By Daniel Walker of Newstalk ZB
Warnings about sinister substances being added to drugs in New Zealand have come as the summer festival season is about to begin.
For the past few years, KnowYourStuff NZ has been heading to concerts, where their volunteers examine drug samples so people can find out what's really in such substances.
Director Wendy Allison said they have discovered that some drugs in New Zealand are laced with potentially deadly substances.
"The thing that we found last year that was of most concern was cathinones. The street names for them is bath salts but we actually found a new one that has been causing trouble overseas, we found that at every event."