Key takeaways
- No, you can't buy melatonin over the counter in the UK. It's a prescription-only medicine.
- That's why the melatonin gummies you see in US shops aren't on UK shelves.
- Buying it from overseas websites means no checks on what's actually in the product.
- For ongoing sleep problems, the NHS first recommends sleep habits and CBT for insomnia, not pills.
In this guide
Why is melatonin prescription-only in the UK?
Melatonin is a hormone your body makes in the evening to signal that it's time to sleep. In the US it's sold as a food supplement, so you'll see it in sweets, gummies and sprays.
In the UK, melatonin is classed as a medicine, regulated by the MHRA. That means it can only be supplied on prescription, and it can't legally be sold as a food supplement.
What this means in practice: any UK shop or website selling melatonin supplements to the public without a prescription isn't following UK rules. The NHS explains how prescribed melatonin is used on its melatonin medicine page.
When might a GP prescribe melatonin?
Melatonin isn't a first-line treatment for most adults with poor sleep. According to the NHS, it may be prescribed in some situations, for example:
- Short-term treatment of insomnia in adults aged 55 and over
- Some children and young people with sleep problems, usually under specialist advice
- Specific circumstances such as jet lag, at a doctor's discretion
Your GP will usually look at the cause of the sleep problem first. The NHS insomnia page covers what to expect.
What about buying melatonin online from abroad?
It's easy to find melatonin on international websites and marketplaces. The problem is quality control.
Why it's a risk: products bought outside the UK system haven't been checked by UK regulators. Independent testing in other countries has found melatonin gummies containing much more or much less melatonin than the label says. If you think you need melatonin, speak to your GP or pharmacist rather than ordering it online.
Melatonin can also interact with medicines, including some blood thinners and epilepsy treatments, and it isn't suitable for everyone. That's part of why it's a prescription medicine here.
UK vs US: why the shelves look so different
| UK | US | |
|---|---|---|
| Legal status | Prescription-only medicine | Dietary supplement |
| Where you get it | From a GP or specialist, via a pharmacy | Supermarkets, pharmacies, online |
| Typical form | Licensed tablets or liquid | Gummies, sprays, tablets |
| Dose checks | Licensed medicine standards | Supplement rules; labels can vary |
What you can do instead
For most people, the most effective changes are free. The NHS recommends:
- Going to bed and getting up at the same time every day, weekends included
- Keeping the bedroom dark, quiet and cool
- Cutting caffeine after lunchtime
- Putting screens away an hour before bed
- Getting daylight in the morning
If poor sleep has lasted months, ask your GP about CBT for insomnia (CBT-I), which NICE recommends as a first treatment.
Some people also like a melatonin-free evening supplement as part of a wind-down routine. We compare the options in our guide to non-melatonin sleep supplements and which herbal sleep aids have evidence.
Melatonin-free · halal approved · vegan
BioSnooze
- 350mg Montmorency tart cherry and 250mg KSM-66 ashwagandha, with passion flower, chamomile, lemon balm and lavender
- Pantothenic acid contributes to normal mental performance
- Vitamin B6 contributes to the normal functioning of the nervous system
HALAL10 10% off your first order
Shop BioSnooze →The botanicals are included for their traditional use; food supplements can't make sleep claims in the UK.
Questions people ask
Can I buy melatonin at Boots or Superdrug?
Not without a prescription. UK pharmacies can only supply melatonin when it's been prescribed.
Is it illegal to bring melatonin back from the US?
Rules on importing medicines for personal use are complicated. The safer route is to speak to your GP, who can prescribe a licensed product if it's right for you.
Why do some UK websites sell melatonin?
Some are overseas sellers shipping to the UK, and some aren't following UK rules. Either way, the product hasn't been checked to UK medicine standards.
Is there a natural alternative to melatonin?
No supplement can legally claim to improve sleep in the UK. Sleep habits and CBT-I have the strongest evidence. Some people include tart cherry, chamomile or magnesium in a wind-down routine.
Is melatonin halal?
Prescribed melatonin is usually synthetic. As with any medicine, check the inactive ingredients with your pharmacist if gelatine or alcohol is a concern.
Sources: NHS: melatonin · NHS: insomnia · GB NHC register
This article is general information, not medical advice. If sleep problems last more than a few weeks or affect your daily life, speak to your GP. Food supplements should not replace a varied, balanced diet and healthy lifestyle.
