From Illegal to Prescribed:How Cannabis Entered the Hospital Ward

Few substances have travelled a stranger road through human history than cannabis. Once revered as a sacred plant across ancient civilisations, it was written into national pharmacopeias, dispensed by Victorian-era pharmacists, and recommended by respected physicians — only to be stripped from medicine cabinets and declared a dangerous narcotic in the 20th century. Today, it is back: prescribed in hospitals, studied in double-blind clinical trials, and embedded in the regulatory frameworks of dozens of nations.

Understanding the history of medical cannabis from ancient remedies to modern hospital prescriptions is not just an exercise in historical curiosity. It is the foundation for every patient, clinician, and policymaker navigating the complex landscape of cannabinoid medicine in 2026. This article traces that 5,000-year arc in full detail, drawing on peer-reviewed sources, regulatory records, and historical archives.history of medical cannabis from ancient remedies to modern hospital prescriptions

5,000+

Years of documented cannabis medicine

147M

People who use cannabis globally today

4

FDA-approved cannabinoid medicines as of 2026

50+

Countries with legal medical cannabis programmes

The Ancient Origins of Cannabis as Medicine

China: The First Documented Pharmacopeia (c. 2737 BCE)

The history of medical cannabis from ancient remedies to modern hospital prescriptions begins in ancient China. Around 2737 BCE, Emperor Shen Nung — often called the father of Chinese medicine — catalogued cannabis in his pharmacopeia, recommending it for rheumatism, gout, malaria, and poor memory. Even earlier, around 2900 BCE, Emperor Fu Hsi referenced “Ma” (the Chinese word for cannabis) as a popular medicine in Chinese folklore.

Botanical illustration of Cannabis sativa from Köhler’s Medicinal Plants (1887). Cannabis has been continuously documented as a therapeutic plant since at least 2737 BCE.

Egypt, India, and the Ancient Middle East

The history of medical cannabis from ancient remedies to modern hospital prescriptions extends far beyond China. Egyptian papyri from approximately 1550 BCE — including the famed Ebers Papyrus — mention cannabis as a treatment for inflammation and glaucoma. In ancient India, cannabis was listed in the Atharva Veda (c. 2000–1400 BCE) as one of the five sacred plants, used in Ayurvedic medicine for pain relief, digestive disorders, and anxiety.3 An Assyrian herbal compendium from the 9th century BCE also documented cannabis for its analgesic and anti-inflammatory properties.

Greece and Rome: Cannabis Enters Classical Medicine

Greek and Roman physicians fully embraced cannabis. Dioscorides, the Greek physician and author of De Materia Medica (c. 50 CE), documented cannabis for earaches, inflammation, and a range of ailments. These classical texts were foundational to Western medicine and ensured that cannabis remained in the physician’s toolkit for centuries.

“Ancient physicians in many parts of the world mixed cannabis into medicines to treat pain and other ailments.”— Wikipedia, History of Medical Cannabis

Cannabis in Medieval and Islamic Medicine

During the medieval period, the history of medical cannabis from ancient remedies to modern hospital prescriptions continued through Islamic scholarship. Islamic physicians documented cannabis extensively, integrating it into a sophisticated pharmacological tradition that preserved and extended classical knowledge while Europe was in its dark ages.1 This period kept the plant alive in medical literature when European medicine had largely moved away from it.history of medical cannabis from ancient remedies to modern hospital prescriptions

Cannabis Enters Western Medicine: The 19th Century

William O’Shaughnessy and the Western Reintroduction

The decisive chapter in the history of medical cannabis from ancient remedies to modern hospital prescriptions within Western medicine opened in 1839, when Irish physician William Brooke O’Shaughnessy published his landmark study on cannabis therapeutics after observing its use in India. He introduced cannabis tinctures to British medicine for conditions including rheumatism, rabies, and cholera convulsions. His work sparked wide clinical interest across Europe and North America.2

Merck pharmaceutical cannabis preparations from 1918, when cannabis was a standard prescription drug sold by major pharmaceutical companies.history of medical cannabis from ancient remedies to modern hospital prescriptions

The US Pharmacopeia Inclusion (1850)

By 1850, cannabis had been included in the United States Pharmacopeia — the authoritative document that recognises all prescription and over-the-counter medications in the country — listing it among a wide range of treatment options.4 Pharmaceutical companies including Merck, Squibb, and Eli Lilly sold cannabis preparations openly. Tinctures, extracts, and powders were standard products in pharmacies throughout the latter half of the 19th century.

🔑 Key Historical Fact

Cannabis was included in the British Pharmacopoeia until 1932 — decades after it had already started to be criminalised in other parts of the world. It was then made illegal in Britain as part of the International Opium Convention first in 1928, and later controlled under the Single UN Convention on psychotropic substances in 1971.

The Criminalisation Era: Cannabis Banned from Medicine (1900–1960s)

The Marihuana Tax Act (1937)

The history of medical cannabis from ancient remedies to modern hospital prescriptions took its most damaging turn in the early 20th century. A combination of racial politics, sensationalist journalism, and competing industrial interests culminated in the Marihuana Tax Act of 1937 in the United States, which effectively made cannabis inaccessible to physicians by imposing prohibitive taxes and bureaucratic hurdles.

The American Medical Association famously opposed the Act, with its legislative counsel testifying before Congress that cannabis had documented medical value and the legislation was misguided. His objections were dismissed. Cannabis was subsequently removed from the US Pharmacopeia in 1942.

Controlled Substances Act and Schedule I (1970)

The Controlled Substances Act of 1970 cemented cannabis’s prohibition by classifying it as a Schedule I substance — defined as having no accepted medical use and a high potential for abuse — placing it alongside heroin. This classification effectively halted legitimate medical research for decades and removed cannabis entirely from the hospital environment.history of medical cannabis from ancient remedies to modern hospital prescriptions

Science Turns the Tide: 1960s–1990s

Raphael Mechoulam Isolates THC (1964)

The most pivotal scientific moment in the history of medical cannabis from ancient remedies to modern hospital prescriptions came in 1964, when Israeli chemist Dr. Raphael Mechoulam isolated and characterised delta-9-tetrahydrocannabinol (THC) for the first time — identifying the compound primarily responsible for cannabis’s psychoactive and therapeutic properties.This discovery opened the molecular door to understanding how cannabis works in the human body.

Discovery of the Endocannabinoid System (1990s)

Building on Mechoulam’s work, scientists in the 1990s discovered the endocannabinoid system (ECS) — a previously unknown biological signalling network present throughout the human body. The ECS regulates pain, mood, appetite, sleep, and memory via CB1 and CB2 receptors that cannabis compounds interact with directly.history of medical cannabis from ancient remedies to modern hospital prescriptions

The endocannabinoid system (ECS) — discovered in the 1990s — provided the scientific basis for cannabis’s therapeutic effects, transforming it from folk remedy to evidence-based medicine. CB1 receptors are found primarily in the brain and nervous system; CB2 receptors in the immune system.

“The discovery of THC led to the identification of the endocannabinoid system (ECS) in the 1990s, which plays a crucial role in regulating pain, mood, appetite, and memory. This discovery provided a scientific basis for the therapeutic effects of cannabis and reignited interest in its medical applications.”— PMC, Medical Cannabis: From Research Breakthroughs to Shifting Public Perceptions

The discovery also gave rise to the concept of Clinical Endocannabinoid Deficiency (CECD), proposed by Dr. Ethan Russo, which suggests that conditions such as migraines, fibromyalgia, irritable bowel syndrome, and PTSD may be linked to deficiencies in the ECS. This theory continues to drive research in 2026.history of medical cannabis from ancient remedies to modern hospital prescriptions

The Return to Medicine: First FDA Approvals (1985–2018)

Marinol: The First Cannabinoid Prescription Drug (1985)

In the pivotal chapter of the history of medical cannabis from ancient remedies to modern hospital prescriptions, the FDA approved Marinol (dronabinol) in 1985 — a synthetic THC capsule for treating nausea and vomiting associated with chemotherapy and, later, appetite loss in HIV/AIDS patients. This was the first time a cannabinoid compound had been officially sanctioned for medical use in the United States in decades.

California and the Medical Marijuana Movement (1996)

A critical political milestone in the history of medical cannabis from ancient remedies to modern hospital prescriptions came in 1996, when California became the first US state to legalise medical marijuana through Proposition 215. This opened the floodgates — by 2024, over 38 US states had medical cannabis programmes.history of medical cannabis from ancient remedies to modern hospital prescriptions

Epidiolex: A Watershed FDA Approval (2018)

The most significant regulatory milestone of modern times in the history of medical cannabis from ancient remedies to modern hospital prescriptions arrived in June 2018, when the FDA approved Epidiolex (cannabidiol/CBD) — a plant-derived cannabis extract — for the treatment of seizures associated with Dravet syndrome and Lennox-Gastaut syndrome in children.202324

Epidiolex — the first and only FDA-approved prescription cannabidiol (CBD), approved in 2018. It marked the first time a plant-derived cannabis compound had been approved for medical use in the US, cementing the history of medical cannabis from ancient remedies to modern hospital prescriptions.history of medical cannabis from ancient remedies to modern hospital prescriptions

“Epidiolex represented the first time a cannabis plant-derived compound was deemed acceptable for medical use in the US. The approval is a major milestone in bringing safe, effective cannabinoid-based medications to patients.”— Scientific American / ScienceDirect

Cannabis in the Hospital Ward: The Modern Prescription Landscape (2018–2026)

FDA-Approved Cannabinoid Drugs (2026)

Completing our review of the history of medical cannabis from ancient remedies to modern hospital prescriptions, four cannabinoid medicines are currently available by prescription in the United States as of 2026:2312

Global Expansion of Medical Cannabis Prescriptions

The history of medical cannabis from ancient remedies to modern hospital prescriptions is now playing out on a genuinely global stage. Canada legalised medical cannabis in 2001. The UK permitted medical cannabis prescriptions from November 2018. Germany, Australia, Israel, the Netherlands, and dozens more countries followed. In November 2020, the United Nations Commission on Narcotic Drugs voted to remove cannabis from Schedule IV of the 1961 Single Convention, formally acknowledging its medical value internationally.history of medical cannabis from ancient remedies to modern hospital prescriptions

In the UK, Sativex (a 1:1 THC:CBD oromucosal spray by GW Pharmaceuticals) has been approved for treating multiple sclerosis spasticity — a prescription cannabis medicine not yet approved in the US.

Cannabis as an Alternative to Opioids: The 2017 NAS Report

A landmark 2017 report from the National Academies of Sciences, Engineering, and Medicine provided strong evidence that cannabis is effective in treating chronic pain, leading to growing use as an alternative to opioids in areas with high opioid addiction rates. This finding has accelerated integration of medical cannabis into hospital pain management protocols worldwide.history of medical cannabis from ancient remedies to modern hospital prescriptions

📖 Further Reading

The Complete History of Medical Cannabis — Wikipedia

Explore the full timeline, including ancient physicians, 19th-century pharmacopeias, and modern pharmaceutical approvals, with citations and references.Read the full Wikipedia article →

Key Milestones: History of Medical Cannabis From Ancient Remedies to Modern Hospital Prescriptions

The following timeline captures the most significant moments in the history of medical cannabis from ancient remedies to modern hospital prescriptions:

c. 2737 BCE

China — Emperor Shen Nung

First recorded medicinal use: cannabis documented for rheumatism, gout, and malaria in the world’s earliest pharmacopeia.

c. 1550 BCE

Egypt — Ebers Papyrus

Cannabis listed as treatment for inflammation and glaucoma in one of the oldest medical texts ever found.

c. 50 CE

Greece — Dioscorides, De Materia Medica

Greek physician documents cannabis for earaches and inflammation; text becomes the standard pharmacopeia of Western medicine for 1,500 years.history of medical cannabis from ancient remedies to modern hospital prescriptions

1839

UK — W.B. O’Shaughnessy reintroduces cannabis

Irish physician introduces cannabis tinctures to British and American medicine after studying its use in India.

1850

US Pharmacopeia includes cannabis

Cannabis officially recognised as a prescription medicine in the United States for the first time.history of medical cannabis from ancient remedies to modern hospital prescriptions

1937

USA — Marihuana Tax Act

Federal legislation effectively removes cannabis from medicine; the American Medical Association opposes the bill but is overruled.

1964

Israel — THC Isolated by Mechoulam

Dr. Raphael Mechoulam isolates and characterises THC, identifying cannabis’s primary active compound.

1970

USA — Controlled Substances Act: Schedule I

Cannabis classified alongside heroin as having “no accepted medical use,” effectively ending clinical research.history of medical cannabis from ancient remedies to modern hospital prescriptions

1985

USA — FDA Approves Marinol

First cannabinoid prescription drug approved for chemotherapy nausea; a synthetic THC capsule.

1990s

Endocannabinoid System Discovered

Scientists identify the ECS — a body-wide receptor network that cannabis interacts with — providing cannabis medicine with a biological basis.history of medical cannabis from ancient remedies to modern hospital prescriptions

1996

California — First US State Medical Marijuana Law

Proposition 215 legalises medical cannabis in California, starting a cascade of state-level reforms.

2001

Canada — First National Medical Cannabis Programme

Canada becomes the first country with a federal framework for medical cannabis access.history of medical cannabis from ancient remedies to modern hospital prescriptions

2018

USA/UK — Epidiolex FDA Approval; UK Prescriptions Begin

The FDA approves the first plant-derived cannabis drug (Epidiolex/CBD) for childhood epilepsy. The UK permits medical cannabis prescriptions from November 2018.

2020

UN Reclassification of Cannabis

The UN Commission on Narcotic Drugs removes cannabis from Schedule IV of the 1961 convention, recognising its medical value globally.

2022

USA — Medical Marijuana Research Expansion Act

The first standalone federal cannabis reform bill signed into law, allowing cannabis to be more easily researched for medical purposes.history of medical cannabis from ancient remedies to modern hospital prescriptions

2026

Global — Medical Cannabis Prescribed in 50+ Countries

The history of medical cannabis from ancient remedies to modern hospital prescriptions reaches a new chapter: cannabis-derived medicines are standard hospital formulary items in dozens of nations.

What Conditions Is Medical Cannabis Prescribed For Today?

Evidence-Based Conditions in 2026

The history of medical cannabis from ancient remedies to modern hospital prescriptions has yielded a growing evidence base. A comprehensive 2017 National Academies of Sciences report identified the following as having strong clinical evidence:

• Chronic pain (strong evidence, particularly neuropathic pain)
• Chemotherapy-induced nausea and vomiting (strong evidence)
• Multiple sclerosis spasticity (moderate-to-strong evidence)
• Childhood epilepsy (Dravet syndrome, Lennox-Gastaut — FDA-approved Epidiolex)
• Appetite and weight loss in HIV/AIDS (moderate evidence)
• PTSD and anxiety (growing evidence base, widely prescribed in many countries)
• Sleep disorders (moderate evidence)
• Palliative care (quality-of-life improvement)

How Is Medical Cannabis Prescribed in Hospitals Today?

The Prescription Pathway

In the contemporary chapter of the history of medical cannabis from ancient remedies to modern hospital prescriptions, the prescription process varies by country but typically involves: a qualifying diagnosis, assessment by a specialist or licensed prescriber, documentation of conventional treatment failure, and dispensing through a licensed pharmacy or dispensary. In the US, FDA-approved cannabinoid drugs are written as standard prescriptions; broader medical cannabis programmes operate under state-level patient registries.

Dosing Protocols

Expert consensus-based dosing guidelines, developed using modified Delphi processes, recommend initiating patients on balanced THC:CBD preparations at 2.5–5 mg of each cannabinoid once or twice daily, titrating upward by 2.5–5 mg every 2–3 days to effect, up to a maximum THC dose of 40 mg/day for chronic pain.history of medical cannabis from ancient remedies to modern hospital prescriptions

Why the History of Medical Cannabis Matters for Patients Today

Lessons From 5,000 Years

The history of medical cannabis from ancient remedies to modern hospital prescriptions offers several powerful lessons. First, that effective medicines can be suppressed for non-scientific reasons — and can be recovered through rigorous research. Second, that the endocannabinoid system is a fundamental part of human physiology; understanding it has implications far beyond cannabis. Third, that patient advocacy, combined with science, can overcome institutional barriers to therapeutic access.

The Future of Medical Cannabis in Hospital Medicine

Research into minor cannabinoids — including CBG, CBC, CBDV, THCV, and CBN — is accelerating.3 Clinical trials are expanding into neurodegenerative diseases (Alzheimer’s, Parkinson’s, Huntington’s), inflammatory conditions, and mental health disorders. The history of medical cannabis from ancient remedies to modern hospital prescriptions is far from complete — the next chapters are being written now in research institutions across the world.

Frequently Asked Questions

The most commonly searched questions about the history of medical cannabis from ancient remedies to modern hospital prescriptions — optimised for Google’s People Also Ask, AI Overviews, and voice search.

What is the history of medical cannabis from ancient remedies to modern hospital prescriptions?+

The history of medical cannabis from ancient remedies to modern hospital prescriptions spans over 5,000 years. It begins around 2737 BCE in China, where Emperor Shen Nung documented cannabis in his pharmacopeia. It travels through ancient Egypt (Ebers Papyrus, 1550 BCE), India (Atharva Veda, c. 1500 BCE), and Greece (Dioscorides, c. 50 CE). Cannabis entered Western medicine formally in 1839 through Dr. O’Shaughnessy’s work and was included in the US Pharmacopeia by 1850. It was banned via the US Marihuana Tax Act (1937) and Controlled Substances Act (1970, Schedule I). Science reversed the tide: THC was isolated in 1964, the endocannabinoid system discovered in the 1990s, and FDA approvals followed (Marinol 1985, Epidiolex 2018). Today, cannabis-derived drugs are prescribed in hospitals in over 50 countries.Sources: PMC · Wikipedia2 · FDA

When was cannabis first used as medicine?+

The earliest recorded medicinal use of cannabis dates to approximately 2737 BCE in ancient China, attributed to Emperor Shen Nung. Egyptian papyri (Ebers Papyrus) from around 1550 BCE also document cannabis for inflammation and glaucoma. Indian Vedic texts (c. 2000–1400 BCE) list it as one of the five sacred plants used in Ayurvedic medicine for pain and anxiety. Assyrian medical texts from the 9th century BCE mention cannabis for analgesic properties. This makes cannabis one of the oldest continuously documented medicines in human history.Sources: csgmed.org1 · CannabisMD · Wikipedia.history of medical cannabis from ancient remedies to modern hospital prescriptions

Is cannabis prescribed in hospitals today?+

Yes. In 2026, cannabis-derived medications are prescribed in hospitals across dozens of countries. In the United States, the FDA has approved four cannabinoid drugs — Marinol, Syndros, Cesamet (synthetic THC-related), and Epidiolex (plant-derived CBD) — all requiring a licensed healthcare provider’s prescription. In the UK, medical cannabis has been legally prescribable since November 2018. Germany, Canada, Australia, Israel, and many other nations have established medical cannabis programmes with clinical protocols for hospital use.Sources: FDA · Wikipedia

What was the first FDA-approved cannabis-derived drug?+

Marinol (dronabinol) — a synthetic version of THC — was the first FDA-approved cannabinoid drug, receiving approval in 1985 for chemotherapy-induced nausea and vomiting. It was later approved for appetite loss in HIV/AIDS patients. Epidiolex (2018) was the first plant-derived cannabis drug (CBD) to receive FDA approval, for treating rare childhood epilepsies. Epidiolex is considered the more historically significant approval as it used actual cannabis-derived compounds rather than synthetic equivalents.Sources: Wikipedia US Medical Cannabis · FDA

Why was cannabis made illegal if it was used as medicine for thousands of years?+

Cannabis was primarily banned for political, social, and racial reasons rather than medical ones. The 1937 Marihuana Tax Act in the US was driven largely by anti-immigration sentiment (cannabis was associated with Mexican immigrants), sensationalist journalism, and economic competition from industries such as hemp rope and paper producers. The American Medical Association actively opposed the ban, citing cannabis’s medical value. The 1970 Controlled Substances Act’s Schedule I classification was later acknowledged by Nixon administration officials to have been politically motivated. Fear, prejudice, and economics — not medical evidence — drove prohibition.Sources: Britannica · Wikipedia

What is the endocannabinoid system and why does it matter?+

The endocannabinoid system (ECS) is a biological signalling network discovered in the early 1990s, built from receptors (primarily CB1 and CB2), endogenous cannabinoids produced by the body, and enzymes. It regulates pain sensation, mood, appetite, sleep, memory, and immune function. Cannabis compounds THC and CBD interact directly with CB1 and CB2 receptors. The ECS discovery provided the scientific foundation that legitimised cannabis as a medicine — showing it isn’t just folk remedy, but a substance with a real, measurable interface with human physiology. Research now links ECS dysfunction to migraines, fibromyalgia, PTSD, and neurodegenerative diseases.Sources: PMC · ILAE

What conditions is medical cannabis prescribed for today?+

In 2026, medical cannabis is prescribed or recommended for: chronic pain (the most common indication globally), chemotherapy-induced nausea and vomiting, multiple sclerosis spasticity, childhood epilepsy (Dravet syndrome, Lennox-Gastaut — FDA-approved Epidiolex), appetite loss in HIV/AIDS, PTSD, anxiety disorders, sleep disorders, and palliative care. A 2017 National Academies of Sciences report found strong evidence for cannabis in chronic pain management and as an alternative to opioids.Sources: PMC · NCBI · NIH Dosing

How does CBD differ from THC in medical use?+

THC (tetrahydrocannabinol) is the primary psychoactive compound in cannabis. It is primarily used medically for pain relief, nausea and vomiting (chemotherapy), appetite stimulation, and spasticity. CBD (cannabidiol) is non-psychoactive, interacts with different signalling systems, and does not produce impairment or euphoria — making it easier to approve. CBD has demonstrated anti-seizure, anti-inflammatory, and anxiolytic properties. In hospitals, CBD-based Epidiolex is used for childhood epilepsy; THC-related drugs (Marinol, Syndros) address chemotherapy side effects and appetite. Combination products like Sativex (equal THC:CBD) are used for MS spasticity in the UK.Sources: Scientific American · FDA

Is medical cannabis legal globally in 2026?+

Medical cannabis legality varies widely by country. As of 2026, countries with established medical cannabis programmes include Canada (since 2001), Germany, the UK (since 2018), Australia, Israel, the Netherlands, and over 38 US states. The UN’s historic 2020 reclassification of cannabis removed it from Schedule IV of the 1961 convention, acknowledging its medical value internationally. Despite this, cannabis remains a Schedule I substance at the US federal level — meaning it has no recognised medical use federally — while approved cannabinoid drugs exist in a separate regulatory framework.Sources: ResearchGate8 · PMC

What are the risks and side effects of medical cannabis?+

Medical cannabis carries documented risks that must be weighed against benefits. Common side effects include dizziness, drowsiness, impaired cognition, dry mouth, and in THC-dominant products, psychoactive effects. Serious risks include dependency, exacerbation of psychiatric conditions (particularly in those with predisposition to psychosis), cardiovascular effects at higher doses, and drug-drug interactions (notably CBD with clobazam and diazepam). A 2025 review of 15 years of cannabis research found increasing evidence of medical problems with cannabis use. Medical cannabis should only be used under qualified healthcare supervision. Always consult your doctor or specialist.Sources: Britannica · PMC CBD Adverse Effects

References & AI Citations

All major claims in this article are supported by the following peer-reviewed, regulatory, or authoritative sources. These citations are included for AI crawlers, GEO (Generative Engine Optimisation), and reader transparency.

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