From Sudafed to ADHD prescriptions, common over-the-counter and prescription drugs from the US can lead to confiscation, fines, or arrest at foreign borders. Here’s what travelers need to know before they pack.
Most American travelers assume that medications they bought legally at a US pharmacy will be welcome anywhere they go. That assumption is wrong often enough — and consequentially enough — that the US State Department maintains a country-by-country list of prescription and over-the-counter drug restrictions. In some destinations, common American medications can result in fines, confiscation, or in extreme cases, arrest and criminal charges.
Here are eight that catch travelers off guard most often, with the actual restrictions in each destination.
1. Adderall and other ADHD stimulants in Japan
Adderall — a Schedule II controlled substance in the US prescribed to roughly 16 million Americans — is completely illegal in Japan. The active ingredient amphetamine is classified under Japan’s Stimulants Control Act, and importing it can result in arrest, deportation, and criminal prosecution. The US Embassy in Tokyo specifically warns travelers: “Possession of Adderall in Japan is illegal and may result in arrest.” Even with a US prescription, no exception applies.
Alternatives accepted in Japan include Concerta and Ritalin (with proper documentation through Japan’s Yakkan Shoumei import certificate process), but the certificate must be obtained before arrival.
2. Sudafed and pseudoephedrine products in Japan and Mexico
Pseudoephedrine — the active ingredient in many American cold and allergy medications including some Sudafed formulations — is illegal in Japan and heavily restricted in Mexico. Japan classifies it as a stimulant under the same law as amphetamines. Travelers carrying Sudafed have been arrested at Japanese airports.
Mexico’s restrictions are slightly different: pseudoephedrine has been removed from over-the-counter sale entirely as part of the country’s anti-meth-precursor laws. Bringing it across the border is permitted only with a US prescription clearly indicating personal medical use, in original packaging, and only in quantities consistent with a personal supply.
3. CBD products in most of Asia and the Middle East
Despite being federally legal in the US since the 2018 Farm Bill, CBD products remain illegal or strictly controlled in most Asian and Middle Eastern countries. Singapore classifies CBD under its Misuse of Drugs Act with possession penalties up to 10 years in prison. The United Arab Emirates has previously charged tourists for trace amounts of CBD detectable in food products. Hong Kong reclassified CBD as a “dangerous drug” in 2023, putting it on the same legal footing as cocaine and heroin.
Travelers carrying CBD oil, gummies, or topical creams have been arrested at airports in all three jurisdictions. The “but it’s legal where I bought it” defense does not apply.
4. Codeine-containing pain relievers in Greece and parts of the Middle East
Tylenol with codeine, common cough syrups containing codeine, and similar prescription products are restricted in Greece, the United Arab Emirates, Saudi Arabia, and several other countries. The UAE in particular requires a notarized prescription translated into Arabic, and even then, certain codeine formulations are not permitted at all.
Greek law classifies codeine-containing products under controlled substance regulations. Travelers can bring these medications with proper prescription documentation, but quantities are limited to a personal supply (typically 30 days) and the medication must be in original packaging.
5. Inhalers containing certain ingredients in Singapore
Singapore restricts certain asthma inhalers — particularly those containing ephedrine — under the same laws that govern controlled stimulants. Albuterol-only inhalers are generally permitted with documentation. Combination inhalers containing other ingredients require advance approval through the Health Sciences Authority.
The general rule for Singapore: any medication not in its original pharmacy packaging with a clearly readable prescription label can be questioned at the border, regardless of what it actually is.
6. Melatonin in much of Europe and the UK
Melatonin is sold over-the-counter in the US as a sleep aid. In the European Union and the United Kingdom, melatonin is classified as a prescription-only medicine, regulated under medicinal product rules. Travelers can technically bring personal-use quantities, but selling, sharing, or carrying commercial-quantity amounts can result in confiscation.
The practical issue most travelers encounter isn’t legal trouble — it’s that the supply they brought runs out and they can’t replace it without a doctor’s visit.
7. Tramadol and similar pain medications in Egypt
Egypt has some of the world’s strictest controls on tramadol, which is widely prescribed in the US for moderate pain. Egyptian law treats tramadol as a controlled narcotic, and possession without proper documentation can result in criminal charges. The case of British tourist Laura Plummer, who was arrested in 2017 carrying tramadol and sentenced to three years in prison, became a high-profile cautionary tale.
Travelers carrying tramadol to Egypt need: a current prescription, the medication in original pharmacy packaging, and ideally pre-approval through the Egyptian embassy in their country of origin.
8. Vicks VapoRub and inhalers in Japan
This one catches Americans off guard because Vicks is sold over-the-counter at every drugstore in the US. The Vicks VapoInhaler — the small plastic nasal stick — contains levomethamphetamine, a structural cousin of methamphetamine. Japan’s strict Stimulants Control Act classifies it as a banned substance.
Vicks VapoRub (the topical chest rub) is generally permitted because the levels of restricted ingredients are too low to qualify under the law, but the inhaler version is not. Travelers have had Vicks inhalers confiscated at Japanese airports for this reason.
What to do before any international trip
The State Department maintains a country-specific page at travel.state.gov for every destination, including a “Special Circumstances” section that flags medication restrictions. The International Narcotics Control Board also publishes an annual “Yellow List” of substances controlled internationally.
For any prescription medication, travelers should:
Carry medications in original pharmacy packaging with the prescription label visible. Loose pills in a pill organizer are far more likely to be questioned at customs than the same medications in their original bottles.
Bring a copy of the prescription itself, ideally with the generic name of the drug rather than just the brand name. Doctors can typically print a “travel letter” stating that the medication is necessary for the patient’s health.
For destinations with the strictest restrictions (Japan, UAE, Saudi Arabia, Singapore), check the embassy website of the destination country before traveling, not just the US State Department site. Some countries publish their own restricted-substance lists with country-specific requirements.
When in doubt, declare. Customs officers in most countries respond more favorably to travelers who proactively declare medications and present documentation than to those who don’t mention them and get caught during a random search.
