Cannabis in Thailand was illegal, then it was legal, now it’s a grey area.
A quick history
Before 2022, cannabis in Thailand was treated as any other narcotic, Category 5 under the old Narcotic Act, alongside opium. Getting caught with hash or weed could mean real prison time, and it wasn’t an empty threat, people did serious sentences for it.
Then in June 2022, Thailand became the first country in Asia to decriminalise it entirely, pulling cannabis off the narcotics list altogether. What followed was a genuinely wild couple of years: over 18,000 cannabis shops opened across the country, it was sold openly on the street in tourist towns, and for most of that period nobody was seriously checking whether you had any kind of medical justification to buy it. It was, in practice, a fully open recreational market.
Where things stand today
That open era is over. In June 2025, the government reclassified cannabis flower as a “controlled herb,” which put it back under medical supervision. As it stands right now, cannabis in Thailand is legal for medical use only. To buy cannabis flower legally you need a PT 33 prescription, issued by a licensed practitioner, and dispensaries are supposed to have that practitioner on site to check it before they sell to you.
CBD products under 0.2% THC sit completely outside all of this and remain legal to buy anywhere, no prescription needed.
Since that reclassification, roughly 7,000 of the original 18,000-plus shops have closed, mostly the smaller operations. Around 11,000 are still trading under the new medical framework.
Getting a medical licence is easy
This is the bit that surprises people: “medical only” sounds like a real barrier, but in practice it isn’t much of one. Dispensaries are still all over the tourist areas, Bangkok, Phuket, Chiang Mai, the islands, and most of them see foreigners specifically. You don’t need a Thai ID or any prior paperwork, just your passport.
You turn up, have a short consultation, and walk out with a PT 33 prescription in about half an hour. It typically costs between 300 and 1,500 THB depending on whether it’s a government or private clinic. The prescription is valid for 30 days and lets you buy from any licensed dispensary in the country, not just the one attached to the clinic.
The list of conditions that qualify is broader than you’d expect, and practitioners have a fair amount of discretion. Things commonly covered include chronic pain, insomnia, anxiety, migraines, muscle spasticity, appetite loss, and nausea. If you’ve struggled with any of that, it’s a straightforward transaction.
The honest bit: how strictly is the new law enforced?
Officially, every legal dispensary is supposed to check your PT 33 before selling you anything. In reality, that’s inconsistent. Plenty of shops, especially outside the handful of areas where enforcement has been visibly stepped up, still sell over the counter without asking any questions, just like before.
That’s genuinely how a lot of the market behaves right now, but it’s worth being clear-eyed about it rather than treating it as a green light: it’s not the legal position, it can vary a lot from shop to shop and town to town, and enforcement has been tightening rather than loosening since the rules changed. Getting the prescription costs you almost nothing in time or money, so there’s not much reason not to just do it properly.
Also, if you want to fly internally with it, you’ll definitely need a licence, and it’s advisable to have one travelling long distances. If you get stopped with cannabis by the police without a licence, you’ll lose it, and pay a fine.
What’s coming next
The current setup runs on a patchwork of ministerial regulations rather than one settled law. A proper Cannabis and Hemp Act has been in the works for a while and finished public consultation in May 2026, but still hasn’t passed parliament. The government said it wants it through before the end of 2026, though that timeline has already slipped before and isn’t guaranteed.
Beyond that, more shop licences are set to expire through the rest of 2026 and into 2027, and current policy is pushing surviving shops to convert into proper medical facilities, pharmacies, or herbal retailers rather than staying as standalone dispensaries. The direction of travel is consistently toward tighter, not looser regulations, so don’t assume today’s picture holds for long.
The bottom line
Cannabis in Thailand right now is medical-only, but the medical route is close to a formality for anyone visiting, cheap, fast, and not gatekept in any meaningful way. Get the PT 33 if you’re going to use it, it takes minutes and means you’re fully legal and can travel around with it stress free. Also, don’t assume the rules you read today will still be the rules next year, this is a law that has completely flipped twice already in under five years.