Traveling with Medication

Your suitcase is packed, the excitement of departure is here. But as you zip up your toiletry bag, doubt creeps in.
Will my syrup make it through airport security? How do I keep my insulin cool? And above all: could customs seize my medication?

Traveling with medication isn't something to improvise. Between air travel security rules and sometimes strict local laws, it's normal to have questions. A preparation mistake can quickly turn passing through customs into a source of stress, or even lead to the confiscation of essential products.
Rest assured: with a bit of forward planning, everything will go smoothly. This practical guide details the exact steps to legally bring your medication and avoid problems once there.

Bonus tip: Before worrying about transport, make sure you haven't forgotten anything essential by checking our article on the ideal travel medicine kit.

Before You Leave: Planning Ahead

To avoid any hold-up at customs, your medication shouldn't travel incognito. Clear paperwork is your best insurance against confiscation.

The Prescription and the Medical Certificate

For liquid medications over 100 ml, but also if you need to carry an asthma inhaler or insulin for diabetes treatment, never leave without your valid original prescription. It proves that the products you're carrying were indeed prescribed to you. If you don't have the original prescription, ask your doctor for a travel medical certificate.

A Belgian prescription alone isn't always enough. So ask your treating physician for a travel medical certificate. This document must include:

• The names of the medications in INN (International Nonproprietary Name). The brand name (e.g., Dafalgan) varies from country to country, but the active substance (Paracetamol) is universal.
• Any chronic conditions you have.
• The exact dosage.
• Wording in English (an international language) in addition to French.

The Right Quantity

Bring the amount needed for the exact length of your stay, plus a safety margin.

An airline strike, a quarantine, or a missed flight can extend your trip. Plan enough to last at least one extra week so you never run out of medication far from home.

Special Cases: Controlled Substances and the Schengen Area

Be careful if you take sleeping pills, strong anxiolytics, or ADHD medication (such as Ritalin). These are often classified as controlled substances or psychotropics.

• Travel within the Schengen Area: You must complete a specific declaration (standard certificate) signed by your doctor and validated by the AFMPS (Federal Agency for Medicines). Plan for this administrative step at least 3 to 4 weeks before departure.
• Travel outside Schengen: The rules are stricter. Contact the embassy of your destination country. Legalization of your medical certificate is often required.

For any information regarding the rules for controlled and psychotropic substances, see the following link: Information for travelers

Carrying Your Medication by Plane: Carry-On or Checked Baggage?

The answer is clear: for your essential medication, always choose carry-on luggage.

In the Cabin: The Liquids Rule vs. the Medical Exception

You know the strict 100 ml rule for liquids? Good news: it doesn't apply to prescription medications.

You're allowed to bring syrups, contact lens solutions, or sprays over 100 ml, under two conditions:

1. Being able to show the prescription or certificate to security staff.
2. Keeping the products in their original packaging (no transferring into unlabeled bottles).

The practical tip: Put all your liquid medications in a clear plastic bag, separate from your regular toiletry bag. Take it out on your own at the security check to save time.

For solid medications, such as capsules or tablets, it's simpler: as a general rule, they can be carried without any particular restriction in hand luggage or a cabin suitcase, regardless of the length of the trip. It's nonetheless advisable to keep them in a separate pouch to make the security check easier, and to keep the original packaging (with the leaflet).
However, be careful of the special rules for controlled substances, opioids, certain psychotropics, ADHD medications, etc. (see above).

Why Avoid Checked Baggage?

Putting your medication in your checked suitcase seems like a good idea, but isn't, for two major reasons:

• Temperature: It's very cold in the cargo hold (sometimes below zero). Freezing can affect the effectiveness of certain products, particularly insulin, which becomes ineffective if it freezes.
• Risk of loss: If your suitcase doesn't arrive at the same time as you, you risk being without your medication for 24 or 48 hours. An unacceptable risk for a chronic condition.

Specific Equipment (Diabetes, Oxygen)

Are you traveling with syringes, injector pens, or a pump?

• Needles and pens: They're allowed in the cabin upon presentation of the medical certificate. Point them out to staff before going through security.
• Oxygen: Rules vary greatly between airlines. You must contact them several weeks before the flight to arrange transport (approved cylinders or portable concentrators).

Once You're There: Managing Your Treatment Properly

Once you've arrived, don't let your guard down. Heat or a change in routine can compromise the effectiveness of your treatment.

Storage: Pitfalls to Avoid

Temperature fluctuations are enemy number one for your medicine kit.

• In the car: Never leave your medication in the glove compartment or on the rear shelf in direct sunlight. A simple cooler bag is often enough to protect them during the trip.
• At the hotel: Be wary of the minibar. It often automatically switches off when you remove your key card upon leaving the room. Always check that it stays cold at all times before storing insulin in it.

The Time Difference Puzzle

If you take medication at fixed times (e.g., birth control pill, insulin), jet lag can throw off your balance.

• Short stay (< 1 week): Keep taking your medication on Belgian time — it's often simpler.
• Longer stay: Gradually shift the time you take it (by 1 or 2 hours a day) once you're there. If you're diabetic, ask your doctor for advice before leaving to set up a precise schedule.

Urgent Medication Needs Abroad

Needing medication urgently can happen if a chronic condition flares up, following an accident, or if you fall ill, especially if you're traveling with young children. Finding it quickly can sometimes be difficult due to limited pharmacy opening hours, insufficient stock, or the requirement of a prescription.

• Be careful if you need medication abroad: the name of a medicine sold in Belgium may have a different brand name, or come under a different name or packaging abroad. To find the equivalent of your medication, it's best to know the international nonproprietary name of the active substance (molecule) in the medicine. You'll also find this name on the leaflet.
• Good travel assistance will help you obtain, abroad, the medications that are essential to you and prescribed by a doctor if you can't find an equivalent locally. The healthcare professionals at the assistance service can inform you about medications available locally (their names and alternatives). In an emergency, if an essential medication can't be found, they can arrange to have it shipped, while complying with local laws.

The Ultimate Checklist for Traveling with Medication

To make sure you don't forget anything in the last-minute rush, check off these 5 essential points before closing your suitcase:

• Paperwork: I have my original prescription and a medical certificate (in English and with INN names) for my chronic treatments.
• Quantity: I've packed enough medication for the entire stay plus a 1-week safety margin.
• Carry-on luggage: I'm keeping all my essential medications with me (not in checked baggage!).
• Packaging: My products are in their original boxes with the leaflet (no unlabeled pill organizer for customs).
• Liquids: My syrups and gels are grouped in a clear plastic bag, ready to be shown at the security check.

In Short: Travel with Peace of Mind

Traveling with medication takes a bit of organization, but it shouldn't spoil your enjoyment. By following these simple rules, you'll cross borders without a hitch. Planning ahead is the key to making sure your health is never a barrier to your getaway.

Don't Let the Unexpected Ruin Your Vacation

Even with the best preparation, a lost suitcase or a stolen backpack can happen. To travel with peace of mind, Redion travel insurance is your safety net. If your essential medication is lost or stolen, we arrange to locate it or ship a replacement to your vacation destination if no equivalent is available locally.

FAQ – Traveling with Medication

First published: 05/2015 - Updated: 07/2026