new psychoactive substances fell by over 50% in the two years after the drugs were added by the government to the list of banned substances in 2010.
Before then there was a major increase in the number of headshops, peaking at over 100 stores.
122 young adults were treated for psychoactive substance abuse in 2010, but just two years later in 2012 the number had dropped to a low of 38.
Medical experts are hailing the drop as significant.