Six so-called legal highs have been recalled before a total ban announced by the Government is introduced next week.
Earlier this week the Government announced plans to ban all 41 synthetic cannabis products and party pills that had been granted interim approval, until they can be proven low risk.
On Thursday the Ministry of Health said it had revoked the licences to manufacture and sell six of those drugs, effective immediately.
It said it made the decision because the products pose more than a low risk to people's health.