BANGKOK — 27 June 2026, The Ministry of Public Health has ordered strict enforcement action against the falsification and illegal trading of cannabis prescription forms, known as Phor Thor 33 (ภ.ท.33), after detecting widespread document forgery and online misuse, officials said on 27 June 2026.
The Department of Thai Traditional and Alternative Medicine (DTAM), in coordination with police and security agencies, said it will pursue legal action against individuals, cannabis shops, healthcare facilities and medical professionals involved in the production or use of fake prescriptions.
Authorities said the violations include forged medical certificates and falsified Phor Thor 33 prescriptions used to obtain controlled herbal cannabis products without proper medical diagnosis or consultation.
Deputy DTAM director-general Dr. Thewan Thaneerat said reports showed that forged Phor Thor 33 forms were being sold for recreational cannabis use.
He said some documents contained pre-signed medical practitioner signatures, allowing others to add details and use them as false evidence for official reporting under Phor Thor 28 cannabis usage records.
The ministry has instructed officials to file criminal complaints against offenders. Cannabis shops found using fake prescription forms may face charges of document forgery, while medical professionals involved may also face professional misconduct investigations.
Authorities said offenders could face prosecution under the Criminal Code, along with suspension or revocation of licences. Cases involving licensed professionals will also be forwarded to relevant medical councils for disciplinary action, including suspension or revocation.
Dr. Peera Chookasemkit, director of the Medical Cannabis Division, said future enforcement will be strengthened through digital systems and electronic databases to closely monitor prescription issuance.
He said officials will be able to verify document codes and trace prescriptions back to issuing doctors and medical facilities in real time. Any abnormalities such as duplicate codes, invalid records or mismatched practitioner information will be flagged immediately.
He reiterated that controlled herbal cannabis must only be used under strict medical supervision for legitimate treatment purposes.
Members of the public or businesses who encounter fake medical certificates or illegal Phor Thor 33 sales are urged to report them via the Traffy Fondue application or the hotline 02-257-7042, he said.
