Chronic non-cancer pain
The most common reason NZ patients ask about medical cannabis — but the evidence shows a large base with only a small, inconsistent effect.
Last reviewed 15 June 2026 · Education, not medical advice
A large evidence base, but the demonstrated effect is small or inconsistent.
Can medicinal cannabis help with chronic pain in NZ?
Mixed evidence for chronic pain. The most common reason NZ patients ask about medical cannabis — but the evidence shows a large base with only a small, inconsistent effect.There is no fixed list of qualifying conditions in NZ — whether it's appropriate for you is a clinical judgement for a registered doctor. This is education, not a treatment recommendation.
What the evidence says
Chronic pain has a large evidence base and a small demonstrated effect. In one major review, 30% pain reduction was reached by 29.0% of patients vs 25.9% on placebo (number-needed-to-treat 24); a BMJ 2021 analysis estimated NNT 10 for a 1 cm reduction on a 10 cm scale. Harms are common (number-needed-to-harm around 6). NZ guidance is clear that cannabis is not first-line for any indication and is reserved as a last-line add-on after standard therapies.
Cannabinoids studied
- Balanced THC:CBD
- THC
Key cautions
- Harms can outweigh the modest benefit.
- THC: dizziness, sedation, faster heart rate, impaired reaction time.
- Drug interactions; not a replacement for evidence-based therapy.
Sources
Peer-reviewed reviews, trial data and official guidance. We never fabricate figures.
What to do next
If you think medicinal cannabis might help with chronic pain, the next step is a conversation with a registered New Zealand doctor, who can weigh your individual situation. Start with your own GP or a clinic that focuses on cannabis medicine. Our step-by-step pathway walks through the whole process, and our self-check can help you prepare.
This is general information, not medical advice. Only a registered New Zealand doctor can decide whether medicinal cannabis is right for you.
Reviewed for accuracy by the mc.nz editorial team against the cited sources. Last reviewed 15 June 2026.