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Cannabis-Based Therapies – Evidence Library

This page provides a curated selection of reputable, peer-reviewed and institutional resources on cannabis and cannabinoids for healthcare professionals and pharmacies. It is intended for education only and does not replace clinical judgement, local guidelines, or regulatory advice.


Contents


1. National Academies of Sciences – The Health Effects of Cannabis and Cannabinoids

Full citation:
National Academies of Sciences, Engineering, and Medicine. The Health Effects of Cannabis and Cannabinoids: The Current State of Evidence and Recommendations for Research. 2017.

Type: Comprehensive evidence review (10,000+ studies)

Abstract (summary for clinicians):
This landmark report synthesises thousands of studies evaluating the health effects of cannabis and cannabinoids. It concludes that there is substantial evidence to support use of cannabis-based products for several indications (such as certain pain and spasticity contexts), moderate evidence for others, and limited or insufficient evidence in many areas where cannabis is commonly used in practice. The authors also review potential adverse effects and public health considerations, and call for improved research quality. Overall, the report positions cannabis and cannabinoids as clinically relevant but complex therapeutic options that should be considered within regulated, prescriber-supervised frameworks.

Key clinical takeaways:

  • Substantial evidence for benefit in a limited number of indications.
  • Important safety and public health considerations require careful patient selection and monitoring.
  • Significant gaps remain, supporting the need for ongoing, high-quality trials.

Link:
https://nap.nationalacademies.org/catalog/24625

2. Harvard Health – Medical Marijuana (Overview)

Source: Harvard Health Publishing – “Medical marijuana” (topic overview, updated periodically)

Type: Clinical overview for health professionals and patients

Summary:
Harvard Health provides a balanced overview of medical marijuana, including potential therapeutic applications, routes of administration, adverse effects, and regulatory considerations in jurisdictions where it is permitted. The piece acknowledges that cannabis-based therapies can be useful for selected patients under supervision, while emphasising the importance of evidence-based prescribing and awareness of potential harms.

Key clinical takeaways:

  • Recognises potential therapeutic roles for cannabis-based products under medical supervision.
  • Highlights adverse effects, drug interactions, and contraindications clinicians should consider.
  • Encourages cautious, evidence-informed use rather than indiscriminate prescribing.

Link:
https://www.health.harvard.edu/topics/marijuana

3. The Lancet Psychiatry – Cannabis and Mental Health

Example citation:
The Lancet Psychiatry. Various articles on cannabis, mental health, and therapeutic opportunities and risks.

Type: Peer-reviewed commentary and reviews

Summary:
Articles in The Lancet Psychiatry discuss both potential therapeutic applications of cannabinoids and the mental health risks associated with heavy or early-onset use, particularly in vulnerable populations. While cautious about psychiatric harms, the journal recognises that cannabinoids may have roles in specific indications when used within controlled clinical settings.

Key clinical takeaways:

  • Emphasises careful risk–benefit assessment, particularly in patients with existing or high risk of psychosis.
  • Supports the concept of regulated, clinician-guided use rather than unregulated consumption.
  • Highlights the need for standardised products and robust clinical data in mental health applications.

Example link:
https://www.thelancet.com/journals/lanpsy

4. New England Journal of Medicine – Cannabinoids in Medicine

Example citation:
NEJM Perspective articles on cannabinoids and their evolving role in medicine.

Type: Perspective / clinical commentary

Summary:
NEJM perspectives describe the growing integration of cannabinoid-based medicines into contemporary clinical practice, particularly in areas such as epilepsy and symptom management where evidence is more established. The articles highlight the need for standardised formulations, pharmacovigilance, and alignment with regulatory frameworks, while acknowledging that cannabinoids now occupy a legitimate, if evolving, place in modern therapeutics.

Key clinical takeaways:

  • Recognises cannabinoids as legitimate therapeutic options in certain evidence-supported contexts.
  • Stresses quality control, dosing consistency, and post-marketing surveillance.
  • Encourages integration into care pathways aligned with regulatory and ethical standards.

Link (example):
https://www.nejm.org/

5. BMJ Editorial – Cannabis-Based Medicines

Source: BMJ editorial content on cannabis-based medicines

Type: Editorial / opinion in a high-impact medical journal

Summary:
BMJ editorials argue that cannabis-based medicines should not be overlooked as potential therapeutic tools when supported by evidence and used in regulated pathways. They support structured access, prescriber oversight, and clear product standards, while cautioning against both uncritical enthusiasm and excessive regulatory barriers that limit access for appropriate patients.

Key clinical takeaways:

  • Supports regulated access to cannabis-based medicines where evidence supports benefit.
  • Advocates for balanced policy that enables access but protects patients from harm.
  • Positions cannabis-based therapies as part of mainstream, evidence-informed medicine.

Link (example):
https://www.bmj.com/

6. UCLA Cannabis Research Initiative – Why Study Cannabis?

Source: UCLA Semel Institute – Cannabis Research Initiative

Type: Academic research program overview

Summary:
The UCLA Cannabis Research Initiative outlines key areas of scientific investigation, including therapeutic potential, public health implications, and policy impacts of cannabis use. The initiative reflects growing recognition within academic medicine that cannabis is a significant area of clinical and translational research, with potential benefits when used appropriately and clear risks when misused.

Key clinical takeaways:

  • Highlights cannabis as an active area of serious academic and clinical research.
  • Focuses on harm reduction, therapeutic potential, and evidence-based policy.
  • Reinforces the importance of clinician literacy in cannabinoid pharmacology.

Link:
https://cannabis.semel.ucla.edu/

7. The Conversation – What We Know About Medicinal Cannabis So Far (Australia)

Source: The Conversation – “What we know about medicinal cannabis so far”

Type: Expert-written explainer (Australia-specific)

Summary:
This article summarises the current evidence for medicinal cannabis use in Australia, reviewing indications where data are strongest, the regulatory framework, and practical considerations for prescribers. It presents medicinal cannabis as an emerging therapeutic option within Australia’s tightly regulated system, emphasising clinician oversight, patient selection, and the need for ongoing research.

Key clinical takeaways:

  • Provides an Australian context for medicinal cannabis regulation and access pathways.
  • Outlines evidence-supported indications and areas of uncertainty.
  • Useful as a concise orientation resource for prescribers new to this space.

Link:
https://theconversation.com/what-we-know-about-medicinal-cannabis-so-far-2017

8. Australian Parliamentary Library – Medicinal Cannabis: A Quick Guide

Source: Parliament of Australia – Parliamentary Library

Type: Policy and regulatory overview

Summary:
This guide outlines the legislative and regulatory framework for medicinal cannabis in Australia, including federal reforms, access schemes, and scheduling. It recognises the therapeutic use of cannabis-based products under specific conditions and provides context for how these therapies fit within Australia’s broader medicines and controlled substances system.

Key clinical takeaways:

  • Clarifies how medicinal cannabis is regulated at the federal level in Australia.
  • Useful for aligning clinical practice with current policy and legal requirements.
  • Supports prescribers and pharmacies in understanding compliant access pathways.

Link:
https://www.aph.gov.au/


Disclaimer: This evidence library is for informational purposes only and is restricted to healthcare professionals and pharmacies. It is not intended as medical advice for the public and does not endorse any specific product or brand. Prescribing decisions should be based on the totality of evidence, individual patient circumstances, and applicable regulatory requirements.