Can a UK online pharmacy fill an Irish prescription? What the rules say, both ways

If you live in Ireland, you've probably noticed how many UK websites talk about Mounjaro and Wegovy. Same brand names, same doses, an hour's flight away. So it's a fair question: if you already have an Irish prescription, could a UK online pharmacy fill it and post it over?

The short version is no. I'd rather you heard that here than after paying for a parcel that never arrives. The rules work against it in both directions, and once you see why, the options that are open to you in Ireland are much clearer.

The short answer

An Irish prescription in a UK pharmacy

This part is a yes, with conditions. Since 1 January 2021, a pharmacist anywhere in the UK can dispense a prescription written by an approved prescriber in the EEA or Switzerland, and the Republic of Ireland is on the UK government's list. The guidance says the prescription should show the prescriber's name, their professional qualifications, their work address, an email address and a phone number with the international code, and the country it was written in.

There are limits. UK pharmacists can't dispense controlled drugs in Schedules 1 to 3 this way, or unlicensed "specials", and licensed GLP-1 medicines are neither. They can also refuse if they doubt the prescription is genuine or have concerns about whether the medicine is right for you.

That rule is there for people who are in the UK when they need their medicine, on holiday or for work, say. It isn't a way to have medicine sent to Ireland, which is the next part.

It may not stay exactly as it is, either. In 2025 the UK government asked for evidence on private prescribing, including concerns about online prescribers based in the EEA. The call closed on 4 November 2025, and no response had been published when I checked.

Why a UK pharmacy can't post it to you

Irish law has banned mail-order supply of medicines since 2003. Regulation 19 of the Medicinal Products (Prescription and Control of Supply) Regulations says, simply, "A person shall not supply by mail order any medicinal product." Medicines you can buy without a prescription were taken out of the ban in 2005, and in 2015 it was extended to cover selling prescription medicines online.

The ban isn't limited to Irish sellers. The definition of mail order covers the chain of supply "whether inside or outside of the State". The HPRA, which regulates medicines in Ireland, puts it plainly: "In Ireland, it is against the law to supply prescription medicines online."

The UK side lines up with that. The General Pharmaceutical Council, which regulates UK pharmacies, says that "if medicines are sold or supplied to people who are outside the UK, the laws that apply in the countries the medicines are being sent to must be followed." So a UK pharmacy posting a prescription medicine to an Irish address isn't a legal route, whoever wrote the prescription.

What happens to parcels

The HPRA says prescription medicines found coming into the country illegally are detained by customs officials and may be destroyed. Once that happens, that's the end of it: "If your medicine has been detained, we cannot send it to you or return it to the supplier. It is an illegal product and it may be destroyed."

GLP-1 products are now a big part of what it finds. The HPRA detained 48,752 GLP-1 units in 2025, up from 1,582 in 2024. Most were drops and microneedle patches promoted as containing semaglutide or tirzepatide, and when it tested a sample of the patches, they didn't contain semaglutide. It has also started a prosecution over the manufacture and distribution of GLP-1 medicines.

That testing result is the line I'd remember from this page. Some of what's being sold into Ireland online isn't the medicine it claims to be.

A UK prescription in an Irish pharmacy

The other direction has its own rule. Since 1 January 2021, Irish pharmacies can dispense prescriptions from UK doctors, dentists and nurse prescribers, as long as the prescription "has not been issued with a view to enabling the supply of a medicine by mail order and the prescription has not been issued by means of information society services". That last phrase means online.

The Pharmaceutical Society of Ireland, which regulates pharmacies here, spells out what that means: "In practice this means that cross-border telemedicine services are prohibited by law. For example, a prescription that comes from an online doctor service where the prescriber is based in the UK will no longer be valid for dispensing in a pharmacy registered in Ireland."

A UK prescription from an appointment in person can still be valid, but only the original paper one. The PSI says a fax or scanned copy "is not a legally valid prescription", and the medicine has to be licensed in Ireland.

What you can do in Ireland

None of this means the medicines aren't available here. They are, through the ordinary route.

• Start with your GP, or another prescriber registered in Ireland. They can tell you whether a weight-loss medicine is right for you at all, which one, and whether you meet the criteria.
• Your prescription goes to an Irish pharmacy. It can be on paper, or your GP can send it through Healthmail, the HSE's system for sending prescriptions electronically.
• Ask your pharmacist anything about how the medicine is supplied, stored or taken. That's their job, and they know the Irish rules.
• Keep your receipts. Revenue's health expenses relief covers "drugs and medicines" prescribed by a practitioner, where nobody else pays for them. Its guidance doesn't mention weight-loss medicines by name, so check with Revenue before you claim.

What the HSE pays for

This is the part most people are really asking about, because private prescriptions here aren't cheap. As of 21 October 2026:

• Saxenda is the only GLP-1 the HSE pays towards for weight loss, under strict criteria.
• Wegovy: on 13 October 2026, the National Centre for Pharmacoeconomics (NCPE) recommended that it "be considered for reimbursement". The HSE makes the decision, and hasn't yet.
• Mounjaro: the NCPE said in December 2025 that it could be considered "if cost-effectiveness can be improved relative to existing treatments". The Irish Times reported on 15 October 2026 that the HSE drugs group had discussed it but hadn't made a recommendation.

So for now, Wegovy and Mounjaro for weight loss are paid for privately. Our Irish GLP-1 prices and access page has the details and the documents behind them, and our Wegovy pill explainer covers where the tablet stands in Ireland.

Questions people ask