Travel and cancer
If you need to take prescribed medication with you, speak to your GP or specialist at least 6 weeks before you go.
Make sure you have enough medicine to last for the whole trip, plus a few extra days in case there are any delays.
You usually need a doctors letter for medication such as opiate painkillers. For regular medication such as blood pressure tablets, a copy of your NHS prescription should be enough.
It’s worth taking a doctor's letter with you. This can explain your condition and list any drugs you're taking with the amounts (dose). You can also take a copy of your prescription. This will help if customs officers question you about them. Also if you need any treatment when you are away or if you lose your medicines and need a new prescription.
Remember that some medicines you can buy over the counter in the UK might be controlled drugs in other countries. Controlled drugs have strict legal controls over how they are stored and prescribed.
Any special arrangements you need to make will depend on:
how long you're going away for
where you're going
the type of medicine you're taking
Doctors can only prescribe a limited amount of any drug in the NHS. So if you’re going away for more than 3 months, make sure you'll be able to get any medicines you need in the country you’re going to.
You need to be careful when buying medicines abroad. In some developing countries, there is a high risk of buying medicines that are poor quality or that don't contain the same ingredients.
Look for foreign embassies in the UK
For most medicines that get prescribed or you buy in a pharmacy, there are no restrictions on what you can take out of the UK. But some countries have restrictions on the type and amount of medicines you can take in. This usually applies to drugs that can cause addiction or other problems, such as:
opiate painkillers
mind altering drugs
anabolic steroids
Restrictions might also apply to medicines that need to be injected.
The restrictions vary a lot between countries. Some countries might include some drugs that you can buy in the UK, such as painkillers containing codeine.
The Home Office recommends that you check with the country’s embassy or High Commission. They can tell you about any restrictions they have.
Governments information on travelling with a controlled drug
The International Narcotics Board has information about medicines containing controlled drugs by country.
International Narcotics Control Board
Some drugs, including all controlled drugs, have limits on the amount you can take out and bring into the UK.
You might need to get an export licence if you need to take out or bring in more than the limit.
It’s best to check the countries information you are travelling to and from on controlled drugs. It can vary quite a lot. It may also depend on the drug you are taking and on the exact amount.
Controlled drugs are mostly painkillers but others include barbiturates and sedatives. Drugs that are controlled in the UK are generally controlled in other countries. But some countries have more restrictions so it's best to check. If you do need a licence, make sure you apply at least 10 days before your travel date.
Look at the most common controlled drugs
Information about a personal licence
Your GP or specialist doctor can write this. If you are getting it from your GP surgery there might be a charge for the letter.
Ask your doctor for the letter at least 3 weeks before you plan to go, so they have time to write it.
The letter should contain:
your name
your medicines - particularly any drugs that have an effect on the brain. Such as certain painkillers, or any medicines that you take as an injection
the amount you take and how often
your type of cancer
the treatment you’ve had
the country / countries you are going to and dates of travel
It can help to list the chemical (generic) name of the drug and not just the brand (trade) name. This is because the brand name might be different in the country you are visiting.
Carry the letter in your hand luggage so that you can show it to customs officers if you need to.
Carry all your medicines in the labelled containers that your pharmacist gave you. If you carry unnamed loose tablets, a regular customs officer won't know what they are. They could suspect you of drug smuggling.
Make sure you take any controlled medicines in your hand luggage, with your doctor’s letter. If you need to take any injections with you on the plane, you’ll need a doctor’s letter explaining that you need to carry them in your hand luggage.
Speak to your speclialist or pharmacist if you are crossing time zones. They can tell you when to take your medicine.
It might be a good idea to carry medicines that aren’t controlled drugs in both your hand luggage and suitcase, in case one bag goes missing.
Check whether very cold temperatures can damage the medication. This could affect where you need to pack them. Baggage holds in planes are very cold, although many planes have a heated area.
Solid medicines such as tablets or capsules are normally fine in cold temperatures but you need to take liquids in your hand luggage.
The usual limit of liquids through security is 100mls per container. Medicines can come in bottles larger than 100mls. It's best to call your airline and airport to check what documents you need. They can tell you whether you need more than a doctors letter and prescription.
Find out more about hand luggage restrictions on the UK government website
Ask your pharmacist about how to store medicines that need to be at a certain temperature. As some drugs might be fine at room temperature for a while. Or you might need to transport them using a cool bag, icepack or thermos flask.
Before you leave, check that where you’re staying has somewhere you can keep your medicines cool.
If you need oxygen, you can arrange to take this with you. But allow plenty of time to sort it out, because it can take a while.
Arranging oxygen for your trip
Some airlines provide oxygen for passengers, others allow you to bring your own and some won’t let you. Before you book it’s best to make sure what the airline’s policy on oxygen is. Some airlines might also ask for an extra payment if you need oxygen.
The European Lung Foundation have a database of airlines that list individual oxygen policies.
Last reviewed: 12 Jun 2025
Next review due: 12 Jun 2028
Travelling abroad when you have cancer might not affect where or how you travel. It's important to have travel insurance.
Most people who have cancer can travel without problems. In some circumstances you might need to wait before flying. Or make special arrangements with the airline.
Get information on coping with practical matters such as money and travel, as well as treatment for overseas visitors.
Search for the cancer type you want to find out about. Each section has detailed information about symptoms, diagnosis, treatment, research and coping with cancer.
Travelling when you have cancer or are having treatment might need some extra planning. Find out how cancer can affect travelling in the UK and abroad and get tips to make it easier.
Information on travelling with oxygen and taking oxygen on holiday.

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