What Is a PT33 Prescription and How Do You Get One?
A PT33 is the prescription that makes medical cannabis legal to buy in Thailand. It is issued by a licensed Thai practitioner after a genuine consultation for a qualifying condition, is valid for up to 30 days, and is required to buy cannabis flower from a licensed dispensary. Without it, buying cannabis flower is not legal, which makes the PT33 the single most important document in the legal consumer market.
What the PT33 does
The PT33 authorizes a patient to obtain and possess cannabis within its terms. Licensed dispensaries are required to verify it before selling. It is the mechanism that turns the medical-only framework from an abstraction into a working system: no prescription, no legal purchase of flower. It also underpins the possession allowance for patients.
How to get one
You consult a licensed Thai practitioner, in person or through approved telemedicine, and if they identify a qualifying condition, they issue the PT33. Foreign medical records can support the consultation but do not replace it, and a foreign prescription has no standing. The consultation is a real clinical step, not a formality, and the practitioner may decline.
What it does not do
A PT33 does not permit public consumption, which remains illegal regardless of prescription. It does not authorize export. And it does not cover an indefinite period; at up to 30 days validity, it must be renewed through a further consultation. Understanding these limits is as important as having the document.
The Thai medical-cannabis prescription required to buy flower legally.
Up to 30 days.
Consult a licensed Thai practitioner for a qualifying condition.
No. Public consumption remains illegal.
This post gives you the argument. The full method, the figures, and the confidence ratings behind them are in the report. Read a free sample chapter, then decide.
Read the free sample →Three findings from the 2026 edition, free.
Of 8,636 expired dispensary licences, 1,339 renewed. The rest did not bother. That is not a market collapsing. That is a market taking out its own trash.
CertainFewer shops, higher revenue each. The closures removed storefronts, not revenue, because the shops that closed were earning almost nothing. Every desk model read the count and stopped.
LikelyA small minority of shops earn a disproportionate share of all revenue. The bottom half earns a fraction of it. Nobody else has measured this.
LikelyBuilt from 850+ dispensary visits across Thailand, 100+ dispensary owner and operator interviews, 30+ farm owner and operator interviews, and 400+ customer interviews across 40 nationalities. 101 pages. 23 chapters. Every chapter sourced, every figure confidence-tagged.