Researchers Mapped Out Cannabis Harm Reduction Strategies Into a Practical Typology | Research

The takeaway

A systematic review identified and categorized cannabis harm reduction interventions into legal, socio-organizational, and health-related approaches across multiple countries.

Policymakers designing cannabis regulations, harm reduction practitioners, public health officials in legalizing jurisdictions.

35 studies across 3 harm reduction domains

What the researchers found

From a systematic review of 35 documents published 2011-2022, the authors developed a typology of cannabis harm reduction strategies covering three domains: legal interventions (regulatory approaches), socio-organizational interventions (community and institutional measures), and health-related interventions (clinical and public health approaches). The review identified innovative strategies from peers, government bodies, and third-sector organizations.

Why it matters

As cannabis legalization expands, harm reduction approaches become increasingly important. This typology provides the first organized framework for understanding the full range of available strategies, from regulatory to health-based, giving policymakers and practitioners a structured way to evaluate and implement interventions.

The numbers in context

35 documents included. Studies from 2011-2022. Covered Europe, Americas, Australia, New Zealand. Three-domain typology: legal, socio-organizational, health-related.

How the study worked

Systematic literature review with a two-concept search across Embase and other databases, supplemented by citation searches and manual website searching. Studies published 2011-2022 from Europe, the Americas, Australia, or New Zealand were included. All study designs except case reports, non-systematic reviews, editorials, and news stories were eligible. 35 documents met inclusion criteria.

What this study cannot tell us

Many included studies relied on qualitative methods with small samples. Limited to English-language publications. Geographic scope excluded Asia and Africa. The evidence base for many harm reduction strategies remains thin.

How to read the evidence

Moderate: systematic review methodology, but many included studies used qualitative methods and the evidence base is still developing.

When this study was published

2025 study (literature 2011-2022)

The bigger picture

Cannabis harm reduction has lagged behind approaches for alcohol and opioids. This typology fills a gap by mapping the landscape of existing interventions, making it easier for jurisdictions to adopt evidence-based strategies rather than starting from scratch.

Questions still open

Which harm reduction strategies have the strongest evidence of effectiveness? How should approaches differ between medical and recreational cannabis contexts? Can harm reduction frameworks from alcohol and tobacco be effectively adapted for cannabis?

Common questions

What types of cannabis harm reduction exist?

The review identified three broad categories: legal interventions (regulation, age limits), socio-organizational interventions (community programs, workplace policies), and health-related interventions (clinical screening, treatment, public education).

Is there good evidence that cannabis harm reduction works?

The evidence base is still developing. Many strategies have been implemented but not rigorously evaluated. The review found 35 relevant studies, many using qualitative methods.

Read the original research

Harm reduction strategies for cannabis-related problems: a literature review and typology.

European archives of psychiatry and clinical neuroscience, 275(2), 379-388

View on PubMed ↗Publisher’s paper ↗

Citation

Pratschke, Jonathan. (2025). Harm reduction strategies for cannabis-related problems: a literature review and typology.. European archives of psychiatry and clinical neuroscience, 275(2), 379-388. https://doi.org/10.1007/s00406-024-01839-3