Flying With Prescription Medication: Security vs Customs Rules

Security lets you fly with almost any prescription pills. Customs is stricter: Japan allows 1 month without a permit, Vietnam 7 days of opioids.

Can you fly with prescription medication?

Yes, you can take prescription medication on a plane, and in the US pills are allowed in unlimited amounts once screened^[1]. The real risk sits on the other side of the flight, at destination customs. Japan caps ordinary prescriptions at one month without a permit, and Vietnam allows only seven days of opioids without one.

This guide is general information, not medical advice. Rules change; check with the destination's embassy or health ministry and your prescriber before you travel.

Two checks, two sets of rules

Every international trip with medication passes two separate checks. Airport security asks whether an item is safe to carry on board. Customs at the destination asks whether you may bring that medicine into the country at all.

Security rules are broadly similar from London to Sydney. Customs rules are national laws, and a 2023 review of official sources^[55] found that import restrictions on narcotic and psychotropic drugs vary widely between countries. Some countries do not follow the international recommendations.

Most travellers prepare for security and get caught at customs. The rest of this guide takes each check in turn, then covers paperwork, packing and what to do when things go wrong.

Even the US splits the two checks. TSA does not require medicine to be in prescription bottles^[1]. US customs (CBP) says medication should be in its original container^[9] with the doctor's instructions on the label: one country, two answers.

Airport security: what you can carry through the scanner

Solid pills, tablets and capsules face no quantity limit at the main security authorities. Liquid medicines are exempt from the 100 ml rule almost everywhere, provided you declare them. The details differ by region.

Region	Pills and tablets	Liquids over 100 ml	Documents at security
United States (TSA)	Unlimited once screened, carry-on or checked	Allowed in reasonable quantities; declare at the start	Not required; state labelling laws may apply
United Kingdom	No limit; no proof needed for tablets	Allowed; containers up to 2 litres at all UK airports	Letter or prescription for liquids over 100 ml
European Union	No limit	Allowed only for use during the trip	May be asked to prove authenticity
Canada (CATSA)	No volume limit; pill organisers fine	Allowed; declare; no 1 L bag needed	Not required
Australia (international)	Reasonable amount for the flight	Exempt; present with proof	Doctor's letter may be requested; label name must match boarding pass

United States

TSA allows medication in pill or solid form in both carry-on and checked baggage^[1] and strongly recommends carry-on. It does not require prescription bottles^[1], but certain state laws on prescription labelling still apply.

Liquid medication over 3.4 ounces (100 ml) is allowed in reasonable quantities for your trip^[3], outside the zip-top bag. You must tell the officer at the start of screening. For a deeper guide to syrups, drops and injectables, see our pillar on liquid medication on a plane.

United Kingdom

You can carry essential medicines of more than 100ml^[4] in hand luggage, including inhalers. Proof is needed only for liquids in containers over 100 ml, such as a doctor's letter or a copy of the prescription. Tablets need no proof.

Medical liquids up to 2 litres per container^[4] are allowed through security at all UK airports, though staff may open them. Controlled drugs follow separate rules^[17], covered in the customs section below.

European Union

The European Commission says essential medicines are permitted in quantities larger than 100 ml, but only for use during the trip^[5]. You may also be asked to prove they are genuine. That wording is narrower than the UK or US version, so pack bulk liquid supplies in checked baggage where you can.

Canada

CATSA allows prescription liquid medications in quantities larger than 100 ml^[6], outside the 1 litre bag, if you declare them. It states plainly that a day-by-day pill separator is not an issue for security^[6], and no medical documents are required.

Australia

Australian screening allows a reasonable amount of prescription and non-prescription medicines^[7] needed during the flight. Officers may ask for proof such as a doctor's letter, and the name on the prescription label must match your boarding pass.

Australia also recommends carrying only the flight's needs in the cabin and checking the rest. That conflicts with TSA and CATSA, who favour carry-on for everything. Our packing advice below explains why splitting your supply is the safer middle path.

Pill organisers: fine at security, risky at customs

A weekly pill organiser will not trouble security in the US or Canada. TSA's own answer to whether you can pack meds in a pill case is yes, with some qualifiers^[2]. The qualifiers arrive at customs.

The CDC advises that pill organisers should be avoided^[8] for international travel because loose tablets cannot be identified. It also says to avoid decanting medicine until after arrival^[8]. Carry the original pharmacy boxes and fill an organiser at your hotel.

Destination customs: the check that catches people

Customs officers apply national drug laws, and a valid prescription from home does not override them. The CDC notes that travellers risk arrest in Japan for bringing in banned substances^[8], even with a US prescription.

Three patterns repeat. Most countries cap ordinary prescriptions at one to three months. Controlled medicines (opioids, sedatives, stimulants) face tighter caps or an advance permit, and a few ingredients are banned outright.

Check every country you pass through, not just the last one. The CDC warns that regulations in transit countries^[8] can matter during a layover.

Country table: how much you can bring and what extra paperwork you need

The table summarises official rules for 26 popular countries plus the Schengen area. Ordinary prescription means non-controlled medicines; controlled means narcotic or psychotropic medicines as each country defines them.

Country	Ordinary prescription medicine	Controlled medicines	Key gotcha
Japan	Up to 1 month without an import certificate	Narcotics (incl. codeine) and Vyvanse need permission 14+ days ahead	Amphetamine (Adderall) banned even with a prescription
South Korea	Up to 6 bottles or 3 months	MFDS permit for any narcotic or psychotropic	Some cold medicines count as psychotropics
China	Reasonable quantity for personal use	Up to one prescription's maximum, with a diagnosis certificate	Ritalin and Concerta are Category I: a few days' supply
Hong Kong	Reasonable quantity for personal use	Prescription required for dangerous drugs	Antibiotics are controlled too
Singapore	Up to 3 months; never more	HSA approval 2+ weeks before arrival	Cannabis-derived medicines banned outright
Thailand	Up to 30 days with a prescription	Psychotropics over 30 days and all narcotics need a Thai FDA permit	Amphetamine prohibited
Indonesia	Up to 90 days with a prescription	Conflicting official guidance; confirm with BPOM	Narcotics may be refused entirely
Philippines	As prescribed, for the length of the visit	Max 30 days, doctor's letter and prescription	Rule names a locally licensed prescriber
Vietnam	30 days, or USD 200 value	Narcotics 7 days, psychotropics 10 days, declare	Longer supplies need an import permit
Malaysia	1 month	Declare; English prescription or letter	The 1-month cap includes vitamins
UAE	No prior submission for non-controlled	Stay length or 3 months, whichever is less; Rx under 3 months old	Pregabalin and tramadol are controlled
Saudi Arabia	No general figure published	SFDA online traveller permit	Hajj pilgrims: 30 days or stay
Qatar	No general figure published	MOPH e-permit or declare; narcotics 10 days	Psychotropics up to 60 days
Turkey	Reasonable amount for the stay	Doctor's report or prescription with doses	No fixed day limit
United Kingdom	Up to 3 months	3 months under exemption; licence only beyond	Letter for visitors must list doses
Schengen area	National rules apply	Article 75 certificate, max 30 days	Only residents of a Schengen state can get one
Germany	Usually up to 3 months	Amounts suited to trip length, with prescription	Schengen certificate if arriving from Schengen
France	Length of treatment on prescription	Prescription compulsory from outside Schengen	Without Rx: 1 month for controlled
Spain	Up to 3 months	AEMPS permit above set thresholds	Medical cannabis capped at 15 days
United States	90-day supply as a rule of thumb	Declare; original dispensed container	Residents: 50 units of controlled drugs bought abroad
Canada	90 days or one course, whichever is less	Up to 90 days; declare; labelled container	Changed from 30 days on 1 Oct 2026
Australia	Up to 3 months	Covered by traveller exemption; declare	Some medicines prohibited even with Rx
New Zealand	Up to 3 months	1 month; declare on arrival	Pseudoephedrine counts as controlled
Brazil	Compatible with the trip	Copy of prescription required	THC products on banned List F
Colombia	No published traveller figure	Max 30 days with prescription copy	Stays over a month need a local doctor
Costa Rica	Only the necessary quantity	1 month; documents in Spanish	Medical summary must be under 3 months old
South Africa	Up to 6 months (Schedules 3 to 5)	30 days for Schedule 6	Some official pages still say 1 month

Asia: what the official sources say

Japan: you can bring up to 1 month supply^[24] of prescription medicine without an import confirmation. Narcotics, which include codeine, need permission at least 14 days prior^[25] to travel, and Adderall's active ingredient cannot be imported into Japan, even for treatment^[25]. Read our full guide to Japan's banned medicines list.
South Korea: non-narcotic medicines are allowed up to a maximum of 6 bottles or three months^[26]. Anyone carrying a controlled substance should get a permit from the Ministry^[27] (MFDS), and Korea treats dextromethorphan as a psychotropic^[28].
China: personal medicines without narcotic or psychotropic content may be carried in reasonable quantities for personal use^[29]. Narcotics and Category I psychotropics are limited to the maximum quantity permitted under a single prescription^[29], which is short.
Hong Kong: a reasonable quantity for personal use^[30] is exempt from licensing. Dangerous drugs, antibiotics and Part 1 poisons still require a doctor's prescription.
Singapore: up to three months is allowed without approval, and quantities exceeding 3 months' supply are not allowed^[31] at all. Controlled substances need HSA approval at least two weeks before arrival.
Thailand: psychotropics up to 30 days need only a prescription. Longer supplies, and any narcotic, need a Thai FDA permit at least 15 days before traveling^[32]. A 2020 Thai FDA document lists amphetamine prohibited^[33]. See our ADHD in Thailand guide for specific regulatory context on amphetamine-based stimulants.
Indonesia: Japan's embassy-checked country sheet records narcotics and psychotropics allowed with documents, up to 2 months^[34], but other BPOM statements say narcotics are not permitted. Treat opioids as high risk and confirm with BPOM first.
Philippines: the Dangerous Drugs Board caps controlled medicines at a thirty day supply^[35], with a doctor's letter and the original labelled containers.
Vietnam: no permit is needed for up to 7 days of narcotics or 10 days of psychotropics^[36], which must be declared to customs.
Malaysia: medicines, vitamins included, are limited to one month's use^[37]. Stays longer than a month mean seeing a Malaysian doctor.
India: travellers needing narcotic or psychotropic medicines should seek permission of the Narcotics Commissioner^[38] well before departure. We left India out of the table because no official figure exists for ordinary medicines.

Country guides: Japan, South Korea, China, Hong Kong, Singapore, Thailand, Indonesia, the Philippines, Vietnam, Malaysia and India.

Middle East and Türkiye

UAE: the import permit moved to the Emirates Drug Establishment. Its e-permit is optional for travelers visiting the country^[39], and controlled medicines are capped at three months' need. The official list adds that the cap is the period of stay or a maximum three months^[40], whichever is less. See our guide to Gulf medication import rules.
Saudi Arabia: travellers declare controlled medicines in advance through the SFDA's Traveler's Permit for Controlled Drugs^[41] service, giving type, quantity and length of stay.
Qatar: the health ministry runs an electronic system for controlled medicines^[42]. Press reports of its guidance give narcotics 10 days and psychotropics 60 days^[43], far tighter than the UAE. Do not treat the Gulf as one rulebook.
Türkiye: foreigners may bring an amenable amount of medication^[44] for the stay, with a doctor's report stating the dose. There is no fixed day limit.

Country guides: UAE, Saudi Arabia, Qatar and Türkiye.

UK and Europe

UK: you can bring up to 3 months supply^[17]. A personal licence is only for longer supplies and is granted in exceptional circumstances^[18], so most trips do not need one.
Schengen: residents travelling within the area carry an Article 75 certificate, with max. 30 days^[19] of validity and one form per substance. Visitors from outside Schengen cannot get one; they rely on the destination's own rules. Our guide to ADHD medication in Europe walks through the certificate.
Germany: the health ministry allows as a rule, at most three months' need^[20]. Narcotics are allowed in amounts suited to the trip, with a prescription showing single and daily doses.
France: the quantity must match the treatment length on the prescription^[21]. From outside Schengen, a prescription is compulsory for narcotic and psychotropic medicines.
Spain: ordinary medicines are capped at three months of treatment^[22]. Narcotic and psychotropic medicines like ADHD medications above set thresholds need an AEMPS permit, applied for at least 10 days ahead.
Italy: controlled medicines need a certificate valid max 30 days^[23], unless you carry a single pack with a valid prescription.

Country guides: United Kingdom, Germany, France, Spain, Italy and Greece.

Americas, Oceania and Africa

United States: CBP's rule of thumb is to bring no more than a 90-day supply^[9], with a prescription or doctor's note in English. Controlled medicines must be declared and kept in the original container^[10]. US residents may bring back no more than 50 dosage units^[10] of controlled drugs obtained abroad. The FDA will allow foreign nationals^[11] a 90-day supply.
Canada: visitors may bring no more than a 90-day supply or a single course of treatment^[13], whichever is less. For controlled substances, the allowance is now up to a 90-day supply^[12], declared on arrival. Much online advice still says 30 days.
Australia: do not bring in more than a 3-month supply^[14]. The ODC lists morphine, methylphenidate, Adderall and benzodiazepines as covered by the traveller exemption^[15], but some products, such as mifepristone and metamizole, are prohibited.
New Zealand: prescription medicines are limited to three months' supply^[16], and controlled drugs to one month. Pseudoephedrine cold remedies count as controlled.
Brazil: medicines under special control need a copy of the prescription, and THC products sit on the banned list, per the ANVISA traveller leaflet^[46].
Colombia: controlled medicines are capped at a standard 30-day treatment^[47], with a copy of the prescription.
Costa Rica: controlled medicines are accepted for one month of treatment^[48], with documents translated into Spanish.
South Africa: the 2017 regulations allow six months^[45] of Schedule 3 to 5 medicines and 30 days of Schedule 6.
Mexico: amphetamine sits in Group II of Mexico's General Health Law^[49], its most restricted medical group. We could not verify a traveller quantity rule, so Mexico is not in the table; check with a Mexican consulate. Our ADHD in Mexico guide also explains specific rules for amphetamine-based stimulants like Adderall.

Country guides: United States, Canada, Mexico, Australia, New Zealand, Brazil, Colombia, Costa Rica and South Africa.

Medicines that are legal at home but restricted abroad

A handful of drug groups cause most border problems. The CDC names stimulants, opioids such as codeine and tramadol, zolpidem and pseudoephedrine as medicines that are illegal at some destinations^[8]. The split below shows how far apart countries sit.

Medicine group	Banned or tightest	Permit or extra papers	Routine with a prescription
Amphetamine stimulants (Adderall, Dexedrine)	Banned in Japan and Thailand	South Korea: MFDS permit; UAE: prescription and report	US (Schedule II); Australia
Lisdexamfetamine (Vyvanse, Elvanse)	Japan: advance permission only	Thailand: permit (Form IC-2); UAE: up to 3 months with prescription and report	US (Schedule II)
Methylphenidate (Ritalin, Concerta)	China: one prescription's maximum	UAE: listed psychotropic	Australia; UK (Class B)
Benzodiazepines (diazepam, alprazolam)	Vietnam: 10 days without permit	Thailand: permit over 30 days; Qatar: 60 days	UK (Schedule 4); US (Schedule IV)
Opioids incl. codeine	Vietnam 7 days; Qatar 10 days	Japan: codeine is a narcotic, permit needed	Australia, with prescription or letter
Tramadol	UAE: controlled list	Qatar: narcotic limits may apply	UK (Schedule 3); US (Schedule IV)
Pregabalin, gabapentin	UAE: controlled list	Carry prescription and report	UK (Schedule 3); US pregabalin (Schedule V)
Pseudoephedrine cold remedies	Japan: over 10% banned	New Zealand: controlled, 1 month, declare	Pharmacy sale in UK and US
Modafinil	Rarely banned	US: Schedule IV, declare	UK: prescription-only, not controlled
Antidepressants (SSRIs, SNRIs)	Rarely controlled	UAE: common ones not on the official list	Prescription-only almost everywhere
Cannabis medicines and CBD	Singapore, Thailand, Japan (THC)	Spain: 15 days; Brazil: THC banned	Varies widely
Zolpidem	UAE: controlled list	Required permission in some countries	UK (Schedule 4); US (Schedule IV)

The US schedules above come from the DEA controlled substances list^[50], and the UK classes from the Home Office controlled drugs list^[51]. The UAE entries come from the Emirates Drug Establishment list^[40], which names codeine, tramadol, pregabalin, gabapentin, zolpidem and methylphenidate.

The UAE list (dated September 2022 and still the current file) contradicts common advice twice: it includes amfetamine with the three-month allowance rather than as prohibited, and omits sertraline, venlafaxine, mirtazapine and amitriptyline. Yet non-inclusion of any similar material doesn't mean that it is not covered^[40], so apply for the free e-permit if in doubt.

Drug-by-drug guides with the full country split:

The paperwork that gets you through

Three documents cover most borders: the original pharmacy packaging, a copy of the prescription and a doctor's letter. TravelHealthPro advises keeping medicines in original pharmacy packaging^[52] and asking the prescriber for a letter listing them.

What a doctor's letter should include

The UK asks visitors for a signed letter with your name, travel dates, and a list of your medicine^[17], including quantity, doses and strength. The CDC adds the generic name, dosing specifics, and indication^[8]. A strong letter covers all of these:

·
Your full name exactly as it appears in your passport, and your date of birth.
·
Each medicine's generic name (INN), brand name, strength, form and daily dose.
·
The total quantity you are carrying and the dates of your trip.
·
The condition being treated, phrased as plainly as your privacy allows.
·
The prescriber's name, registration number, address, phone, signature and practice stamp.
·
A line confirming the medicines are for your personal use only.

Date the letter close to departure. Costa Rica requires medical documents no more than three months old^[48], and the UAE wants prescriptions issued within the last three months^[39].

Use generic names, not brand names

Brand names change at the border. Adderall, Elvanse and Concerta mean nothing on some customs lists, while the international nonproprietary name is recognised everywhere. Our tables of ADHD medication brand names by country and SSRI brand names by country help you match yours.

Translations

English is enough for many destinations, and US customs asks for a valid prescription or doctor's note written in English^[9]. Costa Rica requires documents translated into Spanish^[48], and Malaysia requires English. For other countries, a certified translation into the local language is cheap insurance.

Keep a digital copy of every document, plus your diagnosis and allergies. Our health records checklist for international travel lists what to carry. If your condition also affects whether you can fly, read our guide to fit-to-fly certificates.

Packing strategy: carry-on, checked bag and a split supply

Put your medication in hand luggage. TravelHealthPro advises carrying medicines in hand luggage and packing some extra medication in the hold^[52] in case hand luggage is lost or stolen.

A practical split looks like this:

Carry-on: everything you need for the journey plus at least a week, in original packaging, with the letter and prescription on top.
Checked bag: a second labelled supply as backup, unless the medicine is controlled, fragile or refrigerated.
Family member travelling with you: a small backup supply with a copy of your letter, if your destination allows it.
Controlled medicines: keep every dose with you in hand luggage, which the UK asks for explicitly.

Never carry medicine for someone outside your travelling family. The CDC flags transporting medication for persons other than accompanying family members^[8] as a problem, and several countries limit the allowance to the patient. Refrigerated pens and biologics need their own plan for cold chain management, covered in how to travel with insulin, biologics and refrigerated medication.

Time zones and dosing schedules

Crossing several time zones can shift your dosing interval. Before you leave, ask your prescriber whether to stay on home time or move doses gradually to local time. This matters most for the contraceptive pill, insulin, anti-seizure drugs and anticoagulants.

Set phone alarms on home time for the flight itself. Our guides on the pill abroad and anti-seizure medication cover drug-specific timing.

Long trips: how much to bring and how to refill abroad

Most allowances top out at three months, which shapes long-trip planning. Singapore will not admit more than three months even with approval, Malaysia stops at one month, and Vietnam at 30 days for ordinary medicines.

For stays beyond the limit, you have three options. You can bring the maximum and refill locally, return home to restock, or have supplies sent. Canada allows visitors to receive an additional 90-day supply^[13] every three months by mail or courier, but controlled substances cannot be posted.

Getting enough before you leave is the first hurdle. Our guide on getting an early prescription refill before travel explains how to ask. Then compare sending medication abroad with refilling it locally.

Posting medication is riskier than carrying it. Spain does not permit postal items containing medicines to individuals^[54], according to the USPS country listing. Australia's mail import scheme excludes controlled substances, even ones you could legally carry in person.

Buying replacements locally carries its own risk. WHO estimates that at least 1 in 10 medicines^[53] in low- and middle-income countries are substandard or falsified. Use registered pharmacies and bring your generic name.

If your medication is lost, stolen or confiscated

Act on the day you notice the loss, because some local prescriptions take time. Your letter, generic names and digital records make every step faster.

·
Check your backup supply first: the split packing above exists for this moment.
·
Call your travel insurer's assistance line; many can find a local doctor or pharmacy.
·
See a local doctor with your letter and generic names to get a new prescription.
·
For controlled medicines, contact your embassy or consulate for help.
·
If customs confiscates medication, ask for a written receipt and the legal reason.

Our guide to replacing lost or stolen medications abroad covers how this works in specific countries. For urgent care, see finding a doctor abroad.

Guides by condition and medicine type

This page is the hub of a four-part series. The others cover liquid medication on a plane, refrigerated medication and insulin, and vitamins and supplements on a plane and abroad.

ADHD: 10 things to do before travelling with ADHD medication.
Anxiety: anxiety medication where benzodiazepines are banned.
HIV and PrEP: travelling with HIV medication or PrEP.
Pregnancy: flying while pregnant, including airline cut-offs and letters.
GLP-1 pens: your GLP-1 pen at the airport.

Frequently asked questions

Can you take prescription medication on a plane?

Yes. TSA allows pills in unlimited amounts if screened^[1], in carry-on or checked bags. The UK, EU, Canada and Australia also allow prescription medicines through security. The tighter rules come from customs at your destination.

Do pills have to be in a prescription bottle to fly?

Not for TSA security, which does not require prescription bottles^[1]. Customs is different: CBP says medication should be in its original container, and many countries expect the pharmacy label. Keep original packaging for international trips.

Can I bring a pill organiser through airport security?

Yes. CATSA says a day-by-day pill separator is not an issue for security^[6], and TSA does not require original bottles. For international trips, carry the original boxes too, because customs officers cannot identify loose tablets.

Do I need a doctor's letter to fly with medication?

Security rarely asks for one, except for large liquid volumes in the UK. Customs often does: the UK expects visitors to carry a letter listing how much you have, doses and the strength^[17]. Get one for every international trip.

What is a Schengen certificate for medication?

It is a form under Article 75 of the Schengen Convention for carrying narcotic or psychotropic medicines between Schengen states. It is valid for max. 30 days^[19] and only available to Schengen residents.

How much prescription medication can I bring into another country?

It depends on the country. Japan allows one month of prescription medicine without a permit, Singapore and the UK three months, and Vietnam 30 days. Controlled medicines usually face tighter limits.

Should prescription medication go in checked luggage?

Keep your main supply in hand luggage. TSA strongly recommends carry-on, and TravelHealthPro suggests extra medication in the hold^[52] as a backup. Keep controlled medicines with you.

Is Adderall legal or banned abroad?

Adderall is banned in Japan, where amphetamine cannot be imported, even for treatment^[25], and prohibited in Thailand. Australia covers it under the traveller exemption, and the US treats it as Schedule II. Check our country list before you book.

Can I bring codeine or tramadol on holiday?

Often, but with paperwork. Japan treats codeine as a narcotic needing advance permission, Qatar caps narcotics at 10 days, and the UAE lists both on its controlled list. Carry a prescription and doctor's letter.

Can I post my prescription medication abroad?

Sometimes, but it is riskier than carrying it. Spain does not allow postal items containing medicines to individuals^[54], and Canada bans mailed controlled substances. Check the destination's customs rules first.