Can You Buy Melatonin in the UK? Melatonin UK Law, Gummies, Doses and Alternatives

Is melatonin illegal in the UK?

No, melatonin isn’t illegal in the UK, but it is legal only as a prescription medicine. You can’t buy it from a supermarket, health food shop or pharmacy counter without a prescription, and UK sellers can’t legally sell melatonin supplements or gummies. It is not a controlled drug, so simply owning it isn’t a criminal offence.

Herbal teas are another legal option for your evening routine; see the best tea for sleep ranked by evidence.

The law is aimed at sellers. Under regulation 214 of the Human Medicines Regulations 2012, a prescription-only medicine can’t be sold or supplied except in line with a prescription from a doctor, dentist or other qualified prescriber. That is why melatonin listings on UK shelves and marketplaces are illegal, even though the person who buys a pack isn’t committing an offence by owning it. We can’t give legal advice, but this is the position in plain terms.

The rules are very different elsewhere, which is why so many people are confused. In the US it is sold as a dietary supplement, and some EU countries allow low-dose food supplements.

Where can you buy melatonin in the UK?

Can you buy melatonin over the counter in the UK?

No. Melatonin is a prescription-only medicine in the UK, so pharmacies, supermarkets and health food shops can’t sell it over the counter. The MHRA treats any product containing melatonin, including gummies, sprays and teas, as a medicine. A GP can prescribe it, usually as 2mg prolonged-release tablets for adults aged 55 and over.

Legally, only with a prescription. Here is how that plays out in the places people search for:

• Boots, Superdrug, Holland and Barrett and supermarkets. They can’t sell melatonin off the shelf. A pharmacy can only dispense it against a prescription.
• Amazon, eBay, Temu and other marketplaces. Listings do appear, but they are illegal. A Which? investigation published in February 2026 found melatonin capsules, gummies, patches and teas listed on AliExpress, Amazon, eBay, Etsy, Superdrug Marketplace and Temu between October 2025 and January 2026. Many were 10mg, the maximum dose a specialist would prescribe, and one claimed 30mg. Some hid the word with misspellings. Most were taken down once Which? flagged them.
• Online pharmacies and online doctors. This is a legal route if you are prescribed it after a proper consultation. Before you order, check the pharmacy is on the General Pharmaceutical Council’s register, as the MHRA advises.
• Overseas supplement websites. The MHRA advises getting medicines only from a trusted source, and you can’t be sure what is in an overseas product. More on that below.

The MHRA treats any product containing melatonin as a medicine, so patches, sprays, teas and “sleep” gummies sold without a prescription fall under the same rules as tablets.

Why is melatonin prescription-only in the UK?

Melatonin isn’t banned. It is a hormone your body makes naturally, and taking it as a tablet has a direct effect on how your body works. That is why the UK medicines regulator, the MHRA, treats it as a medicine rather than a food supplement. Speaking to Which?, the MHRA said melatonin is considered to pose “an identifiable risk to public/patient safety”. Medicines have to be licensed, made to a checked standard and supplied by a prescriber who can decide if they are right for you.

There are good reasons for caution. It can interact with other medicines, isn’t suitable for some people (such as those with autoimmune conditions or liver problems), and unlicensed supplements are often inaccurately labelled. In a Canadian study of 31 melatonin supplements, the actual melatonin content ranged from 83% less to 478% more than the label said, and eight also contained serotonin.

Is melatonin a hormone?

Yes. Melatonin is a hormone made by the pineal gland, a small gland in the brain. The NHS describes it as a hormone made by your body which regulates your sleep and wake cycle. Levels rise as it gets dark, peak in the early hours and fall in daylight, helping set your sleep and wake cycle. Tablets add to that natural supply, which is why the UK treats melatonin as a medicine.

Is melatonin a sleeping pill? In prescribing terms, yes. The BNF, the reference UK prescribers use, lists melatonin in the same group as sleeping medicines such as zopiclone and zolpidem (non-benzodiazepine hypnotics and sedatives). It works in a different way, though: it is a copy of a hormone your body makes, and the tablets add to your body’s own supply. So it is classed as a sleep medicine, but it isn’t the same kind of drug as zopiclone.

It is a similar story to CBD: a few cannabis-based medicines are prescription-only, while CBD food supplements follow separate rules. See prescription CBD vs over-the-counter CBD for how that split works.

How to get melatonin in the UK

Start with your GP. GPs will usually look for the cause of your poor sleep first and suggest changes to your sleep habits or cognitive behavioural therapy for insomnia (CBT-I), which can be face to face or through an online programme. Registered online pharmacies can also supply melatonin on a private prescription after an online consultation; check they are registered with the General Pharmaceutical Council.

Can you buy melatonin online in the UK?

Only with a prescription. Searches for “buy melatonin online” or “melatonin for sale” bring up overseas shops and marketplace listings, but websites selling melatonin to UK customers without a prescription are breaking the law. Owning melatonin isn’t a criminal offence, but parcels of unlicensed medicines can be stopped and seized at the border.

Enforcement is real. Between December 2024 and May 2025, the MHRA seized 7.7 million doses of illegal medicines in the UK, including prescription-only sleeping pills, and its advice is to only get medicines from a trusted source. A legal online route does exist: a registered online pharmacy or online doctor can supply melatonin on a private prescription after a proper consultation.

The bigger issue is quality. Overseas supplements aren’t checked to UK medicine standards. A 2023 analysis of 25 melatonin gummy brands sold in the US found only 3 contained within 10% of the amount on the label; the rest ranged from 74% to 347% of the stated dose, and one contained no melatonin at all. Five of the products also contained CBD, all at more than their labels said. If you want to try melatonin, a prescription is the safest route. Read more about melatonin vs CBD.

The MHRA’s #FakeMeds campaign warns that unregulated websites can sell fake or contaminated medicines and put your card details at risk. In Great Britain you can check any online pharmacy against the General Pharmaceutical Council’s register before you buy.

Can you bring melatonin into the UK?

Melatonin isn’t a controlled drug, and in its February 2026 investigation Which? said that this means it isn’t illegal to bring it back from another country. We couldn’t find an MHRA or gov.uk page that sets out a personal allowance for melatonin, so treat that as the general position rather than a guarantee. It isn’t the same as it being a good idea either: you are still taking an unlicensed product with an uncertain dose, and having more sent to you by post isn’t a reliable or recommended route, as parcels can be seized.

If a doctor abroad has prescribed melatonin for you, keep it in its original packaging with the prescription or a letter from your prescriber, and only carry what you need. The gov.uk guidance on travelling with medicines is the place to check current rules; we can’t give legal advice. Once you are home, speak to your GP if you still need help with sleep.

Can you buy melatonin gummies in the UK?

No. Melatonin gummies can’t legally be sold in the UK, in shops or online, because melatonin is a prescription-only medicine here and the MHRA treats any product containing it as a medicine. That includes US brands such as ZzzQuil PURE Zzzs, OLLY Sleep and Lemme Sleep. A prescriber can supply melatonin, usually as tablets, capsules or a liquid.

Is it illegal to have them? No: melatonin isn’t a controlled drug, so the law is aimed at sellers, not at you. No UK shop or website can legally sell you melatonin gummies. The MHRA told Which? that it considers any product containing melatonin to be a medicine, even skincare applied to the skin, so a gummy is treated exactly like a tablet. Gummies were the most common form Which? found listed illegally, often marketed as food supplements, and some listings hid the word melatonin on the label.

What about Vicks ZzzQuil and OLLY melatonin gummies?

Vicks ZzzQuil gummies on TikTok. UK Google searches for “Vicks melatonin gummies” have jumped this autumn. These are ZzzQuil PURE Zzzs, a US range from the makers of Vicks (checked October 2026 on the brand’s own US site):

• The range includes PURE Zzzs Melatonin Gummies (2mg melatonin), Triple Action gummies (6mg) and Advanced gummies (10mg).
• The brand says the adult gummies are for ages 18 and up, are made in the USA and are regulated in the US as dietary supplements.
• They are not licensed medicines in the UK, so they can’t legally be sold here. Seeing them in a US video doesn’t change UK rules.

What about OLLY Sleep gummies? OLLY is a US brand. Its Sleep gummies contain 3mg of melatonin per 2-gummy serving, plus L-theanine, chamomile, passionflower and lemon balm extracts (checked November 2026 on olly.com). Because they contain melatonin, the MHRA’s position applies: they can’t legally be sold in the UK as a food supplement.

Evopure isn’t connected with Vicks, ZzzQuil, OLLY or their owners. The point is simply that a 10mg gummy contains five times the usual UK starting dose of 2mg, and in the UK melatonin is only supplied after a prescriber has checked it suits you. If you think melatonin might suit you, speak to your GP or pharmacist.

Is it safe to buy melatonin gummies from abroad?

It isn’t recommended. The MHRA’s #FakeMeds campaign warns that unregulated websites can sell fake, contaminated or wrongly dosed medicines. In a 2023 US study of 25 melatonin gummy brands, only 3 contained within 10% of the amount on the label. If you want to try melatonin, ask your GP.

Looking for a gummy you can legally buy here? Our guide to sleep gummies in the UK compares melatonin-free options, what’s in them and the 5-HTP and sweetener cautions.

Are melatonin gummies safe for children?

Not as a home remedy. In the UK, melatonin for children is a prescription medicine, started by a specialist for longer-term sleep problems, often in children with ADHD, autism or learning disabilities, at a low dose the doctor adjusts. Gummies bought online can contain a different dose from the label, and because they look and taste like sweets, children can eat several.

The US experience shows why. Melatonin gummies look and taste like sweets. US poison centres recorded 260,435 melatonin ingestions in children and teenagers between 2012 and 2021, with yearly reports rising by 530%, mostly accidental swallowing by children aged 5 and under. A later CDC report estimated around 11,000 emergency department visits for unsupervised melatonin ingestion by young children between 2019 and 2022.

It has happened in the UK too. In August 2025 the MHRA told parents to stop giving children Nutrition Ignition Kids Magnesium Glycinate Gummies, sold online as a food supplement, after tests found 1.5mg to 1.7mg of undeclared melatonin in each gummy. It advised keeping any left in a tamper-proof container out of children’s reach until they could be taken to a pharmacy for disposal, and reporting side effects through the Yellow Card scheme. See are magnesium gummies safe for kids?

If your child struggles to sleep, start with their GP or health visitor. Keep any medicines and supplements, including adult ones, out of children’s sight and reach. All Evopure products are for adults (18+) only. For general advice on routines, see ADHD and sleep and our sleep hygiene guide.

Melatonin doses in the UK: is 10mg too much?

10mg is the very top of the UK range, not a starting dose. The BNF sets out these doses for prescribed melatonin:

So a 10mg tablet or gummy is the maximum daily dose a specialist would prescribe after starting lower, which is why Which? flagged the many 10mg products listed illegally. More isn’t automatically better, and unlicensed products often don’t contain what the label says anyway (see buying online).

Melatonin dosage for adults

According to the BNF, prescribed adult doses of melatonin in the UK range from 1mg to 6mg, always short-term: 2mg prolonged-release once a day for insomnia in adults aged 55 and over, for up to 13 weeks, or 3mg for jet lag, which can be lowered to 1 or 2mg or raised to 5 or 6mg, for up to 5 days.

The usual UK adult dose is one 2mg prolonged-release tablet (Circadin) once a day, 1 to 2 hours before bed and after food, for up to 13 weeks. It is licensed for adults aged 55 and over with short-term insomnia. For jet lag, the BNF dose is 3mg at bedtime after arrival, for up to 5 days.

“Melatonin 2mg tablets” usually means Circadin or a generic prolonged-release version. Like all melatonin in the UK, they are prescription only (see how to get melatonin).

iIf you have taken more than prescribed, the NHS says an extra dose may make you feel sleepy and is unlikely to cause problems, but speak to a pharmacist as soon as possible if you have new symptoms, or call 111. Never take 2 doses to make up for a forgotten one.

Does melatonin work, and how long does it take to kick in?

It works, but modestly. A review of 19 controlled trials involving 1,683 people found melatonin helped people fall asleep about 7 minutes faster and sleep about 8 minutes longer than placebo, with slightly better sleep quality. The benefit didn’t wear off with continued use.

Melatonin is best at shifting the timing of sleep rather than knocking you out. That’s why it is used for jet lag and body-clock problems. If stress, a racing mind, pain or poor sleep habits are keeping you awake, melatonin may not tackle the cause. The usual tablet is taken 1 to 2 hours before bedtime. If you keep waking in the night rather than struggling to drop off, our guide on how to stay asleep covers the common causes.

Does melatonin help you stay asleep?

Not much, for most people. The evidence for melatonin is mainly for falling asleep sooner and for body-clock problems such as jet lag, and in trials it added only about 8 minutes of sleep. The exception is Circadin, the 2mg prolonged-release tablet licensed for short-term insomnia in adults aged 55 and over, which releases melatonin through the night.

iIn Circadin’s trials, people reported better sleep quality, fewer night awakenings and better morning alertness than on placebo. If night waking is the main problem, see your GP.

How long does melatonin take to work? Allow 1 to 2 hours for the usual tablet: Circadin’s product information says to take it 1 to 2 hours before bedtime and after food. The NHS says melatonin liquid is taken 30 minutes to 1 hour before bedtime. Standard tablets used for jet lag are best taken 2 hours before or 2 hours after eating. If you want to fall asleep sooner tonight without medicine, try the techniques in how to fall asleep fast.

How long does melatonin stay in your system?

Not long. Standard (immediate-release) melatonin has a half-life of about 45 minutes, a 2015 review of 22 studies found, so most of a dose has left your blood within about 4 to 5 hours. Circadin, the 2mg slow-release tablet usually prescribed in the UK, releases melatonin gradually through the night: its product information gives a half-life of 3.5 to 4 hours, with levels peaking about 3 hours after a dose taken with food. If you feel sleepy the next morning, don’t drive or use machinery.

Can you take melatonin every night? Only as prescribed. For short-term insomnia it is usually prescribed for 1 to 4 weeks, and for no more than 13 weeks. A specialist may prescribe it longer term for some types of insomnia. If sleep problems carry on after a course, speak to your doctor rather than carrying on with tablets of your own.

Is melatonin addictive? It isn’t thought to be. In Circadin’s trials, sleep gradually returned to how it was before treatment when people stopped, with no rebound insomnia or withdrawal symptoms reported. If you have taken it for a long time or are worried about dependence, ask your doctor or pharmacist before stopping.

Melatonin vapes: are they legal or safe?

Melatonin vapes, sometimes sold as “sleep vapes”, have been gaining popularity as a sleep aid, especially among teenagers, according to US researchers. In the UK they can’t legally be sold: the MHRA considers any product that contains melatonin to be a medicine, and no melatonin vape is licensed here. The BNF lists melatonin only as tablets, capsules and a liquid you drink.

Safety is largely unknown. A 2024 laboratory study tested three commercially available melatonin vapes and found potential contaminants, including other pharmaceuticals and industrial chemicals, and changes in human airway cells exposed to the vapour; the authors said more research is needed. The NHS is clear that vaping is not risk-free and that non-smokers and under-18s shouldn’t take it up. If sleep is the problem, a vape isn’t the answer. If you were wondering about CBD, see can you vape CBD oil?

Melatonin for jet lag

Jet lag is one of the few reasons adults under 55 may be prescribed melatonin, usually privately. According to the BNF, the usual dose is one 3mg standard tablet, taken at your normal bedtime once you arrive, but not before 8pm or after 4am. It is taken for up to 5 days per trip, the dose can go up to 6mg if needed, and you shouldn’t use more than 16 courses a year.

Light timing matters just as much. Our jet lag guide explains how to use daylight and sleep timing to adjust faster, and the circadian rhythm guide explains why.

Side effects, interactions and who should avoid it

Not everyone gets side effects. The NHS lists daytime sleepiness, headaches, stiff or painful joints, and feeling or being sick. Don’t drive, ride a bike or use machinery after taking melatonin, because it can make you sleepy. Serious side effects are rare.

The NHS says melatonin may not be suitable if you have epilepsy, liver or kidney problems, or an autoimmune condition such as lupus or psoriasis. Tell your doctor about any medical conditions, and if you smoke.

Melatonin and alcohol: try to avoid them together. The NHS says alcohol can stop melatonin working properly and increase your chance of side effects, and the Circadin product information says alcohol shouldn’t be taken with the tablet because it makes it less effective on sleep. Alcohol also breaks up sleep on its own; see alcohol and sleep.

Medicines. The NHS lists medicines that may not mix well with melatonin, including NSAIDs such as ibuprofen, medicines that cause drowsiness such as zopiclone, warfarin, some antidepressants (such as fluvoxamine), carbamazepine, the combined contraceptive pill and HRT. Always tell your doctor what else you take, including herbal remedies, vitamins and supplements.

Pregnancy and breastfeeding. The NHS says melatonin is not usually used during pregnancy or while breastfeeding. If you’re breastfeeding, tell your doctor, who may prescribe something else, and don’t share a bed with your baby after taking melatonin or any medicine that makes you drowsy.

What you can buy without a prescription in the UK

The first-line help for long-term poor sleep in the UK isn’t a pill at all. The NHS says insomnia usually gets better by changing sleep habits, and GPs now rarely prescribe sleeping pills. NICE recommends the Sleepio digital CBT-I programme for insomnia in primary care, for people who would otherwise be offered sleep hygiene advice or sleeping pills, and some areas fund similar programmes. Ask your GP what is available near you, and see our insomnia guide for how CBT-I works. For long-term insomnia where CBT-I hasn’t worked or isn’t available, NICE also recommends a newer prescription medicine called daridorexant (Quviviq). It isn’t melatonin: it is for adults whose insomnia happens at least 3 nights a week for 3 months or more and badly affects their day, and treatment should be reviewed within 3 months. Our middle insomnia guide explains where it fits.

Sleep habits come first, because they cost nothing and help your own melatonin rise on time (see below and our 60-minute bedtime routine). Alongside that, many people build a calmer evening routine with things they can buy legally in UK shops. None of these is a substitute for prescribed treatment, and none works in the same way as melatonin. For a ranked look at the evidence, see our guide to natural sleep aids and sleep supplements in the UK, and for chewables, melatonin-free sleep gummies.

Our Magnesium Glycinate Sleep Complex combines magnesium bisglycinate and citrate with glycine, L-theanine and botanicals as a warm evening drink. Our Sleep CBD Oil pairs broad spectrum CBD with passionflower and a terpene blend. Neither is a replacement for melatonin or for medical advice. For a side-by-side look at how they differ, see CBD oil vs melatonin. Compare options in our best CBD oil for sleep guide.

The FSA’s 10mg a day figure is precautionary advice rather than a legal limit, set while longer-term safety research continues. At Evopure we think it is a very cautious figure, and many adults use more. If you go above it, increase slowly, and check with your GP or pharmacist first if you take any medication.

We don’t recommend our products during pregnancy or breastfeeding. All our products are for adults (18+) only.

Ways to boost your own melatonin

Your body makes melatonin as it gets dark. You can help it along:

• Get daylight in the morning. Bright light early in the day helps set your body clock, so melatonin rises at the right time in the evening.
• Dim the lights in the evening and cut back on screens in the hour before bed. See do blue light glasses help?
• Keep regular hours, including at weekends. Our sleep schedule guide shows how to reset yours.
• Keep your bedroom dark, with blackout blinds or an eye mask.
• Cut back on alcohol and late caffeine, which both disrupt sleep.

The clocks go back on 25 October, which can unsettle sleep for a week or so. See our guide to sleeping well when the clocks go back, plus natural remedies for insomnia. If you work nights, our shift work and sleep guide covers light and timing in detail.

Related guides

• Valerian vs melatonin and what the research shows.
• Jet lag: what the evidence says about melatonin, light and sleep timing.
• Ashwagandha has been compared with melatonin in a 2026 trial: see ashwagandha for sleep.
• Circadian rhythm disorders and how they are treated.
• GABA vs melatonin and other UK sleep options.
• If anxiety about not sleeping is the real problem, see sleep anxiety: what helps.
• ADHD and sleep for non-medicine tips and when melatonin is prescribed.
• Curious about food sources? See does kiwi contain melatonin?
• Some people look at 5-HTP instead, because the body can turn it into melatonin. Read what the evidence says about 5-HTP and who should avoid it.
• Your body makes melatonin from serotonin, which starts as tryptophan. See tryptophan vs 5-HTP vs melatonin.
• Glycine is another amino acid people take in the evening: see glycine for sleep.
• Parents: some children’s magnesium gummies bought online have been found to contain melatonin; see are magnesium gummies safe for kids?.
• For the signs that point to a breathing problem rather than insomnia, see sleep apnoea symptoms and NHS tests.
• For what is in over-the-counter sleep capsules instead, see our guide to sleep capsules and their ingredients.
• If you were hoping to give melatonin, our guide to sleep gifts has UK-friendly alternatives.
• Searching for CBD melatonin gummies? Our guide to Naturecan CBD and melatonin gummies explains UK availability.
• Some UK sleep gummies are made without melatonin, for example Cannaray’s Good Night CBD gummies.
• Tart cherries contain a little natural melatonin, which is the idea behind the sleepy girl mocktail.
• Twinings sells a melatonin tea only in the US; Twinings Sleep tea in the UK contains no melatonin.
• Seen Kourtney Kardashian’s brand on TikTok? Our guide to Lemme Sleep gummies and the UK explains what’s in them (5mg melatonin per serving) and why UK shops can’t sell them.
• Taking a GLP-1 medicine? See Mounjaro and sleeping tablets like zopiclone.
• Chamomile is the most studied of these herbs as a tea; see chamomile tea at night for what the trials found and the side effects.
• Strange dreams are a common side effect of melatonin; our guide to vivid dreams covers other medicines that affect dreaming.
• Before reaching for melatonin, try fixing your times: see the best time to go to bed and wake up.
• Some EU CBD brands sell melatonin sleep products online; see our Cibdol guide for what to know before ordering to the UK.
• Looking at melatonin-free patches? See what’s in Kloris sleep patches.
• Over-the-counter sleeping tablets
• Zopiclone: the prescription Z-drug explained