Medical Cannabis: Evidence, Dosing, Routes and the Thai Rules

Cannabis as medicine, read at the level of published evidence: what cannabinoids do in the body, how route and dose change the outcome, and where the claims run ahead of the trials. For patients, carers and clinicians.

Sub-boards cover the conditions with the most literature behind them, cancer, epilepsy and topical use, alongside Science & Research, Novel Cannabinoids, Edibles & Recipes, CBD & Cannabinoid Wellness, Medical Tourism in Thailand and the certification and export board.

Three things to be clear about before reading. Nothing posted here is a prescription, a diagnosis or a treatment plan; it is background reading for a conversation with a practitioner. In Thailand the flower is a controlled herb under the Notification of the Ministry of Public Health Re: Controlled Herbs (Cannabis), B.E. 2568, published in the Royal Gazette on 25 June 2025 and in force from 26 June 2025, and supply for medical use runs through a practitioner’s order on form Phor Thor 33 for a maximum of thirty days. Extracts are a separate regime under the Ministerial Regulation on Cannabis or Hemp Extracts B.E. 2569, in force from 26 April 2026.

Where to start