Licences and rules
Who can write a PT.33 prescription: the seven prescribing professions
Thailand Cannabis Report · Reefers Club Co., Ltd. · Last checked 31 October 2026
Since 26 June 2025, every lawful sale of cannabis flower in Thailand rests on one piece of paper: a PT.33 prescription. The shop does not issue it. A qualified practitioner does, and only seven professions qualify.
The seven prescribing groups
Under the Notification on Controlled Herb (Cannabis) B.E. 2568 (2025), a PT.33 must come from a member of one of these groups: Verified
- medical practitioners
- dentists
- pharmacists
- Thai traditional medicine practitioners
- applied Thai traditional medicine practitioners
- Chinese medicine practitioners
- folk healers
DTAM has also run prescriber training. Whether training is a legal precondition to prescribing is not stated in any public source we have found. Estimated
Who is not a prescriber
The DTAM-trained worker every licensed shop must have on duty is not a prescriber. That worker is a licence condition under Ministerial Regulation No. 2. See the DTAM-trained worker rule. Shop owners and sales staff cannot write a PT.33 either, unless they are themselves members of a prescribing group.
What a shop must check
- The prescription is on the PT.33 form and issued by a member of one of the seven groups.
- It names the buyer and the quantity, and the sale stays within it.
- The evidence is kept at the shop for inspection.
- The prescription is genuine. On 27 June 2026 the Ministry ordered enforcement against forged and traded PT.33 forms and said it would trace prescriptions to the issuing practitioner. Verified
The cost of getting it wrong
The penalty guideline announced on 22 June 2026 makes a sale without a PT.33 a 90-day suspension, and selling to barred buyers without one is revocation. Estimated A suspension on the record also lets the authority consider refusing renewal. See suspension vs revocation.
Section 3 of the report, free to read, covers the prescriber pool and the rules around it.
Sources
- Section 3 of the 2026 report, The rules in force (free to read)
- Thairath, DTAM guideline on administrative orders for cannabis shops, 22 June 2026
- Juslaws, Amendment to cannabis law on 25 June 2025
- The Star (Bernama), Thailand to tighten cannabis controls and propose tougher penalties, 22 October 2026
This article is market intelligence, not legal, tax or immigration advice. Rules change by notification; check the current text with the relevant authority or Thai counsel before you act.
In short
What is a PT.33?
The prescription form for cannabis flower under the 2025 controlled-herb notification. Every flower sale needs one since 26 June 2025.
Who can issue a PT.33?
Members of seven prescribing groups: medical practitioners, dentists, pharmacists, Thai traditional medicine, applied Thai traditional medicine and Chinese medicine practitioners, and folk healers.
Does the shop's trained worker count as a prescriber?
No. The DTAM-trained worker every shop must have on duty is a licence condition, not a prescriber.
Are forged prescriptions a problem?
Yes. On 27 June 2026 the Ministry ordered enforcement against forged and traded PT.33 forms and said it would trace prescriptions to the issuing practitioner.
What happens if a shop sells without one?
Under the guideline announced on 22 June 2026, a sale without a PT.33 is a 90-day suspension.
Want the numbers behind this?
This article gives you the argument. The figures, where they come from and how sure we are of each one are in the report.