Law and prescriptions
Thailand Cannabis Law 2025: Prescription Rules | Siam Green
July 2025: Thailand’s New Cannabis Regulations
By Siam Green · 16 July 2025 · Updated 29 June 2026
Big changes are rolling through Thailand’s cannabis landscape. As of June 2025, the government has reclassified cannabis as a controlled substance, meaning you’ll now need a doctor’s prescription to legally purchase or consume it.
For many of us who have embraced the plant’s benefits, this sudden shift feels frustrating, confusing, and even disheartening. But rather than panic, this is a moment to adapt, organize, and elevate the conversation.
Here’s everything you need to know, and how Siam Green is stepping up.
What’s Changed?
Thailand, once hailed as Asia’s cannabis pioneer, has implemented new rules that restrict access to cannabis products unless they’re medically prescribed. Key updates include:
- Prescriptions required: Only certified healthcare professionals (doctors, pharmacists, dentists, and traditional healers) can issue a prescription for cannabis use, valid for up to 30 days. Siam Green can issue you these through our in house doctors at each branch.
- Strict dispensary compliance: Shops must now operate as medical dispensaries, complete with certified staff and controlled inventory tracking. All cannabis flower must be purchased from licensed cannabis facilities with quality certificates such as GACP or GAP.
- Something that hasn’t changed but needs to be re-emphasized: Smoking in public remains illegal! Please be responsible and do not smoke around public areas, or groups of people.
What This Means for You
If you’re a long-time medical user or a conscious canna-curious newcomer, this means one thing: you’ll need a prescription to continue your cannabis journey, legally and safely.
That may sound intimidating, but here’s the good news:
Siam Green Has You Covered
We believe in safe, informed, and responsible access to cannabis. That’s why all Siam Green branches now have in-house medical professionals ready to consult and issue prescriptions directly, so you can continue your cannabis journey without stress or stigma.
What you’ll find at Siam Green:
Licensed doctors on-site for consultations and prescriptions
Products sourced from approved, pharmaceutical-grade growers
Guidance on the correct use, dosage, and strain for your needs
Transparency and traceability for every product on our shelves
Staying Informed: Join the Thailand Cannabis Network (TCN)
We’re stronger together. That’s why we’re proud to support and collaborate with the Thailand Cannabis Network (TCN), a community-led movement dedicated to sharing accurate information, policy updates, and education on cannabis in Thailand.
In a time of misinformation and uncertainty, building a strong and well-informed community is more important than ever. When we stay connected, we empower each other to understand, comply, and thrive within this new legal landscape.
If you’re a patient, advocate, or just canna-curious, TCN is your hub to:
Stay ahead of policy changes
Join advocacy efforts
Connect with experts and allies
Help shape the future of cannabis in Thailand, responsibly
Gain clarity, share pain points, and get access to the right people during times of need
Visit www.tcnetwork.me to sign up!
The Path Forward: Adaptation, Not Resistance
We may be entering a new era for cannabis in Thailand, but it doesn’t have to be the end of progress. In fact, it’s an opportunity to reshape the conversation from one of casual recreation to one of intentional, informed, and respectful use.
At Siam Green, we’re committed to helping you:
Understand the rules
Access the right resources
Build community
And most importantly: continue your journey with cannabis safely and confidently
Let’s move forward, together, informed, and empowered.
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- Siam Green Chinatown on Google Maps Bangkok Reviews
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How to Get a Medical Cannabis Prescription in Thailand | Siam Green
Medical cannabis in Thailand
How to get a medical cannabis prescription in Thailand
Cannabis is legal in Thailand for medical use only, and every purchase needs a valid prescription on the Thai form ภ.ท.33, written "PT 33" in English. Here is what the prescription is, who can get one, and how the visit works, whether you live here or you are visiting.
This page is general information about the Thai medical-cannabis framework, not medical advice. Whether cannabis is right for you is a decision for the licensed practitioner who assesses you.
Find your nearest branch
What the ภ.ท.33 (PT 33) prescription is
Cannabis flower is a controlled herb under Thai Ministry of Public Health rules. It is legal for medical use only, and to buy it you need a valid medical-cannabis prescription on form ภ.ท.33. A licensed practitioner issues the prescription, and it is valid for up to a 30-day supply.
Who can get one, visitors included
Anyone aged 20 or older can be assessed, visitors from outside Thailand included. The decision rests entirely on the practitioner's medical assessment during your consultation. Prescriptions and medical cards from other countries are not valid in Thailand, so you are assessed here. Carrying cannabis across the border in either direction is prohibited.
How the visit works
- Walk in to any Siam Green branch during opening hours and speak with the team. No appointment is needed.
- A licensed practitioner runs a short consultation and assessment on site.
- If cannabis is medically appropriate for you, the practitioner issues your ภ.ท.33 (PT 33) prescription, valid for up to a 30-day supply.
What to bring
- A passport or photo ID.
- Proof you are 20 or older, which your passport or ID covers.
- Nothing from home is required. A prescription or medical card from another country is not valid here anyway.
Rules worth knowing while you are here
- Public consumption is prohibited and can lead to fines.
- Keep everything in its original labelled packaging, together with your prescription.
- Do not carry cannabis across the border in either direction.
Questions
Prescription FAQ
Do tourists need a prescription too?
Yes. Everyone needs a valid ภ.ท.33 prescription from a licensed practitioner in Thailand, visitors included. Your passport works as your ID.
How long does the consultation take?
It is short. A licensed practitioner assesses you on site and, if cannabis is appropriate for you, issues the prescription during the same visit.
How long is the prescription valid?
For up to a 30-day supply.
Can I use a prescription or medical card from my home country?
No. Only a prescription from a licensed practitioner in Thailand is valid here.
Do I need to book ahead?
No. Walk in during opening hours at any branch and the team will guide you.
Start at your nearest branch.
A licensed practitioner can issue your ภ.ท.33 on site. Walk in during opening hours, bring your passport, and the team will take it from there.
Phrom Phong → Silom → Nana → Chinatown → Chaweng →
Questions first? Call (+66) 096 893 0545, chat on LINE, or email [[email protected]](https://siamgreenco.com/cdn-cgi/l/email-protection#cca5a2aaa38cbfa5ada1abbea9a9a2afa3e2afa3a1).
กรกฎาคม 2025 กฎกัญชาใหม่ของประเทศไทย ทีมงาน Siam Green อธิบายแบบเข้าใจง่าย · Siam Green
กรกฎาคม 2025 กฎกัญชาใหม่ของประเทศไทย ทีมงาน Siam Green อธิบายแบบเข้าใจง่าย
โดย Siam Green · 16 กรกฎาคม 2568 · อัปเดตล่าสุด 10 พฤษภาคม 2569
สวัสดีครับ ผู้มาเยือนของ Siam Green Cannabis Co มีการเปลี่ยนแปลงสำคัญในวงการกัญชาของประเทศไทย ตั้งแต่เดือนมิถุนายน 2025 เป็นต้นไป รัฐบาลจัดให้กัญชาเป็นสารควบคุม การซื้อและการใช้อย่างถูกกฎหมายต้องมีใบสั่งแพทย์ตามระบบ ภ.ท.33 (PT 33) เท่านั้น
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