The Police Minister says changes are needed to stop people driving while under the influence of drugs.
Michael Woodhouse spoke at the Drug Foundation's drug driving symposium in Wellington, and said not enough is known about the extent of drug driving, especially about how to test for it.
But what testing there is available shows drugs contibute to a number of road deaths, and the prevelance of them on the roads is increasing.
The Wireless will have more on this issue when we launch our podcast On the dial next week.
1 in 6 NZ drivers reportd using meds/drugs WITH alcohol that may have affected their driving last year #drugdrivingnz pic.twitter.com/ySgvJy135e
— Ben Birks Ang (@BirksAng) November 12, 2014