Travelling abroad with controlled drugs: rules and letters
- Last reviewed
- 6 min read
- For schools, universities, sports teams, production crews, event organisers, corporate groups
The short answer
GOV.UK says anyone taking medicine that contains a controlled drug out of the UK should carry it in hand luggage with proof it is theirs, such as a prescription or a letter from their doctor, and should check the destination's rules with its embassy first. The rules of the destination, not the UK, decide whether the medicine can be carried in, and breaking them can lead to a fine or prison. Group leaders should identify affected travellers early and avoid giving medical or legal advice.
Key takeaways
- Ask a doctor or pharmacist whether a medicine contains a controlled drug. The controlled drugs list is by drug name, not by medicine brand.
- Carry controlled-drug medicine in hand luggage, with a prescription or a letter from the prescriber proving it is yours.
- GOV.UK says the letter should give your name, travel dates, each medicine with amount, dose and strength, and the prescriber's signature.
- The destination sets its own rules. GOV.UK says carrying medicine that is illegal there can lead to a fine or prison, so check with the embassy before travel.
- Some countries need approval in advance. For the UAE, GOV.UK says you must apply to the UAE Ministry of Health, and the authorities advise applications are processed within 5 working days.
What counts as a controlled drug medicine?
Some prescription medicines contain drugs that are controlled under UK law. They are classed by schedules, and GOV.UK says to ask your doctor or pharmacist whether your medicine contains a controlled drug, then check the drugs on the packaging against the controlled drugs list. The list names drugs, not medicine brands, so a pharmacist is the right person to ask. Medicines in this group can include some strong painkillers and some medicines for attention, sleep or anxiety conditions.
Over-the-counter medicines can also cause problems abroad. GOV.UK's guidance for the United Arab Emirates, for example, says some UK prescribed and over-the-counter medicines are considered controlled substances there. Do not assume that a medicine that is easy to buy at home is accepted everywhere.
What do the UK rules say about taking medicine out?
GOV.UK's guidance on taking medicine in or out of the UK is mainly written for people bringing medicine into the UK, but it gives these points for leaving the UK:
- Carry medicine containing a controlled drug in your hand luggage.
- It may be taken at the border if you cannot prove it was prescribed for you.
- Carry a prescription or a letter from your doctor as proof that the medicine is yours.
- Check the destination country's rules with its embassy before you travel.
The same guidance sets out the UK's own limits for arrivals: you can bring up to 3 months' supply of your medicine into the UK, and larger amounts or medicine posted to you will be taken away. A licence is only considered in exceptional circumstances, and applications go to the Home Office Drugs and Firearms Licensing Unit about a month before travel.
What should the prescriber letter say?
GOV.UK says a letter proving the medicine is yours should include:
| Detail | What to include |
|---|---|
| Your name | As on the passport |
| Travel dates | Dates to and from the UK, or the countries and dates of the trip |
| Medicines | Each medicine with the amount you carry, the doses and the strength |
| Signature | The prescriber's signature. Include their professional registration details where possible |
For travel abroad, keep the letter with the medicine in hand luggage and a copy with the trip leader. Keeping medicine in its original pharmacy packaging is sensible practice, because the label shows the name and dose. Ask the prescriber early, as surgeries can take time to produce letters.
What do other countries require?
Rules differ by country, and the destination's law applies on arrival. GOV.UK warns that carrying medicine that is illegal in another country can lead to a fine or prison.
| Destination | What GOV.UK's travel advice says | Action |
|---|---|---|
| United Arab Emirates | Some UK prescribed and over-the-counter medicines are controlled substances. You must apply in advance to the UAE Ministry of Health using its online form. The UAE authorities advise that applications are processed within 5 working days. | Apply well before travel, and for each traveller who needs it. |
| Japan | GOV.UK's Japan page does not cover medication and points to the Japanese Embassy in the UK and TravelHealthPro. | Contact the embassy and read TravelHealthPro before travel. |
| Any other destination | Check that country's embassy, plus the health and entry sections of GOV.UK travel advice. | Allow weeks, not days. |
The sensible rule for groups is to start with the destination list, then ask who in the group takes regulated medicine. Do not wait until the week before departure, because approvals and prescriber letters take time. Our guide to how to use FCDO travel advice explains where entry and health sections sit.
How should a group manage this in practice?
- Ask early and privately. Include a medication question on the medical form, and explain that the answers are used to check destination rules and to care for the person. See handling traveller data under UK GDPR.
- Identify controlled-drug medicines with the traveller or parent and their prescriber, before you tell anyone else.
- Check the destination's rules for each medicine, using the embassy and the GOV.UK travel advice.
- Collect the letters. Each traveller carries their own letter, and the leader holds a scanned copy.
- Agree who carries and administers medicine. On school trips, the school's medicines policy decides whether a staff member holds it.
- Plan for the airport. Carry the medicine in hand luggage and allow time at security.
- Add the scenario to the emergency plan, including how to get a replacement if supplies are lost. See the group travel emergency plan.
Sports organisations have an extra layer: anti-doping rules. Our guide for athletes travelling with medication covers that side.
How Roamly can help
Roamly Travel builds destination entry checks, including medication rules, into the early planning of group trips and flags deadlines for approvals. Use our free travel document checklist and travel risk assessment tool, talk to our consulting service about risk assessment support, or contact us.
Sources
- GOV.UK: take medicine in or out of the UK
- GOV.UK: bringing medicine containing a controlled drug into the UK
- GOV.UK: travelling with medicine containing controlled drugs
- GOV.UK: United Arab Emirates health and entry advice
- GOV.UK: Japan entry requirements
General guidance only, checked against the sources above on 30 October 2026. Entry rules, airline policies and official advice change, so confirm the current position with the linked source before you travel.