Prescription and eligibility questions visitors ask

Do I need a prescription to buy cannabis flower in Thailand?

Official source

Yes, going by the notices linked at the foot of this page. The Thai Government notice treats cannabis flower as a controlled herb and says retail sale to the general public requires a prescription; the official tourist notice says a visitor needs one that was issued inside Thailand.

Neither text describes a holiday exemption, a tourist quota or a lighter version of the rule for someone who is here for a week. If a page you are reading says otherwise, check the date on it.

What is ภ.ท.33, and why do shops keep mentioning it?

Official source

ภ.ท.33 — transliterated PT 33 — is the controlled-herb prescription form that cannabis flower is dispensed against, and the ministerial regulation of April 2026 keeps the flower tied to it. In practice that is why a counter is looking for one specific kind of paperwork rather than for any letter from any doctor.

Form numbers are administrative and do get renumbered. Ask the clinic to confirm which form it is issuing on the day you are seen, rather than arguing from a forum thread written a year ago.

Who is allowed to write the document, and can you arrange it?

Practical caution — not a legal conclusion

A practitioner registered in Thailand. What a counter cares about is the class of person who signed, not a named clinic, so where you are seen is your choice; what is read afterwards is the document itself, not the route you took to it.

We are a retail counter and not a medical practice. We do not issue this document, we do not book the appointment, and we cannot say in advance what any practitioner will decide. What we can do is look at what you already hold and tell you whether it is the right kind of paper.

Will the paperwork I use at home work here?

Official source

The tourist notice describes a prescription issued in Thailand, and a medical card, a clinic letter or an app screen from another jurisdiction is not that. No counter can convert one into the other, and being asked politely does not change the answer.

This catches out visitors from places where cannabis is ordinary and legal more often than anyone else, because they arrive expecting the document they always use to be read the same way. Plan around it before the flight rather than in a doorway.

Is there an age limit, and is anyone else excluded?

Official source

Twenty. The controlled-herb notice does not permit sale to anyone under 20, and it does not permit sale to a pregnant woman or to a woman who is breastfeeding either. That is the rule as written, not a house policy invented by a shop.

For a visitor the passport is the document that proves age in a form staff can actually read. Expect it to be read rather than glanced at, and expect that to happen on every visit rather than once.

The thirty-day figure — is that an amount I am entitled to?

Official source

No. The government notice limits a prescription to a supply of no more than thirty days. That is a ceiling on what a document may cover — not an entitlement, not a monthly quota, and not a statement about what is on a shelf on a given day.

An individual document can be written narrower than the ceiling. The figure that applies to you is the one on your own paper, not the one in the headline of an article.

A shop offered to sort the paperwork on the spot. Is that normal?

Practical caution — not a legal conclusion

A retail counter is not where that document comes from. It is medical, it names you, and it arrives from a practitioner — the counter reads it, records the sale and hands over the goods.

When someone behind a counter offers to produce the paperwork while you wait, the useful conclusion is about that counter rather than about your chances. Walk out and pick a different door; in a city with several hundred shops that costs you nothing.

Did anything change in 2026?

Official source

On the selling side, yes. A ministerial regulation on licensing the sale and processing of controlled herbs for commercial purposes (No. 2), B.E. 2569, was published on 29 April 2026 and took effect the following day.

It narrows the premises that may hold the licence to a medical facility, a pharmacy or a registered herbal-products shop, and it requires a person who has completed the official cannabis training to be present the whole time the premises is trading. Nothing in it creates an exemption for foreign visitors: the prescription requirement and the supply limit stand as the 2025 notice wrote them.

Do these answers cover oils and edibles as well as flower?

Not confirmed — we have no verified source

Everything on this page is written about cannabis flower, and that is the limit of what we will state. Other preparations of the plant sit under rules we have not read in an official text, so we do not describe them here.

A confident answer would be worth less to you than an honest gap: it is exactly the kind of sentence that gets copied into a hundred travel pages and then quoted back at an officer. Ask the practitioner who writes your document, and read the primary sources linked at the foot of this page yourself.

Where these answers come from

Thai Government notice (17 July 2025)Official Thailand tourist noticeMinistry of Public Health guidance on the 2026 ministerial regulation (Thai)