Travelling with prescription medication — the paperwork, rules and packing guide

The basics that catch people out

Some default UK assumptions that don't always work abroad:

• 'Anything you can get over the counter in the UK is fine everywhere.' Not true — some OTC UK products (e.g. codeine-containing painkillers, some decongestants, some sleep aids) are restricted or illegal in specific countries.
• 'A prescription label on the bottle is all I need.' Mostly true — but controlled drugs, large quantities, injectables, and unusual-looking medications often benefit from a doctor's letter.
• 'I'll just buy more if I run out.' Often possible but not always reliable — destinations, brand availability, and local prescribing rules vary.
• 'I'll pack medication in my checked bag to save weight in hand luggage.' Don't — hold luggage is not temperature-controlled, can be delayed, and can be lost. All essential medication goes in hand luggage.

What to pack and how

The minimum for most travellers:

• All regular medication in hand luggage, in original packaging with the pharmacy label intact.
• Enough for the full trip plus at least a week's buffer. Delayed flights, extended stays, accidental damage all happen.
• A copy of your repeat prescription (paper or photo on your phone) — helps if anything needs replacing locally.
• A list of medications with generic names, doses, and what they're for. Brand names vary internationally; generic names are universal.
• A doctor's letter for: controlled drugs, injectables, large quantities, unusual medication, or any destination with strict drug-import rules.
• Insurance details including your insurer's emergency phone number.

Doctor's letters — what they should contain

A useful travel medication letter contains:

• Patient name and date of birth (matching passport).
• List of medications: generic name, dose, frequency, what condition it's for.
• Why each medication is necessary.
• Any specific dispensing or administration instructions (e.g. injectable, fridge storage).
• Dates of travel.
• Clinician name, GMC/GPhC registration number, signature, date.
• Practice/pharmacy letterhead and contact details.

We can produce travel medication letters as part of a consultation. NHS GPs can sometimes do this on request — a small charge may apply.

Controlled drugs — the strictest rules

Controlled drugs (CDs) include opioid painkillers (morphine, oxycodone, tramadol in some classifications), benzodiazepines (diazepam, lorazepam), ADHD stimulants (methylphenidate, lisdexamfetamine), some sleep aids, and others. The rules:

• UK rules. For travel out of the UK with more than 3 months' supply of CDs, you need a Home Office personal licence. Less than 3 months, you don't need the licence but should still carry a doctor's letter.
• Destination rules vary widely. Some countries have very strict CD rules; some require pre-arrival permits; some prohibit certain CDs entirely. Always check the destination's specific rules well before travel.
• Notable strict destinations. United Arab Emirates, Japan, Singapore, Saudi Arabia, Russia, China — these have stricter rules and sometimes restricted lists.
• What to bring. Original prescription packaging with intact pharmacy label, doctor's letter explaining medical need, copy of UK prescription, ideally a printout of destination rules confirming the medication is permitted.

Country-specific restrictions to watch for

A non-exhaustive list of medications that have caused traveller issues:

• Codeine and codeine-containing painkillers (Solpadeine, Nurofen Plus, etc.): restricted or illegal in UAE, Greece (with caveats), Japan, several others.
• Pseudoephedrine (some decongestants): restricted in Japan, Mexico, several others.
• ADHD stimulants: heavily restricted in Japan, UAE, several Asian countries.
• Benzodiazepines: restricted entry to several countries; permits often required.
• Some HRT and contraception: occasionally questioned at customs in some countries.
• CBD products: legality varies enormously; some countries (Singapore, UAE) treat CBD as a serious offence.
• Cannabis-derived medications (e.g. medical cannabis): vary by country; often illegal entirely.
• Tramadol: restricted in Egypt and several others.

Always check the destination embassy website and FCDO travel advice for medication-specific guidance.

Fridge medication and travel

Medications requiring refrigeration (most insulin, some biologics, some HIV antiretrovirals, some hormonal injections) need a temperature plan:

• Short journeys (up to a day). Insulated pen pouch or cool bag with a small cool pack works well. Don't put medication directly against a cool pack — it can freeze. Use a fabric layer between.
• Long-haul flights. Cabin temperature is fine for most fridge medication for a day. Refrigerate immediately on arrival.
• Multi-day journeys without refrigeration. Some medications tolerate room temperature for a defined number of days — check the patient information leaflet. Insulin pens typically tolerate up to 4 weeks at room temperature (below 25–30°C); insulin vials similar.
• Frozen medication. Discard — freezing destroys most biologics and insulin. Don't take a frozen pen 'just in case'.
• Hotel fridges. Mini-bars are sometimes too cold and can freeze medication. Test the temperature before storing critical meds.
• X-ray scanners. Standard airport security scanners don't damage medication.

Time zones and dosing

For most once-daily and twice-daily medication, gradual adjustment to local time over the first few days works well. For more time-sensitive medication, specific approaches:

• Insulin. Long-acting basal insulin: gradual adjustment over 2–3 days. Mealtime insulin: dose with meals as normal in local time. Diabetes specialist advice for complex regimens.
• Oral contraception. Time-zone shifts of less than 12 hours: take in usual UK time direction or local time, whichever you prefer. Larger shifts may need a 'shift dose' to bridge — ask a pharmacist before travel.
• Antiepileptics. Time-sensitive — specialist advice for your regimen and destination.
• Immunosuppressants (after transplant). Strict timing matters — specialist advice essential.
• Mental health medication. Most tolerate small time shifts. Specific scenarios (lithium, MAOIs, complex regimens) need specialist input.
• HRT. Generally flexible; oral HRT may be affected by gastric emptying changes during travel illness.

Set phone reminders in local time to avoid the 'is it UK time or here?' confusion.

What to do if medication is lost or damaged

If your medication is lost in transit or damaged abroad:

1. Don't panic. Most UK medications are available internationally, sometimes under different brand names.
2. Contact your travel insurer first — some policies cover emergency medication supply.
3. Visit a local pharmacy with your prescription or repeat slip (or phone photo). Many pharmacies abroad will dispense against a UK prescription for common medications, or at least help identify a local equivalent.
4. For a UK prescription, a local doctor or hospital can sometimes re-prescribe.
5. For controlled drugs, escalation is more complex — contact your insurer's medical assistance line.
6. The nearest UK consulate can advise on local medical access in extreme cases.
7. If you're returning to the UK soon, consider whether you can manage the gap with adjusted dosing or alternative care until home.

Vaccines and travel medication — different rules

This guide is about regular prescription medication. Travel-specific vaccines and prophylaxis (malaria tablets, stand-by antibiotics, ICVP) follow different rules — see our guides on malaria tablets, stand-by antibiotics for diarrhoea, and Yellow Fever certificates.

Specific scenarios

Diabetes and insulin. Adequate supply, insulated pen pouch, sharps disposal plan, sick-day rules. Travel insurance specifically covering diabetes.

Biologics for inflammatory conditions. Cool storage, syringe disposal, dose timing if missed. Some destinations have specific import rules for biologics.

Post-transplant. Strict adherence, time-zone planning, specialist input before travel. Avoid live vaccines.

HIV. Generally straightforward but adequate supply, discretion in destinations with HIV-related restrictions, awareness of medication interactions with malaria prophylaxis.

Cancer treatment. Specialist input; some treatments require specific timing around travel.

Insurance considerations

Travel insurance with adequate cover for pre-existing conditions is essential — see our travel insurance guide. Specifically check that your policy covers emergency medication replacement if lost.

The next step

If you have a complex prescription regimen and you're travelling internationally, a 30-minute travel consultation can sort the doctor's letter, the storage plan, the timing question, and any country-specific concerns. We can also prescribe a small additional supply for the trip if appropriate.