Understanding Medicinal Cannabis and Driving in New Zealand
Helping medicinal cannabis patients make informed and responsible driving decisions.
Many medicinal cannabis patients in New Zealand have questions about driving. Those questions are reasonable, and they are common.
- Can I drive?
- How does medicinal cannabis affect driving?
- How do roadside drug tests work?
- Should I keep treatment records?
There is no single answer that applies to everyone. Prescribed products differ, doses differ, treatment plans differ, and individual responses differ. Two people following their own prescriptions can be in quite different circumstances.
This guide introduces the topic at a high level and points you to more detailed guides in the Learning Hub. Nothing here tells you whether you can drive — that is a matter for you, your prescribing healthcare professional and the law.
What you'll learn
Each guide below covers one topic in more detail.
One of the most searched questions by patients, answered honestly: the factors that make every person's circumstances different.
What roadside drug testing is, why treatment records matter, and what DriveClear can and cannot tell you.
The authoritative explanation of the Personal Reference Period: what it is, why it exists, and what it is not.
Memory is unreliable over months. Here is what an accurate personal treatment record actually gives you.
What CBD and THC are in simple terms, and why knowing your own prescribed product matters.
Why accurate records matter
Treatment is rarely a single event. Over weeks and months, most people record their doses in memory alone — and memory fades. The exact product, the exact dose and the exact time all blur together.
Keeping accurate records helps you understand your own treatment history rather than relying on recollection. It can also make conversations with your prescriber more useful, because you are describing what actually happened rather than what you think happened.
How DriveClear helps
DriveClear is a private, on-device record-keeping app. It lets you:
- Record each intake
- Track your Personal Reference Period
- Record optional symptoms and wellbeing
- Maintain a private treatment history
- Generate a Roadside Summary
DriveClear records information you enter. It does not assess impairment and does not decide whether it is safe or lawful for you to drive.
Continue learning
One of the most searched questions by patients, answered honestly: the factors that make every person's circumstances different.
What roadside drug testing is, why treatment records matter, and what DriveClear can and cannot tell you.
The authoritative explanation of the Personal Reference Period: what it is, why it exists, and what it is not.
Memory is unreliable over months. Here is what an accurate personal treatment record actually gives you.
A practical explanation of New Zealand's roadside oral-fluid drug testing procedure, including screening, laboratory analysis and the 12-hour driving prohibition.
A plain-English explanation of the statutory medical defence in section 64 of the Land Transport Act 1998, and why prescriptions, instructions and timing can all matter.