Medical Cannabis Prescription in Thailand: PT33 Guide

Medical Cannabis Prescription in Thailand: The Complete PT33 Guide

Cannabis is legal in Thailand nationwide — but only as a regulated medical product, and only with a valid prescription called a PT33. Here's how the national system actually works, what's changed recently, and what it means in practice wherever you're visiting.

How Thailand's Cannabis Law Got Here

The practical takeaway: cannabis didn't become illegal again — it became medical-only, everywhere in Thailand, not just in tourist areas.

What a PT33 Actually Is

A PT33 is the official form documenting a licensed doctor's medical assessment and approval for an individual to purchase cannabis flower in Thailand. It applies equally to Thai residents and foreign visitors — there's no nationality requirement. Once issued, it's valid for 30 days and works at any licensed dispensary nationwide, including for travel between islands or cities.

How the Process Works, Nationally

A few details that apply nationwide, not just locally:

What's Legal Nationwide (and What Isn't)

Legal: buying cannabis flower from a licensed dispensary with a valid PT33; consuming on licensed premises or in private; CBD products under 0.2% THC (no prescription needed); cannabis-infused food and drink from licensed venues.

Illegal, anywhere in the country: public consumption (including on beaches and in parks — actively enforced, with real fines); buying without a prescription from unlicensed sellers; crossing any Thai border with cannabis, in either direction; sales to anyone under 20; driving under the influence.

How Koh Samui Fits Into the National System

Everything above applies the same way on Koh Samui as anywhere else in Thailand — there's no island-specific exception. What differs locally is simply where you go to complete the process. Magical Garden in Fisherman's Village, Bo Phut, helps visitors with the logistics: a telemedicine consultation, or a connection to a trusted local partner clinic nearby. See our Koh Samui–specific PT33 guide for the exact local process, or our guide to spotting a genuine vs. rubber-stamp consultation if you want to understand what a legitimate process should look like anywhere in Thailand.

Frequently Asked Questions

Q: Is medical cannabis legal throughout Thailand, or just in tourist areas?
A: Nationwide. The PT33 medical framework applies the same way everywhere in the country — there's no regional exception.

Q: Can tourists get a PT33, or is it only for Thai residents?
A: Tourists can get one too — there's no nationality requirement. You'll need a passport and must be at least 20 years old.

Q: Does a foreign medical marijuana card work in Thailand?
A: No. Foreign medical cannabis cards have no legal effect in Thailand — a PT33 issued by a Thai-licensed doctor is required regardless of what you hold at home.

Q: How long is a PT33 valid, and does it work island-wide or just where I got it?
A: A PT33 is valid for 30 days and works at any licensed dispensary in Thailand, including for travel between islands or cities.

Q: What changed in Thailand's cannabis law most recently?
A: April 2026 brought stricter, cannabis-specific licensing requirements for dispensaries — many non-compliant shops closed as a result. A full Cannabis and Hemp Act remains in consultation as of mid-2026.

Visiting Koh Samui specifically? See our local PT33 guide for exactly how the process works at Magical Garden, or browse the cannabis menu to see what's currently available. Magical Garden is at 78 Moo 1, Thanon Laan Thong, Bo Phut, Fisherman's Village, Ko Samui, open daily 9 AM to 2 AM. Message us on WhatsApp at +66 98 192 2088 with any questions.