How much is Mounjaro in the UK?
The UK list price of a Mounjaro (tirzepatide) KwikPen is £133 to £330 before VAT, depending on strength. Each pen holds 4 weekly doses, and these prices date from 1 September 2025. On an NHS prescription you pay £9.90 an item in England, or nothing in Scotland, Wales and Northern Ireland. Private services set their own prices.
- Mounjaro, like every GLP‑1 medicine, is a prescription-only medicine in the UK. A healthcare professional must assess you before it can be prescribed.1
- Prices here are list prices from official sources, before VAT. We never quote a seller's price, and we don't name or rank sellers.
- To spot fake pens and illegal sellers, see Is it safe to buy Mounjaro online in the UK? The risks are in Guide 5: Side effects and risks.
- Nothing here promises any result, and nothing here is for sale.
What is the list price of each Mounjaro strength?
Lilly's list price, before VAT, rises with the strength, from £133 for a 2.5 mg pen to £330 for 12.5 and 15 mg.2
| Strength | List price per pen (4 doses) | Per weekly dose | 52 weeks (13 pens) |
|---|---|---|---|
| 2.5 mg | £133 | £33.25 | £1,729 |
| 5 mg | £180 | £45 | £2,340 |
| 7.5 mg | £255 | £63.75 | £3,315 |
| 10 mg | £255 | £63.75 | £3,315 |
| 12.5 mg | £330 | £82.50 | £4,290 |
| 15 mg | £330 | £82.50 | £4,290 |
List prices excluding VAT, from NICE TA1026, in force since 1 September 2025, checked 12 Oct 2026.2,9 The last two columns are our arithmetic: pen ÷ 4, and pen × 13.
The NHS pays a lower price agreed with Lilly, and the details are confidential.2 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, up to 15 mg.3 So 1 pen at 2.5 mg, then 12 at 5 mg, comes to £2,293 a year at list price, by our arithmetic.
Medicine and prescription charges, in £. Free, no sign-up.
What do you pay for Mounjaro on the NHS?
On an NHS prescription you pay the prescription charge, not the list price: £9.90 an item in England and nothing in the other 3 nations.
In England, a prepayment certificate (PPC) covers all your NHS prescriptions for £32.05 for 3 months or £114.50 for 12 months.4 If each 4-week pen is one item, a year is 13 items, or £128.70. That is our arithmetic.
People in England whose diabetes is treated with medicine, not diet alone, can get a medical exemption certificate for free prescriptions.5 Prescriptions are free in Scotland, Wales and Northern Ireland.6,7,8 Who can get it is in Can I get Mounjaro on the NHS?
What about private prescriptions?
A private prescription is paid in full, and the government says private pricing "is a matter for Lilly and for private providers".9
That was the Department of Health and Social Care's comment on the September 2025 rise.9 Prices therefore vary between services. We don't list sellers' prices. The reasons for the rise are in Why did Mounjaro's price go up? The fuller cost picture is in How much Mounjaro and Wegovy cost in the UK.
In Northern Ireland, a leaflet notes that GPs cannot take over private prescribing on the Health Service.10 How to see a prescriber is in Guide 6.
- Stomach effects are very common. In the weight trials on the UK Mounjaro label, 25 to 29 in 100 people on 5 mg to 15 mg felt sick (nausea), against 9 in 100 on a dummy injection.3
- Gallstones are common (1 in 10 to 1 in 100) in the weight trials, and a swollen pancreas (acute pancreatitis) is uncommon (1 in 100 to 1 in 1,000), on the UK Mounjaro label. The MHRA strengthened the pancreatitis warning in January 2026.3,11
- Pregnancy and the pill. The MHRA says to stop Mounjaro at least 1 month before trying for a baby. It can make the contraceptive pill less reliable for 4 weeks after starting and after each dose rise.1
- Operations. Tell your anaesthetist you take it, because it slows how fast your stomach empties.1
Read the full picture
Related questions
Sources
- MHRA. GLP-1 medicines for weight loss and diabetes: what you need to know. Guidance, published 5 Jun 2025, last updated 5 Feb 2026. gov.uk
- NICE. TA1026, section 2: marketing authorisation (2.1); list prices "excluding VAT; company communication" for a 4-week supply: £133.00 (2.5 mg), £180.00 (5 mg), £255.00 (7.5 and 10 mg), £330.00 (12.5 and 15 mg) (2.3); confidential commercial arrangement (2.4). Price list updated 1 Sep 2025. nice.org.uk
- Eli Lilly. Mounjaro KwikPen summary of product characteristics (UK SmPC), date of revision 29 Aug 2026, sections 4.1, 4.2, 4.4, 4.5, 4.6 and 4.8 (Table 1). UK label. medicines.org.uk (emc)
- NHS Business Services Authority. NHS Prescription Prepayment Certificate (PPC): "The prescription charge in England is £9.90"; PPC £32.05 for 3 months, £114.50 for 12 months. nhsbsa.nhs.uk
- NHS Business Services Authority. Medical exemption certificates: covers "diabetes mellitus, except where treatment is by diet alone". nhsbsa.nhs.uk
- NHS inform (Scotland). Prescription charges and exemptions: "Prescriptions in Scotland are free"; English prescription forms are charged "at the current English rate of £9.90 per item". nhsinform.scot
- Welsh Government. Free prescriptions: "If you are registered with a GP in Wales you are entitled to free prescriptions from a pharmacist in Wales". gov.wales
- nidirect (Northern Ireland). Help with health costs: "All prescriptions dispensed in Northern Ireland are free of charge for everyone". nidirect.gov.uk
- The Pharmaceutical Journal. UK's biggest online pharmacy freezes Mounjaro price amid reports of 'stockpiling', 18 Aug 2025 (Lilly and DHSC statements; list prices from 1 Sep 2025; previous prices "£92 to £122"; primary-care prescribing from 23 Jun 2025). Trade press. pharmaceutical-journal.com
- Northern Ireland Formulary (HSC). Patient information leaflet: Tirzepatide (Mounjaro) for obesity, April 2025: "not currently available through the Health Service in Northern Ireland for the treatment of obesity"; Wegovy and Saxenda "not yet available" because NI "does NOT currently have such a specialist weight management service"; "GPs cannot take over prescribing on the Health Service". niformulary.hscni.net (PDF)
- MHRA. MHRA updates guidance for GLP-1 prescribers and patients (acute pancreatitis). Press release, 29 Jan 2026. gov.uk
Last checked 12 Oct 2026 · Next review due 12 Apr 2027 · Report an error
How this answer was made. Written by the GLP Guidebook team from the sources above, all checked on 12 Oct 2026. Prices are official list prices or NHS charges, never a seller's price, and we don't name or rank sellers. Figures marked as our arithmetic are worked out from those sources. It's general information, not medical advice. Talk to a GP, pharmacist or other qualified prescriber before starting, stopping or changing any medicine. How we write