The medical cannabis industry may feel young, but the science behind it has roots reaching back nearly two centuries, with cannabis use in general going back thousands of years. Behind today’s headlines and regulatory debates lies the work of visionary scientists, doctors, and innovators whose discoveries shaped everything we now know about cannabis as medicine.
As the UK industry grows; with domestic cultivation, prescribing clinics, and research all on the rise, it’s worth pausing to recognise the individuals whose work continues to guide how we grow, extract, study, and ultimately prescribe cannabis-based medicines.
Here are just a few of the pioneers whose contributions have left a lasting mark on the field.
Professor Raphael Mechoulam: The “Godfather” of Cannabis Research
No list could begin anywhere else. In the early 1960s, Professor Mechoulam and his team in Israel first isolated THC and CBD, the primary cannabinoids in cannabis. Three decades later, they identified anandamide, the first endogenous cannabinoid, leading to the discovery of the endocannabinoid system, a network of receptors and signalling molecules that help regulate processes across the human body.
This system underpins nearly all modern medical cannabis research, and its discovery remains one of the most significant breakthroughs in neurobiology of the past century.
Sir William Brooke O’Shaughnessy: Bringing Cannabis to Western Medicine
Long before Mechoulam’s work, Irish physician William O’Shaughnessy documented the therapeutic use of cannabis while working in India in the 1830s. He observed its effects on conditions like tetanus and rheumatism and introduced it to Western medicine, opening the door for cannabis-based treatments in Europe and beyond.
Allyn Howlett & William Devane: Mapping the Receptors
In the 1980s, neuroscientist Allyn Howlett and colleague William Devane made a landmark discovery: cannabinoid receptors (CB1 and CB2) in the human body. Their work revealed the biological pathways through which cannabinoids exert their effects, providing the missing link between plant chemistry and human physiology.
D. Gold and JD “Graywolf” Ellis: Pioneers of Extraction
Medical cannabis today relies on precise, standardised extraction methods; but these had to start somewhere.
- In 1972, author D. Gold published Cannabis Alchemy, detailing some of the earliest cannabinoid extraction methods for therapeutic use.
- Decades later, JD “Graywolf” Ellis advanced closed-loop hydrocarbon extraction systems, revolutionising safety, efficiency, and consistency in modern cannabis processing.
Their work laid the foundation for the sophisticated extraction techniques now standard in pharmaceutical cannabis production.
Looking Ahead
Each of these figures played a part in transforming cannabis from a plant with anecdotal benefits into a subject of serious scientific and medical inquiry. Their discoveries continue to shape clinical research, regulatory frameworks, and patient care today.
As the UK’s medical cannabis industry grows, acknowledging this history isn’t just about honouring the past, it’s about understanding the science, ethics, and innovation that must guide its future.
At Dalgety, we believe that building a responsible, evidence-based industry means standing on the shoulders of giants and ensuring the next generation of pioneers has the support they need to push the field even further.
Disclaimer:
The information provided in this blog is for educational purposes only and is intended for healthcare professionals involved in the prescribing and administration of cannabis-based medicinal products (CBMPs). It does not constitute medical advice, diagnosis, or treatment recommendations. While every effort has been made to ensure accuracy, regulatory guidelines and clinical best practices may evolve. Prescribers should refer to the latest guidance from the Medicines and Healthcare products Regulatory Agency (MHRA), the National Institute for Health and Care Excellence (NICE), and other relevant bodies when making treatment decisions. Dalgety does not endorse any specific product or treatment pathway and encourages healthcare professionals to exercise their clinical judgement in patient care.
