DrugsNew Zealand
An introduction to the traffic rules and road signs of New Zealand. Learn about driving, road safety and much more in our illustrated book, with answers to frequently asked questions.
For informational purposes only. Always follow official regulations. Some content and images were created with AI assistance.
221. Drugs
Drugs can seriously affect driving by changing perception, concentration, reaction time, coordination and judgement. Stimulants, cannabis, opioids and other psychoactive substances can each impair driving in different ways, and combining drugs with alcohol or other substances can increase the risk further. The effects may continue even after a person no longer feels intoxicated. Drug-driving laws vary between countries, but drivers should never drive when a substance affects their ability to control the vehicle safely.
Can drugs lead to an offence even if a driver feels capable in New Zealand?
Yes. New Zealand prohibits driving when impaired by drugs and also has specified drug-concentration limits. Some prescription medicines are covered. Ask a healthcare professional and do not drive if affected.

Traffic rules
New Zealand