Mounjaro Price Comparison UK: What You're Actually Paying For

Why the price range is so wide, and what it usually hides

The gap between the cheapest and most expensive Mounjaro listings in the UK has grown considerably since September 2025. As widely reported at the time, Eli Lilly revised its UK list prices significantly upward; the highest dose moved from around £122 to roughly £330 per four-week pen at list. Private providers set their own retail prices on top, which is why you'll see figures anywhere from £149 to well over £300 depending on which dose and which clinic or pharmacy you're looking at.

What those numbers often don't include: a separate consultation fee (sometimes charged each time, sometimes annually), a prescription charge, delivery costs, and any kind of clinical follow-up if something goes wrong or you want to change dose. Some services bundle all of this; many don't. A headline price that looks lower can end up costing more once those extras are applied. When you're doing a Mounjaro UK price comparison, it's worth building the full picture rather than comparing the front-page number alone. Our detailed breakdown of what shapes the Mounjaro price in the UK covers this in more depth.

The dose you're on matters too. The 2.5mg starting dose costs less than the 7.5mg or 10mg pens that most people eventually move to. If a comparison is quoting the starter price but you'll be on a higher dose within a few months, the real monthly cost will look different. Our 5mg price comparison, our 10mg price comparison for those further into their dose schedule, and the equivalent pages for other doses break these figures down by strength.

What a legitimate price for a prescription medicine should cover

Mounjaro is a prescription-only medicine. That's not a technicality, it means a qualified prescriber has to assess your health, your medical history and your other medications before any pen is dispensed. That clinical assessment has a cost, and if it isn't visible in the price you're being quoted, it's either bundled invisibly or it isn't happening at all. Neither situation is neutral.

A properly structured private service covers: the clinical consultation (which for a GLP-1 medicine like Mounjaro should include identity checks and weight verification, not just a tick-box questionnaire), the prescription itself, the medicine through a verified supply chain, and some form of ongoing clinical contact. If the price doesn't account for those things, ask why. A prescriber also needs to review each repeat order, a detail that matters more than it sounds, because your dose, your health and your circumstances can all change.

At nume, one price covers all of it. Consultation, prescription, treatment, delivery and 7-day aftercare, no itemised surprises. We're transparent that we're not positioned as the cheapest option in the market; what that buys you is a service where nothing has been stripped out to hit a number. You can read more about who we are and how our pharmacy is regulated, or check our GPhC registration directly at the pharmacy register.

The question that should sit above price: is it genuine?

This is the part of the Mounjaro price comparison that most comparison tools skip. The MHRA has issued repeated warnings about counterfeit weight-loss pens sold online, including the first UK seizure of an illicit manufacturing site producing fake tirzepatide pens in Northampton in October 2025. Fake pens have been found to contain the wrong substances entirely, including insulin. The enforcement operation that year removed roughly 20 million doses of illegally traded weight-loss medicines, worth an estimated £45 million. That figure is not abstract.

The practical signs of a suspect seller: Mounjaro offered without a clinical assessment, prices significantly below anything in the legitimate market, sellers operating through social media or unofficial websites, and an inability to verify the pharmacy on the GPhC pharmacy register. Any legitimate UK pharmacy dispensing prescription medicines will appear there. If a price looks impossible relative to Eli Lilly's own list price, there's a reason for that. The MHRA guidance on GLP-1 medicines spells this out clearly, you can read their public advice on the Yellow Card website, where you can also report suspect sellers.

For a prescription medicine, price is the wrong primary filter. The right questions are: is this pharmacy GPhC-registered, is there a real prescriber reviewing my case, and is the medicine coming through the licensed supply chain? Those answers determine whether treatment is safe, not whether you saved £20 on the pen.

How nume fits into the comparison, plainly put

We don't run discount codes, price-match deals or promotional offers. The price you see on our treatment page is the whole price. That's a deliberate choice, not an oversight. A Mounjaro pen arrives with DPD the next working day if your order is placed before 12pm and clinically approved, tracked to your door in plain packaging with nothing on the outside to indicate what's inside. The pen itself is Eli Lilly's KwikPen, sourced through the licensed UK supply chain, dispensed from our own GPhC-registered pharmacy.

Every repeat order is clinically reviewed by a prescriber before it's approved, which means you're not just renewing a subscription on autopilot. If your situation has changed, the prescriber knows. If a dose increase is appropriate, there's a process for that too, not an automatic system. Our clinical team oversees every case.

If you're weighing up where to start, the most useful step is a free consultation rather than a comparison spreadsheet. Eligibility isn't just about BMI, the prescriber looks at the whole picture. You can explore what the Mounjaro treatment involves, including how the dose schedule works and what the clinical evidence shows, or go straight to checking your eligibility. The Eli Lilly price increase explained page also gives more context on why UK prices shifted so sharply in late 2025, and if you're approaching the higher end of the dose schedule, our 15mg price comparison covers what to expect at that stage.