How Much Does 5mg Mounjaro Cost in the UK?

Why does the 5mg Mounjaro price vary so much between providers?

It is a question our prescribers hear most weeks, usually from patients who have spotted a wide range of figures online and are trying to work out which one to trust. The short answer is that 5mg Mounjaro prices vary because providers structure their services differently, and because the medicine's UK list price changed meaningfully in late 2025.

Eli Lilly raised its UK list prices from 1 September 2025. The top-dose pen moved from around £122 to around £330 per four-week pen, and that movement affected market rates at lower strengths too. Reported private market prices since then range roughly £149 to £375 per month across all doses and providers, and if you want a clearer picture of how much the Mounjaro jab costs across the board, we have put that together in one place. The 5mg pen sits in the lower half of that band, but "lower" is relative. For context on how pricing scales across doses, see how Mounjaro pricing changes at higher strengths.

Beyond the list-price shift, structural differences between providers matter just as much. Some clinics charge separately for consultations, prescriptions, and aftercare, all billed individually. Others bundle everything into a single monthly figure. Neither approach is inherently wrong, but comparing headline pen prices without knowing what each covers is like comparing flights that do and don't include luggage. The NICE appraisal of tirzepatide (NICE TA1026) establishes this as a clinically significant intervention requiring prescriber oversight; any pricing that sidesteps that oversight is a warning sign, not a bargain.

What does the headline 5mg price often leave out?

Plenty. The single-pen figure you see quoted on a search results page commonly excludes one or more of the following: the initial clinical consultation, an ongoing prescription review fee charged at each repeat, delivery costs (which can reach £10–£15 per order for temperature-controlled despatch), and any access to clinical support between doses. Some providers also charge separately for a prescriber review if you want to increase your dose, or add an administration fee for transferring your care record from another clinic.

For anyone working out a realistic monthly spend, the total monthly cost of Mounjaro page pulls these components together more clearly. The NHS medicines page for tirzepatide on the NHS website also explains what clinical monitoring is standard for this medicine, useful benchmarking for what a responsible private service should include as standard rather than as an extra.

One practical point: Mounjaro is supplied as a pre-filled KwikPen delivering four weekly doses. A "5mg pen" means four injections of 5mg, covering roughly one month. If a price quotes per-injection rather than per-pen, the monthly cost is four times the figure shown. Worth checking before you commit.

Where does nume sit on price, and why is that a deliberate choice?

Plainly: we are not trying to win a price comparison. That is a considered position, not an oversight. The treatment price at nume covers the consultation, the prescription, the medicine itself, next-working-day tracked DPD delivery, and seven-day aftercare, one figure, nothing added at checkout. You can review exactly what is included and see current treatment pricing on the treatment page.

What sits behind that price matters more than the number itself. Every consultation is personally read by a GPhC-registered Independent Prescriber on the day it arrives, a real clinician, not a screening algorithm. Identity is verified by photo ID, weight is confirmed on video, and GP notification follows in line with GPhC guidance. For repeat orders and dose increases, clinical review happens again before anything is dispensed. You can confirm our pharmacy registration (GPhC premises number 9012878) at the GPhC register. More on how the service is structured is on the about us page.

There is no subscription. No auto-renewal. No hidden fee that appears after you have handed over your card details. For a broader view of how private tirzepatide costs compare with alternatives, including how much Mounjaro costs on the NHS for those who may qualify, this overview of GLP-1 tirzepatide costs is worth reading.

Is the cheapest 5mg Mounjaro listing actually the best deal?

For most consumer purchases, cheapest and best-value track closely. For a prescription-only medicine supplied by an online pharmacy, they can pull in opposite directions. The MHRA has warned publicly and repeatedly about counterfeit GLP-1 pens sold through social media and unverified online sellers, in October 2025 the first UK site manufacturing fake tirzepatide pens was raided. Fake pens have been found to contain entirely different substances, including insulin. The right question is not which listing shows the lowest number, but which provider you can verify as legitimate, regulated, and running genuine supply-chain sourcing.

Three things to check before buying from any online pharmacy: confirm the GPhC registration number on the pharmacy register, confirm that a prescriber (not a questionnaire alone) is involved in approving your treatment, and confirm that the medicine comes through the licensed UK supply chain. A seller offering Mounjaro at a price significantly below the market range, or through channels that do not involve a prescriber assessment, warrants real caution. You can report suspect sellers at the MHRA Yellow Card service. For a fuller look at what legitimate private access involves, the Mounjaro overview page covers the clinical and regulatory picture.