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Why is Mounjaro so expensive in the UK?

Who sets the price, why it jumped in 2025, why there is no cheap generic yet, and why the NHS is rolling it out slowly. Official figures only: no seller prices, no seller names.

GLP Guidebook teamPublished 14 Oct 20265 min read19 sourcesWritten from published sources
What we checked19 sources, each one opened and linked to the sentence it supportsLast checked 14 Oct 2026 · Next review due 14 Apr 2027 · How we write

Written for the UK.

The short answer

Eli Lilly sets Mounjaro’s UK list price: £133 to £330 for a 4-week pen, depending on dose, after a 2025 rise. No generic copy of tirzepatide is licensed in the UK yet. On the NHS you pay £9.90 an item in England or nothing elsewhere, but NHS access is being phased in, partly because of the cost.

Key takeaways

  • The October 2026 Drug Tariff lists a 4-week Mounjaro pen at £133 at 2.5 mg, rising to £330 at 12.5 and 15 mg, excluding VAT.1
  • Lilly raised its UK list price from 1 September 2025, saying the launch price had been set below the European average to avoid delaying NHS access.3
  • The government said private pricing “is a matter for Lilly and for private providers”, while the NHS pays a confidential discounted price.3,2
  • Generic liraglutide shows what copies can do: the Drug Tariff price is £50.49 for 2 pens, against £196.20 for 5 Saxenda pens.1,8
  • NICE estimates 3.4 million people in England are eligible for NHS Mounjaro, and expects at least 220,000 to be funded in the first 3 years.5
Before you go further
  • GLP‑1 medicines are prescription-only medicines in the UK, never sold over the counter.19
  • The prices below are official list prices and NHS charges. We don’t quote, rank or link to any seller.
  • A prescriber decides whether a medicine fits, which one and at what dose. Nothing here is a recommendation.
  • The risks are the same however you pay: see our side effects guide.
On this page
  1. What does Mounjaro cost at list price?
  2. Who sets the price of Mounjaro?
  3. Why did the price jump in 2025?
  4. Why is there no cheap generic Mounjaro?
  5. Why doesn’t the NHS give it to everyone who qualifies?
  6. Why does the price go up with the dose?
  7. Questions people ask
  8. How we researched this
  9. Sources

What does Mounjaro cost at list price?

A 4-week Mounjaro pen lists at £133 to £330 before VAT, so a year held at one dose costs £1,729 to £4,290.1

Each KwikPen holds 4 weekly doses, so a year is 13 pens.9 The Drug Tariff lists £133 at 2.5 mg, £180 at 5 mg, £255 at 7.5 and 10 mg, and £330 at 12.5 and 15 mg.1 The year totals are our arithmetic: pen price × 13.

On an NHS prescription you pay the charge, not the list price: £9.90 an item in England.12 Prescriptions are free in Scotland, Wales and Northern Ireland.13,14,15 Every strength is in How much is Mounjaro in the UK?

Who sets the price of Mounjaro?

Eli Lilly sets the list price; the NHS buys at a confidential discount, and each private service sets what it charges you.2,3

NICE publishes the list price “excluding VAT; company communication”, meaning Lilly supplied it.2 The NHS gets Mounjaro under a commercial arrangement, and the discount is confidential.2

When Lilly raised the price, the Department of Health said: “Pricing in the private market is a matter for Lilly and for private providers.”3 The GPhC, the pharmacy regulator, says access to weight-loss medicines “is usually via private services”.16

Why did the price jump in 2025?

Lilly raised its UK list price from 1 September 2025, from £92–£122 to £133–£330 a pen, citing price gaps with other rich countries.3

Lilly said the rise aimed to “address pricing inconsistencies compared to other developed countries, including in Europe”.3 It said the UK launch price had been “significantly below the European average to prevent delays in NHS availability”.3

The government said NHS commissioning “is unaffected by the change in list price”.3 Complaints followed: 78% of the pricing concerns the GPhC received came in August and September 2025.16 More in Why did Mounjaro’s price go up?

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Why is there no cheap generic Mounjaro?

No generic tirzepatide is licensed in the UK: the October 2026 Drug Tariff lists tirzepatide only as Mounjaro KwikPen pens.1

A generic is a copy of a medicine made by another company. Copies can enter the market once the original’s patents and related protection end.6 We found no published UK end date for tirzepatide’s protection. Liraglutide shows what copies can do to price.

Biocon launched generic liraglutide in the UK on 28 February 2025, as Liraglutide Biocon and Biolide.7 The October 2026 Drug Tariff price for generic liraglutide is £50.49 for 2 pens.1 Saxenda, the original weight brand, lists at £196.20 for 5.8 Per pen that is £25.25 against £39.24, by our arithmetic.

Semaglutide, in Wegovy and Ozempic, is still protected. UK patent attorneys expect Novo Nordisk’s exclusivity in Europe to end in 2031.6 See Generic liraglutide vs Saxenda.

Why doesn’t the NHS give it to everyone who qualifies?

Because of the cost and the services needed: NICE estimates 3.4 million people in England are eligible, so NHS England is phasing it in.5

NICE judges value using a QALY, a year of life in full health. It treated £20,000 per QALY gained as the acceptable limit for Mounjaro.4 It noted a “high decision risk given the potential population size”.4

NHS England asked for more time. Its costs would exceed NICE’s £20 million-a-year budget test in each of the first 3 years.5 It also cited too few GP-based weight services and staff.5

NICE accepted that rollout may take up to 12 years, while saying it could well be shorter. At least 220,000 people are to be funded in the first 3 years.5 Who comes first is in Mounjaro on the NHS.

Why does the price go up with the dose?

Each strength has its own pen and list price, so the cost climbs as the dose steps up, from £133 at 2.5 mg to £330 at 15 mg.1

The UK label starts at 2.5 mg for 4 weeks, then 5 mg. Rises after that are 2.5 mg at a time, at least 4 weeks apart.9 A year climbing to 15 mg comes to about £3,793 at list price.1

That is our arithmetic: £133 + £180 + £255 + £255 + £330, then 8 more pens at £330. A prescriber may stop at a lower dose, which costs less. Our cost calculator adds up any plan.

RisksThe risks, in brief
  • Stomach effects. In the SURMOUNT-1 and -2 weight trials pooled on the UK label, 25 to 29 in 100 people on 5 to 15 mg felt sick, against 9 in 100 on a dummy injection.9
  • Gallstones are common (1 in 10 to 1 in 100) and pancreatitis uncommon (1 in 100 to 1 in 1,000) on the UK Mounjaro label.9,11
  • The pill. Mounjaro can make it less reliable: the MHRA advises a barrier method for 4 weeks after starting and after each dose rise.10
  • Pregnancy and surgery. Stop Mounjaro at least 1 month before a planned pregnancy, and tell the team before any anaesthetic.10
Full detail in our side effects guide →
Get help now: call 999 or go to A&E for severe, persistent stomach pain that may spread to the back. It can be pancreatitis.11 Not sure? Use NHS 111.17 Northern Ireland has no 111: use your GP’s out-of-hours service.18

Questions people ask

Why is Mounjaro so expensive in the UK?

Lilly sets the list price, £133 to £330 a pen, and raised it in September 2025. No generic copy of tirzepatide is licensed in the UK yet.1,3

Is Mounjaro cheaper on the NHS?

For you, yes: £9.90 an item in England and free in Scotland, Wales and Northern Ireland. The NHS pays a confidential discounted price.12,13,14,15,2

Will Mounjaro get cheaper?

We found no announced price cut. Generic liraglutide shows copies can cost less, but semaglutide protection in Europe is expected to last until 2031.1,6,8

Why did Mounjaro go up in price?

Lilly said its UK launch price was well below the European average and it wanted to address price gaps with other developed countries.3

How much does a year of Mounjaro cost at list price?

Held at one dose, 13 pens cost £1,729 at 2.5 mg and £4,290 at 12.5 or 15 mg, excluding VAT, by our arithmetic.1

How we researched this

On 14 October 2026 we read the October 2026 Drug Tariff, NICE TA1026 (sections 2 to 4) and TA664, Lilly’s and the government’s statements as reported by The Pharmaceutical Journal, the GPhC’s April 2026 review, Biocon’s launch release and a patent attorneys’ note.

Year totals are our arithmetic from list prices. We show no seller’s price and name no seller.

Before you move on

  • Price the whole dose ladder, not the first pen.
  • Count 13 pens a year, not 12.
  • Check whether you could get it on the NHS where you live.
  • Note that no generic Mounjaro is licensed yet.
  • Budget for the dose you are likely to stay on.
Cost calculatorStopping and the long termConsidering it for my weightAll GLP-1 prices

More from the UK blog

UKUnited KingdomHow much do Mounjaro and Wegovy cost in the UK, on the NHS or privately?UKUnited KingdomCan I get Mounjaro on the NHS in 2026? The rules in England, Scotland, Wales and Northern IrelandUKUnited KingdomGeneric liraglutide vs Saxenda: is there a difference?
About GLP Guidebook

The monthly UK update

An independent guide to GLP‑1 medicines. We don’t sell medicines, take drug-company money, earn commissions or link to any provider. Once a month: NHS changes, approvals, list prices and safety alerts. How we write

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Sources

  1. NHS Business Services Authority. Drug Tariff, Part VIIIA, October 2026 (basic prices excluding VAT): tirzepatide pens £133.00 (2.5 mg), £180.00 (5 mg), £255.00 (7.5 and 10 mg), £330.00 (12.5 and 15 mg); semaglutide pens £73.25 to £175.80; liraglutide 6 mg/ml 3 ml pens £50.49 for 2. nhsbsa.nhs.uk
  2. NICE. Tirzepatide for managing overweight and obesity, TA1026, section 2: list prices for a 4-week supply, “excluding VAT; company communication” (2.3), and the confidential commercial arrangement (2.4). nice.org.uk
  3. The Pharmaceutical Journal. UK’s biggest online pharmacy freezes Mounjaro price amid reports of ‘stockpiling’. 18 August 2025 (Lilly and DHSC statements; previous prices £92 to £122). Trade press. pharmaceutical-journal.com
  4. NICE. TA1026, section 3: committee discussion, 3.24 (acceptable ICER of £20,000 per QALY gained; decision risk given the eligible population size). nice.org.uk
  5. NICE. TA1026, section 4: implementation (NHS England funding variation request; budget impact over £20 million in each of the first 3 years; 3.4 million people eligible; at least 220,000 to be funded in the first 3 years). nice.org.uk
  6. Reddie & Grose LLP (patent attorneys). Changes in the Ozempic patent landscape. 9 February 2026 (“Novo Nordisk’s loss of exclusivity in Europe is expected in 2031”). Secondary source. reddie.co.uk
  7. Biocon Limited. Biocon Limited launches its GLP-1, liraglutide, in the United Kingdom. Press release, 28 February 2025 (Liraglutide Biocon and Biolide). biocon.com (PDF)
  8. NICE. Liraglutide for managing overweight and obesity, TA664, section 2.3: list price of Saxenda £196.20 for 5 × 18 mg pens, excluding VAT (2020). nice.org.uk
  9. Eli Lilly. Mounjaro KwikPen: UK summary of product characteristics (SmPC), electronic Medicines Compendium. Date of revision 29 August 2026. Sections 4.2, 4.4, 4.8 and 6.5. UK label. medicines.org.uk (emc)
  10. MHRA. GLP-1 medicines for weight loss and diabetes: what you need to know. Guidance, updated 5 February 2026. gov.uk
  11. MHRA. MHRA updates guidance for GLP-1 prescribers and patients (acute pancreatitis). Press release, 29 January 2026. gov.uk
  12. NHS Business Services Authority. NHS prescription prepayment certificate (PPC): “The prescription charge in England is £9.90.” nhsbsa.nhs.uk
  13. Citizens Advice Scotland. Help with health costs: “Prescriptions in Scotland are free.” citizensadvice.org.uk
  14. Welsh Government. Free prescriptions. gov.wales
  15. nidirect (Northern Ireland). Help with health costs: “All prescriptions dispensed in Northern Ireland are free of charge for everyone.” nidirect.gov.uk
  16. General Pharmaceutical Council. Weight management medicines and services: a review of GPhC inspections and concerns. April 2026. pharmacyregulation.org (PDF)
  17. NHS. When to call 999, and NHS 111 if you’re not sure. nhs.uk
  18. nidirect (Northern Ireland). GP out of hours service. nidirect.gov.uk
  19. MHRA. First GLP-1 tablet for weight loss approved in the UK. Press release, 11 June 2026 (“As with all GLP-1 receptor agonists, this is a prescription-only medication”). gov.uk

Last checked 14 Oct 2026 · Next review due 14 Apr 2027 · Report an error

How this page was made. Written by the GLP Guidebook team from the sources above. It’s general information, not medical advice. Talk to your GP, pharmacist or prescriber before starting, stopping or changing any medicine. We don’t sell, prescribe or recommend any brand or provider. How we write