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.