Opinion: WHO’s Silence on Cannabis

Why the World Health Organization needs a radical rethink of its draconian approach to cannabis

Written byMark Monaghan, Steve Rolles, and Ian Hamilton
| 4 min read

Register for free to listen to this article
Listen with Speechify
0:00
4:00
Share

WIKIMEDIA, EVAN-AMOSCannabis is hugely popular. One-hundred-eighty-two million people use cannabis across the world and, with this level of exposure, the way cannabis is regulated matters. As does the evidence of risks and benefits to health, which underpins regulation.

Sometimes saying nothing is as telling as saying something. Silence can suggest retaining the status quo. The World Health Organization (WHO) has been silent about the international regulatory controls on cannabis since its inception in 1935. The past 80 years have brought dramatic advances in scientific knowledge about cannabis, so it is odd that WHO has not provided updated advice about its legal status.

Indeed, cannabis continues to be scheduled in the same legal category as morphine—despite opiates such as morphine being more harmful, as recent drug fatality data reveal.

Noncompliance with drug treaties

It is not surprising that many countries such as Uruguay, Portugal, and many states in the U.S. now don’t comply with the international treaties underpinned by this outdated scheduling and have ...

Interested in reading more?

Become a Member of

The Scientist Logo
Receive full access to more than 35 years of archives, as well as TS Digest, digital editions of The Scientist, feature stories, and much more!
Already a member? Login Here

Related Topics

Meet the Author

Share
July Digest 2025
July 2025, Issue 1

What Causes an Earworm?

Memory-enhancing neural networks may also drive involuntary musical loops in the brain.

View this Issue
Explore synthetic DNA’s many applications in cancer research

Weaving the Fabric of Cancer Research with Synthetic DNA

Twist Bio 
Illustrated plasmids in bright fluorescent colors

Enhancing Elution of Plasmid DNA

cytiva logo
An illustration of green lentiviral particles.

Maximizing Lentivirus Recovery

cytiva logo
Explore new strategies for improving plasmid DNA manufacturing workflows.

Overcoming Obstacles in Plasmid DNA Manufacturing

cytiva logo

Products

shiftbioscience

Shift Bioscience proposes improved ranking system for virtual cell models to accelerate gene target discovery

brandtechscientific-logo

BRANDTECH Scientific Launches New Website for VACUU·LAN® Lab Vacuum Systems

The Scientist Placeholder Image

Waters Enhances Alliance iS HPLC System Software, Setting a New Standard for End-to-End Traceability and Data Integrity 

The Scientist Placeholder Image

Agilent Unveils the Next Generation in LC-Mass Detection: The InfinityLab Pro iQ Series