A Timaru youth worker is calling for legal highs to be banned.
Kirsty Henderson says she fears for the lives of young people who are buying highs, like K2 or Black Ops, in dairies, and using them without knowing what the ingredients are.
She says she's surprised some of the young people she's helping haven't died from using legal highs.
She says one girl stopped breathing, and a young man suffered a heart attack.
Ms Henderson says the problem is nationwide and highs should be made illegal.
A new bill to change legislation covering legal highs is before Parliament.
If passed, manufacturers will have to prove their products are low risk before they will be allowed to reach shop shelves.