Importing Medicines into Thailand: FDA Personal-Use Rules

TL;DR

Personal-use medication import is permitted up to a 30-day supply per traveller with the original prescription under Drug Act B.E. 2510 (1967) and FDA-Thai Notifications. Larger quantities require an FDA-Thai import permit. Controlled substances (narcotics, psychotropics) face strict rules under the Narcotics Code B.E. 2564 (2021) and Psychotropic Substance Act — prior FDA permission and import-quota system apply.

Categories

Documentation to Carry

• Original prescription with doctor's name + licence.
• Letter from prescribing doctor explaining medical condition (English + ideally Thai translation).
• Original packaging.
• Pre-approval letter from FDA-Thai for controlled substances.

FDA Pre-Approval Process

1. Apply via FDA-Thai online or in person.
2. Submit doctor's letter + product specification.
3. FDA review (1-4 weeks).
4. Permit letter issued; carry with traveller.

Common Mistakes

• Bringing more than 30-day supply without permit.
• Carrying controlled substances (e.g., ADHD medications) without pre-approval.
• Generic medications without prescription — customs may seize.
• Buying controlled substances in Thailand without Thai prescription.

FAQs

1. Can I mail medications?

Mail-order import is more restricted than personal carriage; FDA-Thai permit commonly required.

2. Cannabis products?

Cannabis-policy is fluid in Thailand; current rules under the Narcotics Code Notifications must be checked before travel.

The Personal-Use Rule in Practice

Thailand lets travellers bring in a reasonable personal supply of their own prescription medicine — commonly treated as up to around a 30-day supply — provided it is genuinely for personal use and backed by evidence that it was prescribed to you. Carrying the medicine in its original labelled packaging together with the prescription and ideally a doctor's letter explaining the condition and dosage is what keeps a customs check straightforward. Ordinary over-the-counter medicines for personal use rarely cause difficulty; the risk rises sharply with quantity and with the class of drug, not with the fact of carrying medicine as such.

Controlled Substances Need Special Care

The real exposure is controlled substances — narcotic and psychotropic medicines regulated under the Narcotics Code and the Psychotropic Substance Act. Drugs that are routine prescriptions elsewhere (for example some strong painkillers, ADHD stimulants, and certain sedatives) can be controlled in Thailand, and bringing them without the right paperwork — or beyond permitted limits — can be treated as a serious offence rather than a customs formality. For these, travellers should obtain advance permission from the Thai FDA, keep the prescribing doctor's documentation, and check the current classification before flying, because the lists and the cannabis position in particular have shifted in recent years.

Related Reading

• Customs Cash Limits
• Criminal Law Hub