Doctor's letter for Thailand
The official sources recorded for Thailand ask for a medical certificate that states the diagnosis or condition, the generic (INN) name of each medicine, the strength of each medicine, the total quantity carried and the prescriber's licence or registration number.
ADHD medication rules last checked 6 Oct 2026
What does the medical certificate have to state?
For methylphenidate and lisdexamfetamine only.
The source asks it to state
- The diagnosis or condition
- The generic (INN) name of each medicine
- The strength of each medicine
- The total quantity carried
- The prescriber's licence or registration number
Signed by your treating doctor, and it must carry the doctor's licence number as well as your diagnosis, each medicine with its strength, the instructions and the total amount prescribed. Keep the original with you.
Main public source for Thailand
- Thai FDA Medicines Regulation Division FAQs: a traveller may bring medicine for personal use for up to 30 days, with its prescription and in its original container, Food and Drug Administration, Ministry of Public Health, Thailand
What else does the record list?
Besides the documents above, the record for Thailand lists: Import permit: Apply online in the FDA's permit system at least 15 days before travel; the permit issued is Form IC-2; Original packaging. The Thailand country page explains each of them and which medicines they apply to.
Related pages
- Travelling to Thailand with ADHD or controlled medication
- What a travel letter for controlled medication should contain
- For prescribers
- Check your whole itinerary
Reviewed 6 Oct 2026. Rules change: confirm with the Thailand authority or its embassy before you travel.
This page lists what official sources ask for. It is information only, not legal or medical advice, and it does not suggest what a doctor should write or certify: the prescriber decides that from their own assessment of the patient. The traveller and the prescriber should confirm current requirements with the authority concerned before travel. See also the disclaimer.