Associate Health minister Peter Dunne said the sale of synthetic cannabis products would become more restricted than cigarettes.
It was unlikely local dairies would continue to sell it, he told the Otago Daily Times yesterday.
"I am not criticising local dairies, because they sell a product that is legal to sell. Whether it should be sold is another question... and that is what we are addressing."
Next week Mr Dunne would spearhead in Parliament "strong" amendments to the Misuse of Drug Act.
While tightlipped over those changes, products such as Kronic "had exploded in terms of their popularity and their promotion, and the amendments will address that".
Changes would likely curtail the sale of products. He was loath to reveal further details because he was yet to get final clearance from Cabinet, and he did not want to alert an industry of which he was "deeply suspicious".
However, he confirmed the proposed amendments would not include fines or penalties, and did not think they would drive the product underground.
The changes were also likely to make distributors think twice about importing the product.
Mr Dunne said the industry was possibly planning its next legal high, and he had discussed the problem with counterparts from Britain, Germany, Canada and Australia.
"The view is there are other products in the pipeline."
Law changes next week would act as an interim measure, while in the longer term Government would adopt the recommendations from the Law Commission and shift the onus of responsibility on the supplier.
An outpouring of "public angst" over synthetic cannabis prompted the amendments.
"What I am planning will see the public concern about the spread and the prevalence of synthetic cannabinoids addressed."
National Poisons Centre toxicologist Leo Schep, of Dunedin, said he welcomed any changes to curtail the synthetic cannabinoids.
However, he believed the consumption of Kronic had peaked, and believed something else would turn up and replace it.
"This will be an ongoing cat and mouse game."
