Melatonin is legal throughout Europe, but how you can get it varies dramatically by country. Unlike the United States, where melatonin is sold freely as a dietary supplement in any dosage, most European countries classify it as a medicine. That means in many places you’ll need a prescription, while in others you can buy low-dose versions over the counter or as a food supplement.
Why Europe Treats Melatonin Differently
The European Union has no single, unified rule for melatonin. Each member state sets its own classification, deciding whether melatonin counts as a prescription medicine, an over-the-counter medicine, or a permitted ingredient in dietary supplements. The result is a patchwork where the same 1 mg tablet might sit on a pharmacy shelf in one country and require a doctor’s visit in another.
The one consistent thread: the European Medicines Agency (EMA) approved a prescription slow-release melatonin product for adults aged 55 and over with primary insomnia. That approval applies across the EU. Beyond that specific use, countries diverge. Immediate-release melatonin at low doses (typically 1 mg or less per serving) is allowed in food supplements in some countries, while others treat any melatonin product as a medicine regardless of dose. The European Food Safety Authority has authorized one specific health claim for supplements: that melatonin “contributes to the reduction of time taken to fall asleep,” but only when a product contains 1 mg per portion taken close to bedtime.
Country-by-Country Breakdown
United Kingdom
Melatonin is classified as a medicine in the UK and is available by prescription only. You cannot buy it over the counter in pharmacies or health food shops. Doctors can prescribe doses ranging from 2 to 10 mg for sleep disorders, including off-label use in children with neurological conditions, though prescriptions for children are typically reviewed every six months.
Germany
Germany allows low-dose melatonin in food supplements, but the German Federal Institute for Risk Assessment (BfR) has issued pointed warnings that these products are “not a gentle sleeping aid.” The BfR has flagged that some over-the-counter supplements actually contain more melatonin than prescription drugs, raising safety concerns. Higher-dose and slow-release formulations require a prescription. Germany’s regulatory stance sits in a middle ground: you can technically buy a low-dose supplement, but authorities actively discourage unsupervised use.
Sweden and the Nordic Countries
Sweden classifies melatonin as a prescription-only medicine. The approved prescription indication covers adults over 55, and doctors can also prescribe it off-label for children. Pediatric prescribing in Sweden grew significantly between 2006 and 2017, but all of it goes through a physician. Norway and Denmark follow similar prescription-based models, though some Nordic countries have begun allowing limited OTC availability for adults in recent years.
France, Italy, and Southern Europe
Several southern European countries permit melatonin in dietary supplements up to country-specific dose limits. France, for example, allows supplements containing up to about 2 mg. Italy similarly permits low-dose melatonin supplements. In both countries, higher doses or slow-release formulations are treated as medicines requiring a prescription. Spain follows a comparable model, with low-dose supplements available in pharmacies and health food stores.
Poland
Poland is a notable exception in Europe. It has a more permissive approach, with melatonin available in supplement form without prescription. Interestingly, even slow-release melatonin is not automatically classified as a prescription medicine there, making Poland an outlier among EU member states.
What Travelers Need to Know
If you’re flying from the US or another country where melatonin is freely sold, you can generally bring it into Europe for personal use. German customs rules, which reflect a common European approach, allow travelers to carry medicines in quantities covering up to three months of personal supply. This applies even if the product isn’t registered or approved in the destination country.
There’s an important catch. Products classified as ordinary supplements in the US may be treated as medicinal products under European law. If your melatonin bottle is marketed as treating insomnia or another condition, it falls under medicines regulations in most EU countries. For travel within the Schengen zone, this is rarely an issue at customs for small personal quantities. But if you’re entering from outside Schengen and carrying a product that’s prescription-only in your destination country, having a note from your prescribing doctor (ideally a multilingual certificate specifying the active ingredient, daily dose, and trip duration) can prevent any complications.
In practical terms, travelers carrying a bottle of melatonin gummies in their luggage are unlikely to face problems. Border officials are focused on controlled substances, not sleep supplements. But technically, the legal framework does apply.
Buying Melatonin While in Europe
Your options depend entirely on where you are. In countries that allow supplement-level melatonin (Germany, France, Italy, Spain, and others), you can find products in pharmacies and sometimes in health food stores or online. Doses are typically capped at 1 to 2 mg per serving. If you’re used to taking 5 or 10 mg tablets from the US, you won’t find anything comparable without a prescription.
In prescription-only countries like the UK and Sweden, your only legal route is seeing a doctor. Some travelers work around this by ordering from online retailers based in countries with looser rules, but this sits in a legal gray area, and quality control can be poor. A 2017 study published in the Journal of Clinical Sleep Medicine found widespread problems with over-the-counter melatonin products: actual melatonin content frequently didn’t match what the label claimed, sometimes by a wide margin.
Safety Concerns Behind the Regulations
Europe’s stricter approach isn’t arbitrary. The EMA’s risk management plan for melatonin identifies several areas where evidence is incomplete, including long-term safety, effects during pregnancy and breastfeeding, and the potential for delayed sexual maturation in children. Product labels for prescription melatonin in the EU must warn that long-term effects haven’t been adequately studied, and children taking it are supposed to be monitored by a doctor every six months.
The BfR in Germany specifically warns against uncontrolled use by children, adolescents, pregnant and breastfeeding women, and people with pre-existing medical conditions. These aren’t just theoretical concerns. Melatonin is a hormone, and European regulators take the position that dosing a hormone, even a naturally occurring one, deserves medical oversight. The American model of selling 10 mg gummies next to the vitamins strikes most European health authorities as insufficiently cautious.
None of this means melatonin is dangerous at low doses for healthy adults. It means Europe applies the precautionary principle more aggressively than the US does, particularly where hormones are involved. If you’re traveling or relocating and rely on melatonin for sleep, bringing your own supply for the short term and then consulting a local doctor for longer stays is the most straightforward path.