Medication in Carry-On: TSA & Global Security Rules (2026)

Medications should always travel in your carry-on — not your checked bag. If your checked luggage is delayed, lost, or damaged, you need your medications with you. Security rules for medications are more flexible than many travelers realize, but they vary by country and medication type. This guide covers the full picture.

The Core Rule: Always Carry Your Medications

Regardless of destination or airline, the universal best practice is: all prescription medications and critical over-the-counter drugs go in your carry-on. This applies even when checked luggage would be easier. Reasons:

• Checked luggage can be delayed or lost
• Hold temperatures can reach extremes — dangerous for insulin and some biologics
• You may need medication during the flight itself
• Customs and security may need to inspect medications

US TSA Rules for Medications

Liquid Medications and the 3-1-1 Rule

The TSA's standard 3-1-1 rule (liquids in containers of 100 ml or less, in a single clear quart-sized bag) does not apply to medically necessary liquid medications. You can bring:

• Liquid medications in containers larger than 100 ml
• Liquid medications in multiple containers
• Liquid nutritional supplements if medically necessary
• Ice packs, freezer packs, and cooling gels for temperature-sensitive medications (even if partially frozen or liquid)
• Gel ice packs for insulin and biologics

What you must do: Declare liquid medications to the TSA officer at the checkpoint. Remove them from your bag and place them separately in a bin. This allows officers to inspect them without opening your 3-1-1 bag.

TSA recommends (but does not require) keeping medications in their original pharmacy packaging for easiest identification.

Prescription Medications (Pills, Tablets, Capsules)

Solid medications — pills, tablets, capsules — are not subject to the liquids rule at all. You can bring any quantity. TSA does not require original pharmacy bottles for solid medications, though it is recommended.

Syringes and Injectable Medications

Syringes are permitted in carry-on bags when accompanied by the medication they're used for. The medication must be clearly identified (original labeled vial, packaging, or prescription label). Syringes without medication — or syringes not accompanied by a clearly identified associated medication — may be confiscated.

For insulin users: Bring the insulin vials with original labels, your syringes or pen needles, a glucometer, and test strips. A letter from your endocrinologist is not legally required but is strongly recommended for international travel and makes security interactions faster.

EpiPens and Epinephrine Auto-Injectors

EpiPens are permitted in carry-on bags. Keep the original prescription label on the device. Carrying two (a standard practice for people with severe allergies) is permitted. Alert the TSA officer at the checkpoint.

Controlled Substances

Prescription controlled substances (opioids, benzodiazepines, Adderall, etc.) are permitted in carry-on baggage within the US when they are validly prescribed. International travel with controlled substances is more complex — see below.

Medical Devices

The following medical devices are permitted in carry-on baggage:

• CPAP and BiPAP machines — always permitted; are not counted as your carry-on allowance by most airlines. Carry a letter from your doctor if the device requires explanation. TSA may need to test the machine.
• Nebulizers — permitted in carry-on
• Insulin pumps — can remain on body through security; pumps cannot safely go through backscatter X-ray machines. Request a pat-down if needed.
• Implanted medical devices — pacemakers, cochlear implants, and insulin pumps may alarm metal detectors. Carry a device identification card.

EU Security Rules for Medications

Liquid Medications in the EU

EU security rules restrict liquids over 100 ml in airport security — but provide an explicit exemption for medically necessary liquid medications when accompanied by supporting documentation.

To bring liquid medications over 100 ml through EU security, you need:

• A medical certificate or prescription from a licensed physician, in English or the local language, confirming the medication is necessary
• Alternatively, a pharmacist's certificate or dispensed prescription label with the medication name, dosage, and patient details

The documentation should be carried with the medication, not packed away.

Practice varies by airport and officer. At major hub airports (Heathrow, Amsterdam Schiphol, Frankfurt), officers are familiar with medical exemptions. At smaller or regional airports, requests to see documentation are more common and the exemption may be applied inconsistently.

Prescribed Medications (Solid) in the EU

Solid medications have no quantity limits at EU security. Original packaging with your name and the prescribing doctor's details provides the smoothest experience.

Controlled Substances in the EU (Schengen Area)

For prescription controlled substances within the Schengen Area, you need a Schengen medical certificate for quantities above 30 days' supply. This certificate is issued by your doctor and must be countersigned by a national health authority in many EU countries. Requirements vary by country — check with your prescribing doctor and the embassy of each country you'll visit.

International Travel With Medications

Traveling to Australia

Australia has strict biosecurity laws and detailed controls on prescription medications:

• Up to 3 months' supply of most prescription medicines can be brought in without a permit
• Some controlled substances (high-dose codeine, certain stimulants) require a permit from the Australian Border Force
• Declare all medications on your arrival card

Traveling to Japan

Japan restricts some medications that are common elsewhere. Notably:

• Pseudoephedrine (common in cold medications like Sudafed) is controlled and may be prohibited above certain quantities
• Adderall and amphetamines are illegal to bring into Japan, even with a valid prescription
• Narcotics require a yakkan shoumei import certificate obtained from a Japanese consulate before travel
• Check every medication against Japan's controlled substance list before traveling

Traveling to the UAE and Gulf States

Some medications containing controlled substances are illegal in UAE, Saudi Arabia, Qatar, and other Gulf states even with a prescription. Requirements vary but typically include:

• Quantities limited to 1 month's supply
• Original prescription from your doctor
• Some medications require advance approval from the health authority of the destination country

Traveling to Southeast Asia

Singapore, Thailand, Malaysia, and Indonesia have varying restrictions on controlled substances. Singapore in particular has strict drug laws — even small quantities of some controlled substances without proper documentation can create serious problems. Research specific medication restrictions for every country on your itinerary.

How to Pack Medications for Smooth Security

Keep medications in original pharmacy packaging. The label connecting your name, the drug name, dosage, and prescribing doctor is the most useful documentation at security.

Carry a medication list. A simple printed or digital list of all your medications (generic names, doses, and what they treat) helps at foreign pharmacies, hospitals, and security checkpoints.

Pack medications at the top of your bag. Easy access for security inspection avoids repacking your entire bag.

Prepare documentation in advance for injectable medications. A letter on your doctor's letterhead listing your condition, medications, and why needles are necessary takes a few minutes to request and can save significant delay at security.

Bring enough plus extra. Pack enough medication for your entire trip plus 3–5 extra days in case of delays. Consider whether your medication is available at your destination if you need an emergency resupply.

Temperature-sensitive medications: Insulin and biologics should travel in an insulin travel case or cooler pouch with gel packs. Don't pack these in checked luggage — hold temperatures can freeze or overheat medications. Keep them in your carry-on.

CPAP Machines at Security

CPAP and BiPAP machines require removal from your bag at US security (TSA), similar to a laptop. Place the machine in a separate bin. Do not put it through the X-ray in your bag.

Carry:

• Your prescription or a letter from your sleep specialist
• All necessary power adaptors (CPAP machines vary in international voltage compatibility)
• Distilled water if your machine uses a humidifier (note: water is subject to the 3-1-1 rule)

Most airlines do not count a CPAP machine as your carry-on bag — it travels as a medical device in addition to your standard allowance. Confirm this with your airline before travel.

The Bottom Line

All medications belong in your carry-on. TSA exempts liquid medications from the 3-1-1 rule with declaration at the checkpoint. EU security requires documentation for liquid medications over 100 ml. Injectable medications (insulin, EpiPens, biologics) are permitted with original labeled packaging. For international travel, especially to Japan, the UAE, and Australia, research your specific medications against the destination country's controlled substance laws before departure.