How to get a medical cannabis prescription in Thailand

To get a medical cannabis prescription in Thailand, you must first visit a licensed physical clinic, dispensary, or a hospital that employs registered medical professionals, such as doctors or traditional Thai medicine practitioners. During this in-person consultation, you will undergo a medical evaluation to discuss qualifying conditions like chronic pain, insomnia, or anxiety, and you must provide your passport or Thai ID for registration.

If approved, the practitioner will issue you a standardized PorThor 33 (PT33) form, which is the only document legally recognized by Thai authorities for the possession and purchase of cannabis flower. It is vital to understand that most "online weed cards" or digital-only certifications sold via messaging apps and websites are scams that hold no legal weight with the police; a legitimate prescription must be a physical document with a "wet ink" signature from a licensed professional.

Once you have this paper prescription, you can take it to a licensed dispensary to purchase a 30-day supply, but you must ensure the clinic or pharmacy is authorized by the Ministry of Public Health. These prescriptions typically expire after 30 days, meaning you must return to a physical clinic for a follow-up evaluation to renew your legal status. Always keep the original PT33 form and your official purchase receipt with you at all times when carrying cannabis to avoid heavy fines or potential imprisonment under current Thai law.