Thailand's 2026 Crackdown on Fake PT 33 Cannabis Prescriptions

Thailand’s Ministry of Public Health has launched a crackdown on forged PT 33 medical-cannabis prescriptions after investigators uncovered identity fraud and the online sale of fake documents used to buy cannabis for recreational use. The scheme is simple: sell someone a counterfeit prescription so they can walk into a shop and buy flower they were never medically cleared to hold. The enforcement response is not subtle, and it leaves every patient — and every tourist — needing to know what a real PT 33 looks like.

This guide explains what the PT 33 form is, who is legally allowed to issue one, and how to tell a legitimate prescription and clinic from a fake before you hand over money or unknowingly break the law. For the wider legal picture, start with our Thailand cannabis law overview and medical cannabis overview.

What happened

Officials found fraudsters forging PT 33 forms and selling them online as standalone documents. Some cases involved identity fraud — using a real patient’s or a fabricated practitioner’s details to make the paperwork look authentic. Buyers then used the fakes to obtain cannabis flower for recreational purposes, sidestepping the medical-only system Thailand built when it reclassified cannabis flower as a controlled herb.

In parallel, authorities are cross-checking outlets against DTAM’s public registry of licensed shops and clinics, which lists GPS coordinates and licence-expiry dates for each one. A shop that does not appear on that registry is treated as unregistered, and a prescription “issued” through an unregistered outlet is a warning sign on its own.

What a PT 33 actually is

The PT 33 form (แบบ ปท. 33) is Thailand’s official medical-cannabis prescription. Since 26 June 2025, when cannabis flower became a controlled herb sold on a medical-only basis, you need one to buy flower or any product above 0.2% THC.

A genuine PT 33:

• Is issued only after an in-person or legitimate telemedicine consultation with a licensed Thai practitioner
• Is valid for up to 30 days
• Is commonly capped at around 30 grams per month
• Specifies the strain, dosage, and treatment duration
• Names a DTAM-certified prescriber and ties the prescription to a licensed outlet

It is a clinical document that comes out of a consultation, not a product you can buy on its own. Any website offering to sell you “a PT 33” with no consultation attached is selling a fake.

Real PT 33 vs fake

Who can legally issue a PT 33

A PT 33 must be signed by a DTAM-certified prescriber. Only seven categories of practitioner qualify, and each must hold DTAM cannabis-prescribing certification:

1. Medical doctors
2. Thai traditional-medicine practitioners
3. Applied Thai traditional-medicine practitioners
4. Traditional Chinese-medicine practitioners
5. Pharmacists
6. Dentists
7. Licensed folk healers

If the person prescribing your cannabis does not fall into one of these seven categories, the prescription is not valid. Veterinarians can authorise cannabis for animals under separate rules, but never for people.

How to check the clinic before you trust the prescription

A real prescription comes from a real, licensed outlet, so verify the source before you accept one:

• Look the shop or clinic up on DTAM’s public registry. Legitimate outlets are listed with GPS coordinates and a licence-expiry date. If it is not there, treat it as unregistered.
• Confirm there is a licensed practitioner on site. Since the shift toward clinics and pharmacies, cannabis should be dispensed by a qualifying practitioner, not a counter clerk.
• Be wary of anything sold purely online. A legitimate telemedicine consultation with a licensed Thai practitioner can be valid, but a website selling prescription PDFs with no consultation is exactly the fraud being targeted.

For a step-by-step walkthrough, see our guide on how to check whether a Thai cannabis shop is licensed on the DTAM registry.

A quick checklist for patients and tourists

Before you buy, run through this:

• Did a real consultation happen? A genuine PT 33 follows an in-person or legitimate telemedicine assessment.
• Is the prescriber one of the seven certified types? Ask; a real practitioner will answer plainly.
• Is the outlet on the DTAM registry? Check the GPS and licence-expiry details.
• Does the form specify strain, dosage, and duration? Blank fields are a warning sign.
• Is it within limits? Up to 30 days, commonly around 30 grams a month.
• Were you handed the document with no consultation at all? That is the classic fake.

The penalties, kept separate

Buying or using cannabis without a valid prescription carries penalties. Possessing or purchasing without a valid prescription has been reported at up to a 25,000 THB fine and up to three months’ imprisonment. Treat that figure as reported rather than settled: the widely cited 25,000 THB penalty is firmly established for public smoking and public-nuisance offences under the Public Health Act 1992, and its application to possession without a prescription is less clearly fixed.

That is a separate matter from selling cannabis without a licence, which carries its own penalty of up to one year in prison and a 20,000 THB fine under the Traditional Medicine Act. Do not treat these as a single combined punishment; they are distinct offences.

What this means for tourists

Tourists are the easiest targets for prescription scams, because they are least familiar with the system and most likely to be offered a shortcut. A legitimate telemedicine or in-person consultation with a licensed Thai practitioner can produce a valid PT 33, so tourists are not shut out — but the document has to come from a real consultation at a registered outlet, never from a pop-up website or a tout outside a shop.

If you are visiting, read our guide on whether tourists can buy cannabis in Thailand in 2026 and the broader medical cannabis guide before you travel. Our explainer on the dispensary-to-clinic conversion mandate also sets out why more sales now happen at clinics with a practitioner on site.

This article is general information, not legal advice. Cannabis rules in Thailand are changing quickly. Verify current requirements with DTAM or a qualified professional before making medical or travel decisions.