Is Melatonin legal in Ireland?

Formal status

There is no EU-harmonised rule for melatonin in food supplements. The question is governed nationally, and member state positions range from a prescription-only classification to caps of several milligrams.

Ireland sits at the strictest end: melatonin is a prescription-only medicine at any strength. The Medicinal Products (Prescription and Control of Supply) Regulations 2003 (S.I. No. 540/2003) list melatonin in column 1 of the First Schedule with A in column 2 and no entry in columns 3, 4 or 5 - and the exemption in regulation 5(2), which allows supply without prescription up to a stated maximum strength, pack size, form or dose, is available only where such an entry exists. There is none, so the classification is dose-independent. Part A means the prescription cannot be renewed. The Minister for Health confirmed this in a Dáil written answer of 29 July 2025, adding that no application to reclassify melatonin has been made, and the Food Safety Authority of Ireland states that melatonin is not permitted in food supplements available on the Irish market.

Regulation 19(1) of the same instrument separately provides that a person shall not supply by mail order any medicinal product, and its definitions extend that to distance supply solicited by a person in the chain of supply whether inside or outside the State.

Do we sell here?

Not at the moment.

Ireland classifies melatonin as a prescription-only medicine at every strength, with no food supplement route at any dose - one of the strictest positions in Europe.

That said, melatonin is not the reason we do not ship to Ireland. See our CBN page for Ireland for the fuller country picture.

Outlook

The Irish classification has been stable for over twenty years, and the Minister confirmed in July 2025 that no application to change it has been made.

What is moving is enforcement rather than the rule. The food safety authority has twice in the last year ordered melatonin supplements off the Irish market, and the revenue authorities have a stated route for detaining medicinal products arriving by post and referring them to the medicines regulator. This is worth watching closely even though it is not currently what determines our position on Ireland.

Timeline

November 2003

Medicinal Products (Prescription and Control of Supply) Regulations 2003 list melatonin in Part A of the First Schedule with no maximum-strength entry, making it prescription-only at any dose, and prohibit mail-order supply of medicinal products by regulation 19(1)

Irish Statute Book, S.I. No. 540/2003

April 2025

Minister for Finance confirms in a Dáil written answer that Revenue detained a consumer's melatonin purchased in another member state and referred it to the HPRA, and that medicinal products bought online and imported into the State breach regulation 19(1)

Houses of the Oireachtas, PQ 343 [16666/25]

October 2025

FSAI alert 2025.53 requires retailers and online sellers to remove five Life Extension melatonin supplements, including a 1 mg capsule product, from sale

Food Safety Authority of Ireland, alert 2025.53