How much melatonin can I bring to United Kingdom?

Up to 3 months' personal supply recommended. Source: His Majesty's Revenue and Customs (HMRC).

What documentation do I need for melatonin in United Kingdom?

Doctor's letter or home country prescription recommended.

ITEM RULE · TRAVELING

RESTRICTED

Melatonin 🇬🇧 United Kingdom

RESTRICTEDVERIFIED · 2025-11-01NOT YET GRADED

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Prescription-only medicine in the UK. Personal import for own use is permitted but regulated.

ANSWER

Can I bring Melatonin into United Kingdom?

RESTRICTEDVERIFIED · 2025-11-01

Prescription-only medicine in the UK. Personal import for own use is permitted but regulated.

QUANTITY / LIMITS

Up to 3 months' personal supply recommended

DOCUMENTS

Doctor's letter or home country prescription recommended

DECLARATION

Required at the destination customs authority

SOURCE

gov.uk

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Full details

Melatonin is classified as a prescription-only medicine (POM) in the United Kingdom under the Human Medicines Regulations 2012. It cannot be bought over the counter in UK pharmacies. However, travellers may import melatonin for their personal use without a UK prescription provided the quantity is reasonable for personal use (typically up to 3 months' supply) and is for their own consumption. Melatonin purchased legally abroad and brought for personal travel use is unlikely to be confiscated, but carrying it without a prescription does technically contravene UK law if for domestic use. It is advisable to carry a doctor's letter.

PRACTICAL ADVICE

Carry melatonin in original packaging with a doctor's letter. MHRA enforcement against personal quantities is rare, but the prescription-only classification means caution is warranted.

OFFICIAL SOURCES · VERIFIED 2025-11-01

gov.uk mhra.gov.uk

RULE DETAILS

QUANTITY LIMITS

Up to 3 months' personal supply recommended

DOCUMENTATION REQUIRED

Doctor's letter or home country prescription recommended

LEGAL REFERENCE

Human Medicines Regulations 2012 (SI 2012/1916)

CUSTOMS AUTHORITY

His Majesty's Revenue and Customs (HMRC)

SHOW AT CUSTOMS

Printable customs card →

AIR TRAVEL IS SEPARATE

This page covers destination customs rules in United Kingdom. Whether you can carry melatonin through security, in carry-on, or in checked baggage depends on airline and screening rules — see air travel rules.