Melatonin Is Prescription-Only in These Countries: What Travellers Need to Know

Melatonin is sold freely in some countries but requires a prescription in others. Crossing the wrong border with an unlabelled supplement bottle can create real complications.

The melatonin trap: a supplement in one country, a prescription drug in another

Melatonin sits in a regulatory grey zone that trips up travellers every year. In the United States and Canada, it is sold without a prescription in pharmacies, supermarkets, and petrol stations. Cross into Australia, France, the United Kingdom, Germany, or Portugal, and the same product becomes a prescription-only medicine. The bottle in your luggage does not change, but its legal status does the moment you land.

This article maps out where melatonin is prescription-only, what that means at customs, and what to carry if you rely on it for sleep or jet lag.

Medical disclaimer: This article is for informational purposes only and does not constitute medical advice. Regulations change. Always verify current import rules with the destination country's drug regulator and consult your prescribing clinician before travelling with any medication.

Countries where melatonin is prescription-only

Australia classifies melatonin as a Schedule 4 prescription-only medicine under the Therapeutic Goods Administration's Poisons Standard. The registered brand is Circadin (2 mg prolonged-release). You cannot buy melatonin over the counter at an Australian pharmacy regardless of the dose.^[1]

France requires a prescription for all melatonin products. The Agence nationale de sécurité du médicament et des produits de santé (ANSM) classifies melatonin as a medicament requiring medical authorisation. Circadin is the only licensed brand. Food supplement forms sold online are in a regulatory limbo and are not reliably legal to carry into France. See our melatonin in France guide for broader regulary context and prescribing pathways.

Germany treats melatonin as prescription-only above 0.5 mg per dose. The Bundesinstitut für Arzneimittel und Medizinprodukte (BfArM) notes that low-dose products (0.5 mg) marketed as food supplements exist online, but their import status is contested and customs enforcement is inconsistent.^[2]

The United Kingdom makes melatonin available only on prescription through the NHS or private prescribers. Circadin (2 mg) and Slenyto (paediatric) are licensed by the MHRA. Unlicensed melatonin imports seized at UK borders have increased as travellers bring large supplement supplies from the US.^[3]

Portugal similarly requires a prescription. The INFARMED regulator lists melatonin as a prescription-only medicamento, and pharmacies will not dispense it without one.^[4]

Japan does not approve melatonin as a pharmaceutical product at all. It is not on the Japanese market, and personal import is subject to the Ministry of Health, Labour and Welfare's (MHLW) quantity limits for unapproved drugs. Bringing more than a two-month supply risks confiscation.

South Korea does not register melatonin as an approved medicine either. Customs authorities have discretion over supplement imports, and travellers have had supplies confiscated at Incheon Airport.

China does not authorise melatonin as a licensed pharmaceutical. It exists in a supplement category under the National Medical Products Administration (NMPA), but the regulatory standing is ambiguous. Bringing a small personal supply with a doctor's letter is the safest approach.

Countries where melatonin is freely available

The United States classifies melatonin as a dietary supplement under the FDA's DSHEA framework. It is sold without any prescription at virtually every pharmacy, supermarket, and convenience store. Mexico similarly sells melatonin (Melatonina) without a prescription at chains like Farmacias del Ahorro and Farmacia Guadalajara.

Spain permits low-dose melatonin (up to 1.9 mg) as a food supplement. Higher doses require a prescription. Italy sells melatonin as Melatonina over the counter at pharmacies and parapharmacies. The Netherlands and Ireland also permit low-dose OTC sales, though licensing frameworks vary.

What the prescription-only status actually means at the border

Prescription-only status does not automatically mean your supply will be confiscated. Customs enforcement for supplements is inconsistent. The practical risk depends on two factors: quantity and documentation.

A single strip of 30 tablets in original packaging, accompanied by a doctor's letter stating your name, the medication, the dose, and the duration of travel, is unlikely to cause problems at Australian, French, German, or UK customs. A bulk supply of 300 tablets in an unmarked bag is a different matter.

Australia's TGA explicitly permits travellers to import up to three months' personal supply of a prescription medicine if accompanied by documentation showing it is for personal use. The same principle applies in the UK under MHRA guidance.^[5] Learn more about the import rules through our melatonin in Australia guide.

How to travel with melatonin into prescription-only countries

Get a doctor's letter before you fly. Ask your GP or prescribing clinician for a letter on headed paper. It should state your full name, the medication (generic name: melatonin), the dose, the reason for use, and the length of your trip.

Keep melatonin in its original manufacturer packaging. Decanting tablets into a plain container removes the lot number, expiry date, and product name. Border officials cannot verify what the product is.

Carry it in your hand baggage, not in checked luggage. If checked bags are lost or delayed, you have no access to your supply. Airport security in Australia, the EU, and the UK permits liquid melatonin or standard tablets in hand baggage as a declared medicine.

Bring only what you need for the trip. For Australia, France, Germany, and the UK, a supply matching the length of your stay is unlikely to trigger scrutiny. Bringing six months of tablets to a two-week trip is the pattern that draws attention.

Store your documentation with the Nomedic app. Your International Patient Summary lists your current medications in a standardised format that customs officers and pharmacists abroad can read quickly. It does not replace a doctor's letter, but it supports your case at the border.

The dose split that changes everything

Germany and Spain apply dose thresholds, not blanket bans. In Germany, products up to 0.5 mg occupy an uncertain food-supplement space. In Spain, products up to 1.9 mg are sold as supplements, while anything above requires a prescription. If your standard melatonin dose is 5 mg or 10 mg, as is common in North American products, it sits squarely in prescription territory in both countries.

The clinical evidence base for melatonin in European markets was built around 2 mg (the Circadin dose). High-dose North American formats are not within the European licensed range. This is partly why regulators in France and the UK never approved an OTC pathway.

Getting a local prescription if you run out

In Australia, you can see a GP at a private clinic and request a prescription for Circadin. An initial consultation costs approximately A$80 to A$150 (~$50 to ~$95 / ~€46 to ~€88). Circadin itself costs roughly A$30 to A$50 (~$19 to ~$32 / ~€17 to ~€30) for a 21-tablet pack.

In France, a GP consultation (médecin généraliste) costs €25 to €50 (~$29 to ~$58) before reimbursement. Non-residents typically pay out of pocket unless covered by travel insurance. Circadin at a French pharmacy costs around €12 to €20 (~$14 to ~$23) for a 21-tablet pack.

In the UK, you can access a private GP via services like Babylon or a private walk-in clinic. Consultations run £60 to £120 (~$76 to ~$152 / ~€70 to ~€140). NHS prescriptions are not available to international travellers unless they are accessing emergency care. Bringing your own supply remains the most practical option. Refer to our UK travel guide for context on healthcare services and options for visitors.

Is it illegal to bring melatonin into these countries?

Melatonin is not a controlled substance in any of the countries discussed. It is not scheduled under the 1971 Convention on Psychotropic Substances. The legal issue is not criminal possession but regulatory classification: bringing an unregistered or unlicensed medicine into a country can lead to confiscation, not prosecution.

Japan sits closest to a legal line. The MHLW limits personal import of unapproved drugs to a two-month supply. Exceeding that, or bringing a product without documentation, risks confiscation at customs.^[6] There is no criminal penalty for a traveller carrying a reasonable personal supply for jet lag, but the product may not clear customs.

The practical takeaway: melatonin is not banned in the way that amphetamines or certain opioids are banned. It is, however, regulated as a medicine in Australia, France, Germany, the UK, and Portugal. The safest position is to treat it as a prescription medicine when travelling to those countries: original packaging, a doctor's letter, and a quantity that matches your trip length.

Frequently asked questions

Is it illegal to bring melatonin into Australia?

No, but melatonin is a Schedule 4 prescription-only medicine in Australia. Bringing a personal supply for your trip is permitted under TGA traveller import rules, provided you carry the original packaging and a doctor's letter. Customs will not arrest you for it, but they can confiscate an undocumented supply.

Can I buy melatonin over the counter in France?

No. All melatonin products in France are prescription-only under ANSM regulation. French pharmacies stock Circadin by prescription only. If you need melatonin during your stay, you will need to see a médecin généraliste and pay for a private consultation, typically €25 to €50 (~$29 to ~$58).

Is melatonin banned in Japan?

Melatonin is not approved as a pharmaceutical in Japan and is not sold in Japanese pharmacies. Travellers can bring a personal supply under MHLW rules for unapproved drugs, with a two-month supply being the generally applied limit. Bring a doctor's letter and keep the product in original packaging.

Is melatonin prescription-only in the UK?

Yes. The MHRA registers melatonin (Circadin) as a prescription-only medicine. You cannot buy it OTC at Boots or any UK pharmacy. NHS prescriptions are not available to international travellers. Bring your own supply with a doctor's letter, or see a private GP if you run out.

Can I bring my 10 mg melatonin gummies from the US into Germany?

This is a grey area. German regulations treat melatonin above 0.5 mg as a prescription-only medicine. A 10 mg product from the US is well above that threshold. Carry a doctor's letter, keep the original US packaging, and bring only what you need for your stay. Enforcement at German customs is inconsistent, but documentation protects you.

Where in Europe can I buy melatonin without a prescription?

Spain permits melatonin as an OTC supplement up to 1.9 mg per dose, available at Spanish pharmacies and parapharmacies. Italy sells melatonin (Melatonina) without a prescription. France, Germany, the UK, and Portugal all require a prescription. The Netherlands permits low-dose OTC forms.