Police Minister Paula Bennett says anybody thinking about trying methamphetamine because marijuana is harder to get should think again.
Bennett said she was increasingly concerned about meth or "P" use in New Zealand. Most of what is being consumed is smuggled into the country.
"I've heard anecdotally that it was a bad growing season for marijuana in some parts of New Zealand - I'm not the expert on that - and as a consequence that has driven up the price of marijuana and made P more attractive," Bennett said.
"Can I just say to every New Zealander that is thinking that, is actually, a bit of a toke on marijuana is incredibly different to having a go at P. Which is one hit and you are hooked. And it takes an average seven years to get off that addictive substance.
"And it is not just soul destroying for the individual, but we see families in so many of our towns and cities that are absolutely destroyed because one member is going through the hideous addiction of it."