The Thai Arc: From Ban to 2022 Legalization — and the Fragile Medical-Only Reality of 2026

In June 2022, Thailand did what almost no one expected: it became the first country in Asia to remove cannabis from the narcotics list. Queues formed outside shops in Bangkok, a million seedlings were handed out, roughly 4,200 prisoners were released, and headlines spoke of a “green gold rush.” The man who signed the order — Public Health Minister Anutin Charnvirakul — spoke of the plant this way: “cannabis is like gold, something valuable that should be promoted.”

Four years later, the same Anutin, now Thailand’s prime minister, told journalists something else: if smuggling cannot be stopped, he is prepared to “shut down” the industry entirely.

Between those two sentences lies the entire arc this text was written to trace. Not “Thailand legalized, then banned it again,” but a far more interesting story: how the state removed the plant from the narcotics list faster than it built a law for it; how eighteen and a half thousand retail points entered the gap that opened over three years; how a collapse in prices pushed the harvest into smuggling corridors as far as London and Jakarta; and how, in response, cannabis was locked away not back inside a narcotics statute, but inside a different cage — traditional medicine, with a prescription at the door.

This is not a guide to “where to buy on Samui.” It is an attempt to assemble an honest chronicle with numbers, names, and dates — and to see where it leads next.

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1. Before the police: ganja in daily life, not in sensation

Cannabis did not arrive in Thailand with the dispensaries of the 2020s. It came earlier — and under a different cultural name.

The local word ganja (กัญชา) is tied to the Indian trade and cultural corridor; etymologically it descends from a Sanskrit root that traveled with people, goods, and medical knowledge across South and Southeast Asia. In Thai daily life the plant figured not as a lifestyle brand, but as a household and medicinal object: in food, in folk recipes, in practices meant to relieve pain and fatigue.

A survey of literary and historical sources in the Journal of Thai Traditional and Alternative Medicine offers a sober picture: cannabis appeared in Thai everyday life, but did not occupy a central ritual place — unlike sacramental ganja among Rastafari, whom we wrote about separately. What is more, even then its consumption was associated mainly with lower social strata, and Thai society tended to treat it as “the bad habit of a bad person.”

This matters to record before any laws enter the story, because prohibition rarely erases a plant from reality. It rewrites the room in which you are allowed to speak about it. Before the policing of the twentieth century, cannabis in Thailand belonged more to the kitchen and the apothecary table than to the crime blotter.

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2. 1934 and 1979: how the plant became Category 5

The first dedicated law was the Cannabis Act B.E. 2477 (1934). It prohibited cultivation, possession, import, export, sale, and distribution of cannabis, as well as ownership of smoking paraphernalia, while leaving narrow exceptions for research and medicine. It did not appear in a vacuum: Thailand was a party to the international opium convention of 1912, and the logic of global control reached down to the local plant.

The decisive framework came with the Narcotics Act B.E. 2522 (1979). Cannabis and hemp were placed in Category 5 — a class of plant-based narcotics carrying criminal penalties for production, trade, and consumption. The medical exceptions of the older law were effectively rolled back. For four decades the plant lived in the room where police and penal logic dominate.

Here it helps not to romanticize the past. Twentieth-century Thailand lived simultaneously with traditional knowledge of the plant and with a hard prohibition apparatus. A grandmother’s recipe and a prison statute could coexist in one country — until the state decided which language would prevail in official documents.

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3. Thai Stick: Thailand was already a legend — only an illegal one

Long before 2022, the country already had a global cannabis reputation.

During the Vietnam War era, American servicemen, regional bases, and leave in Thailand encountered a local form of preparation: Thai Stick — flower buds tightly bound around a sliver of bamboo. The share of U.S. military personnel who had tried marijuana rose from roughly 12% in 1966 to about 46% by 1970. One DEA agent later called the Thai “sticks” “the Cuban cigar of the marijuana world”: five for a dollar, seedless, and stronger than anything then growing in America — years before Californians mastered sinsemilla technique.

Historians Peter Maguire and Mike Ritter, in Thai Stick (Columbia University Press, 2013), reconstructed this market through hundreds of interviews: from farmer networks in Isan to the surfer-smuggling economy of the Pacific. By the 1970s and 1980s Thailand was one of the world’s largest illegal exporters of cannabis, until pressure from the DEA and Thai police broke the route.

This chapter is not here for romance. It explains a structural fact: the export smuggling channel out of Thailand is not an invention of the 2020s. It is an old track that, as we will see in chapter 8, opens again the moment a surplus harvest appears.

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4. 2018–2021: medicine first, then the kratom precedent

The modern turn did not begin with recreation. It began with a medical frame.

The practical hinge was Narcotics Act (No. 7) B.E. 2562, which entered into force on 19 February 2019: Thailand became the first state in Southeast Asia to legalize cannabis for medicine and research through a licensing system. The plant remained in Category 5. In December 2019 the ministries of public health and justice signed a memorandum on revising the status of cannabis and kratom.

Alongside it ran kratom (Mitragyna speciosa) — a plant with deep southern Thai tradition. On 24 August 2021, amendment (No. 8) removed it from Category 5, explicitly on the grounds that kratom consumption is part of Thai cultural norm and that the plant is absent from the UN Single Convention.

That was an important precedent: the state showed that Category 5 is not an eternal cage, but a political choice that can be reversed if the plant is rewritten in the language of culture, medicine, and economics. Cannabis was next in line.

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5. 9 June 2022: the gesture before the architecture

On 9 June 2022, cannabis ceased to be a Category 5 narcotic. Anutin Charnvirakul had signed the relevant notification as early as 8 February; it took effect in June. Thailand became the first country in Asia to take that step.

The scale of the day was demonstrative. The government announced the distribution of one million seedlings to households. Cultivation registration ran through the PlookGanja app — nearly 100,000 people signed up in the first days. About 4,200 prisoners held on cannabis-related charges were released. The health ministry had already approved 1,181 products containing extracts and forecast an industry worth 15 billion baht (roughly $435 million) by 2026. In the queue outside a Bangkok shop stood 24-year-old Rittipong Dachkul, who had been waiting since the previous evening: “Now we can find it easily, we don’t have to worry about the source — but I have no idea about the quality.”

The last sentence proved prophetic.

It is more accurate to speak of decriminalization through delisting than of a Canadian or Uruguayan model of recreational legalization. The distinction is not academic — it explains almost everything that happened next. Extracts containing THC above 0.2% remained under narcotics control. Smoking in public could still violate public-health rules. And there was no comprehensive law on how the market should work — parliament was still debating bills.

Professor Sarana Sommano of Chiang Mai University formulated the problem in those same days with near-clinical precision: “Cannabis is no longer considered a narcotic, but there are no ministry rules and norms governing its use. There is no mention of limits on consumption, or of drug-impaired driving laws.”

This was not a press-release slip. It was the structure of the policy: gesture first, architecture later. And everything else entered the gap between them.

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6. 2022–2025: green rush, price collapse, and an overstocked warehouse

For the next three years Thailand lived as a laboratory of accelerated market growth.

Numbers serve better than metaphor. By the end of 2025 the country counted 18,517 cannabis-related establishments — from serious licensed operators to storefronts answering tourist demand. The industry was valued at roughly $1.2 billion. In Phuket, Bangkok, Pattaya, Chiang Mai, and on the islands, including Koh Samui, a green-leaf sign became as much a street fixture as a massage parlour.

Then the economics kicked in — economics that few had built into the optimistic forecasts of 2022.

The seedling giveaway and easy entry into cultivation created a surplus of supply. The domestic market, limited by tourist traffic and the absence of export channels, could not absorb it. Flower prices collapsed. Farmers who had entered the sector under the promise of “gold” found themselves with a harvest they could not move at a profitable price.

And then the old track from chapter 3 reopened — only now from legal fields.

Britain’s National Crime Agency seized 26.9 tonnes of cannabis from air passengers in 2024, against roughly 5 tonnes the year before, and more than 28 tonnes in 2025. Courier arrests at British airports rose from 142 in 2023 to 801 in 2024 and 976 in 2025 — and at one point about half of such arrests led back to Thailand. The country became the largest source of cannabis imported into Britain by air.

The recruitment scheme was cynical: organizers on Telegram offered a free holiday in Thailand in exchange for a package in luggage on the return trip. The British embassy issued warnings not to carry other people’s parcels.

The joint Chaophraya operation (UK Home Office and Thai Customs, launched in July 2024) cut postal shipments of cannabis from Thailand to Britain by 90% in the first quarter of 2025 and led to the arrest of more than 50 British nationals in Thailand. But routes reconfigured: Hanover customs uncovered a maritime corridor, seizing 1.2 tonnes worth more than $13 million, hidden in containers of building materials; Indonesian authorities in East Java confiscated 3.37 tonnes of Thai flower and detained twelve people.

“The illegal export of cannabis is one of the criminal activities of transnational organized networks,” stated Phanthong Loykulnanta, director-general of Thailand’s Customs Department.

In parallel, internal statistics accumulated on which advocates of tightening relied: Thai publications cited data showing cannabis poisoning cases rising by roughly 3.5 times and addiction-related presentations by nearly 6.5 times compared with the period before 2022.

The political conclusion wrote itself: the country began to be called the weak link. The answer came in the summer of 2025.

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7. June 2025: not a return to Category 5, but a different cage

From 26 June 2025, cannabis flower has lived in a new legal grammar. The order was signed by Public Health Minister Somsak Thepsuthin — a figure from the Pheu Thai government, that is, from the political camp opposing Anutin’s Bhumjaithai.

The key move: flower was designated a controlled herb (สมุนไพรควบคุม) under the Protection and Promotion of Thai Traditional Medicine Knowledge Act B.E. 2542 (1999). The administrator is the Department of Thai Traditional and Alternative Medicine (DTAM) under the Ministry of Public Health. Operator reporting runs through forms Phor.Tor. 27, 28, and 29 (source, use, inventory). Purchase requires a PT 33 prescription from a licensed practitioner, valid for no more than 30 days. Advertising, online sales, and vending machines are prohibited; on-site consumption is too.

Here is the main thing lost in short summaries:

Flower was not returned to Category 5. It was moved onto the traditional-medicine track — a “lighter” legal lane with fines on the order of 20,000–25,000 baht and short-term imprisonment (source estimates range from three months to one year), rather than narcotics statutes where sentences are measured in years.

That was a deliberate institutional choice. Somsak, meanwhile, publicly promised to return cannabis to the narcotics list and dismissed Bhumjaithai’s rival control bill as “a daydream.” The threat receded only after Bhumjaithai left the coalition, the Constitutional Court removed Paetongtarn Shinawatra in August 2025, and Anutin became prime minister on 7 September 2025.

Thus arose the two-track system still in force today: flower as a controlled herb under traditional medicine; extracts above 0.2% THC still Category 5 under the Narcotics Code, with a separate, stricter regime.

June 2025 therefore cannot be described as “banned again.” More accurately: the room was rewritten — from tourist storefront to medical-administrative space.

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8. The state of play in August 2026: what actually applies

The market is shrinking on a licence-expiry schedule

According to DTAM, of 18,517 establishments, 7,131 closed after failing to renew their licence in 2025. About 11,386 remain legally active.

But the interesting part is not the remainder — it is the mechanics. In 2025, 8,636 licences expired; only 1,339 were renewed, or 15.5%. That is the figure behind headlines saying “only 15% of shops remain”: the reference is not to the share of survivors out of the total, but to the share of successful renewals. Further waves lie ahead: 4,587 licences expire in 2026 and 5,210 in 2027.

In other words, market contraction is programmed by the calendar, not by a one-off raid.

Requirements are tightening

On 30 April 2026, the Royal Gazette published Ministerial Regulation No. 2 B.E. 2569. It requires flower-licence applicants to hold medical, pharmaceutical, or folk-healer credentials; dedicated elevated storage; odour and smoke control systems; and DTAM-trained staff present during all operating hours. A licence cannot be renewed if the holder was previously suspended for breaching controlled-herb rules.

DTAM deployed a geoinformation system, MC-GIS: a map of legal outlets and cultivation plots through which anyone can verify whether a shop is licensed.

From 17 June 2026, a customs penalty applies to export: 30,000 baht for every kilogram a traveller attempts to take out, and up to two years’ detention for non-payers.

Enforcement is no longer paper-only

From October 2025 through early August 2026, inspectors checked 1,326 shops, carried out 83 seizures, suspended 84 licences, opened proceedings against 40 individuals and businesses, and reviewed 39 appeals. Product worth more than 109 million baht was seized.

Public Health Minister Pattana Promphat summed up the line in four words: “Cannabis is for medical use only.”

The law is still unfinished

On 21 July 2026, DTAM under Dr Pongsathorn Phokphermdee handed the minister a completed draft of the Cannabis and Hemp Control Act (พ.ร.บ.ควบคุมกัญชา กัญชง). It creates a national cannabis committee chaired by the public health minister, introduces three-year DTAM licences for cultivation, production, import, export, and sale, prohibits sales to persons under 20, to pregnant and breastfeeding women, trade near temples, schools, dormitories, and parks, and bans advertising of flower, resin, and smoking devices.

But cabinet, two parliamentary readings, and publication in the Royal Gazette still lie ahead — at minimum several more institutional stages. For now the country governs cannabis through a patchwork of ministerial notifications and regulations, not a single statute.

What people most often get wrong

Common claim	What actually applies
“Cannabis is fully illegal again in Thailand”	Flower did not return to Category 5; it is in controlled-herb, medical-only mode
“Like 2022–2024: walk in and buy”	A local PT 33 prescription, valid up to 30 days, is required
“My medical card from another country will work”	Thailand recognizes only prescriptions issued under its own framework
“Extracts and flower are the same thing”	Above 0.2% THC is a separate narcotics track
“One law will settle everything”	The act is not yet passed; a patchwork of regulations applies
“Only 15% of shops remain”	15.5% is the share of renewed licences in 2025, not the share of operating outlets

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9. Where this is heading: three scenarios and one paradox

The Anutin paradox

The most interesting thing in Thailand’s 2026 story is not the regulations — it is the figure at the top.

Anutin Charnvirakul personally signed the order that removed cannabis from the narcotics list in 2022. He distributed a million seedlings and called the plant gold. In September 2025 he became prime minister, dissolved parliament in December, and in the March 2026 election his Bhumjaithai came first, winning about 200 seats.

And it is under him that cannabis is being driven into a medical frame.

What is more, in early July 2026, after a wave of international seizures, Anutin publicly entertained a 180-degree turn for the first time: “No matter how strict our measures are, if people can still smuggle drugs out, we need to go back and reassess our approach.” He added that he must not allow “other countries to blame Thailand for being the weak link,” and stated his readiness to shut down the industry if harm outweighed benefit. Bhumjaithai’s senior legal adviser Supachai Jaisamut, in those same days, insisted the party had always meant medical use only.

This is better understood not as hypocrisy, but as a diagnosis: Thailand’s cannabis policy follows control of the health ministry and external pressure, not public opinion. Under Pheu Thai governments the line was reversal; under Anutin it is regulated medicine instead of the full prohibition opponents demanded. But the international smuggling scandal presses on both positions at once.

Scenario A: the act passes, the market becomes clinical

The most likely trajectory. The Cannabis and Hemp Control Act clears cabinet and parliament, patchwork notifications are replaced by a single statute, and shops renewing licences are converted into medical facilities. DTAM speaks of a three-year transition period for adaptation.

The economic logic of that transition is harsh: a storefront built for tourist traffic must become a clinic serving real patients. Many will not survive. According to Prohibition Partners, as of November 2025 the country had 11,814 licensed operators but only 149 farms with GACP certification — that is, meeting standards at which pharmaceutical quality and export become credible. The gap between those two numbers is the scale of the coming shakeout.

Scenario B: relapse — return to Category 5

Less likely, but already spoken aloud by the prime minister himself. The trigger will be external, not internal statistics: new major seizures of Thai cannabis in Europe and Asia, diplomatic pressure, the “weak link” reputation. For operators that would mean not margin compression, but criminal rupture.

Scenario C: medical export as a second life for the sector

The least discussed — and most underestimated. Thailand has climate, accumulated agricultural competence, and a working medical-tourism industry. The first medical export was 11 kilograms to Australia in 2023; the following year it exceeded one tonne.

The rate of growth is impressive; the absolute figures are not yet. But if GACP-certified farms grow from 149 to several hundred, legal export can absorb the very surplus that today goes into couriers’ suitcases. Paradoxically, a strict medical frame is the only path to legal export: importing countries buy only from certified producers.

The gap no scenario closes

There is, finally, an honest observation from inside the industry. Cannabis advocate Chokwan Kitty Chopaka — the same shop owner who in 2022 said “after COVID the economy is in the drain, we really do need this” — assesses the present without illusions: “No one really follows the official way of making a legal purchase.”

A gap remains between the text of the regulation and street practice. It is the main variable of the coming years: as long as formal rules and actual behavior diverge, advocates of full prohibition will always have an argument.

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10. What this arc says about the politics of a plant

The Thai chronology 1934 → 1979 → 2019 → 2022 → 2025 → 2026 is a rare dense case in which the entire arc fits within one politician’s active career.

Four conclusions follow from it — conclusions that extend far beyond Thailand.

Delisting is not a market. Removing a plant from the narcotics list can be done with one notification. Building a code for quality, age limits, advertising, licensing, driving, and export control is work measured in years. Thailand did the first and postponed the second; everything else became a consequence of that gap.

Export control is not a detail — it is a load-bearing wall. Its absence turned a domestic reform into an international problem. A price collapse inside the country inevitably seeks an exit outward, and if no legal exit exists, an illegal one will be found.

Language matters more than botany. The same plant over four years was “gold,” a “cash crop for farmers,” a “threat to youth,” and a “controlled medicinal herb.” What changed was not biology, but the institution holding the microphone.

Classification is a choice, not nature. The 2025 move is especially telling: the state could have returned cannabis to Category 5 with one stroke, but chose the traditional-medicine regime instead. A softer track is still a cage — simply a smarter one.

Place our article on Reefer Madness and Harry Anslinger beside this one and you see a mirror. There, fear compressed the plant into one category and held it for nearly a century. Here, the state first expanded the category — then, finding that a market without architecture drifted into smuggling, assembled a new frame: thinner, more medical, but no softer in intent.

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11. Why read this on the LIBRARY shelf

We live and work on Koh Samui, and the island is subject to the same national rules as the rest of the country: no local exemptions and no local extra tightening. So the only thing that makes sense to offer a reader here is not a slogan, but a map.

For a tourist, the map explains why the picture “Thailand legalized” from 2022 no longer describes 2026. For a resident, why apothecary and traditional rhetoric became the main official language again. For a market operator, why GACP certification and the licence-expiry calendar matter more now than storefront design. For everyone else, why cannabis in Thailand was never simply a seasonal product: it carries domestic memory here, prohibition memory, the smuggling memory of the Thai Stick era, and now the memory of a political experiment that is still not closed.

At LIBRARY we prefer that kind of conversation: the plant as a chapter, not as hype. And if one thought is worth carrying away from this chronicle, it is this: the most unstable thing in Thai cannabis is not the plant or the market, but the frame in which they were agreed to be seen. It changed four times in eight years and will keep changing. Read the current edition, not the headline from three years ago.

On the shelf beside this piece lie materials on the machinery of fear around marijuana, on why hemp disappeared from the textbooks, on the etymology of the word ganja, as well as the FAQ and catalog.

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Sources

• Reuters — Thailand legalises growing, consumption of marijuana (9 June 2022)

• CBS News / AP — Thailand becomes 1st Asian nation to largely legalize marijuana

• AP News — Veteran Thai politician who helped legalize cannabis becomes the new prime minister

• South China Morning Post — Thai PM warns may 'shut down' cannabis industry after global smuggling spike (6 July 2026)

• Business of Cannabis — Thailand Presses Medical-Only Cannabis Bill Toward Cabinet as Enforcement Drive Widens (4 August 2026)

• Nation Thailand — Public Health Ministry tightens cannabis controls with GIS mapping

• Nation Thailand — Thailand to force cannabis shops into medical model as numbers plunge

• Juslaws — Ministerial Regulation No. 2 B.E. 2569 (Royal Gazette, 30 April 2026)

• Cannabis for Thailand — The 'Controlled Herb' Framework Explained

• Legal500 — Thailand's Legal Reversal on Cannabis: Restriction to Medical Use Only

• CNN Travel — What travelers to Thailand need to know about legally buying cannabis

• Cannavigia — Cannabis History in Thailand

• Journal of Thai Traditional and Alternative Medicine — Marijuana in the Thai Way of Life

• Peter Maguire & Mike Ritter — Thai Stick: Surfers, Scammers, and the Untold Story of the Marijuana Trade (Columbia University Press, 2013)

• Cannabis Act B.E. 2477 (1934); Narcotics Act B.E. 2522 (1979); Narcotics Act (No. 7) B.E. 2562 (2019); Narcotics Act (No. 8) B.E. 2564 (2021)

• Protection and Promotion of Thai Traditional Medicine Knowledge Act B.E. 2542 (1999); MoPH notification on controlled herbs (cannabis), in force from 26 June 2025

This material is for informational purposes only and does not constitute legal or medical advice. Cannabis regulation in Thailand changes through ministerial notifications and regulations and, at the time of publication, is not consolidated in a single statute. Before taking any action, verify current requirements with Thailand’s Ministry of Public Health and DTAM. Data are current as of August 2026.