In the last week, at least 14 people have been treated in Rotorua Hospital after presenting with synthetic cannabis-related symptoms.
There were five people taken to hospital last Friday, four on Saturday, four on Sunday and one today. One patient was taken to Taupo Hospital on Saturday.
Symptoms are said to include immediate vomiting, loss of consciousness and violent behaviour.
Rotorua police area prevention manager Inspector Stuart Nightingale previously told the Rotorua Daily Post that police had made it clear people should stay away from the drugs.
Rotorua high schools which responded to questions from the Rotorua Daily Post said they had not specifically spoken to students about synthetic cannabis, but included drug ad alcohol education in their curriculum.
"We have always been very aware of the danger that drug and alcohol abuse poses to our students and this topic is included in our health curriculum. When appropriate we bring in visiting speakers to address our students and have counselling services on hand to follow up any issues with our students," one school responded.