"We are not going to stand by while these substances are being constantly made and put up for sale."
He said the long term aim was to introduce legislation which required makers to prove the drug was safe before it could be sold.
He said other substances such as party pills would be considered as part of longer term changes, but the immediate concern was about the 43 drugs in question.
Associate Health Minister Peter Dunne will introduce a Supplementary Order Paper to the Misuse of Drugs Amendment Bill that will allow a temporary order to be put on substances like Kronic.
Such an order will take the products off the market for 12 months while their safety is tested.
Mr Dunne said the temporary class drug notices will be an interim measure which will mean the substances, although not Class C1 controlled drugs, will carry the same penalties as Class C1 drugs.
He said the process around dealing with these substances has been complex and it was important that the Government get it right.
"Critics have pointed to faster responses overseas, but some of those laws are coming unstuck already, with new products coming on to the market that are not covered.
"We have addressed that here. If new products turn up and we are concerned about them, we will be able to put temporary class drugs notices on them straight away.
- NZ Herald staff