How much tirzepatide per week does UK private treatment actually cost?

The biggest misconception: one pen equals one injection

A lot of people searching for a weekly tirzepatide cost assume they're looking for the price of a single injection. That's an understandable reading of the phrase, but it leads to confusion when comparing providers. Each Mounjaro KwikPen contains four doses (one per week) so the correct unit for comparing UK private prices is the per-pen (per-month) cost, not a per-injection figure. If you want to understand how much Mounjaro you take per week and how that translates into a monthly pen, that page explains the dosing structure clearly. If a provider quotes what looks like a dramatically low weekly number, it's worth working out whether that's the pen divided by four, or something else entirely.

The dose also moves over time. Treatment starts at 2.5mg (a tolerability period designed to let your system adjust, not the dose where the main results happen) and is typically increased every four weeks by your prescriber, working through 5mg, 7.5mg, 10mg, 12.5mg and up to 15mg. Because higher doses carry a higher list price, the monthly cost of tirzepatide at 15mg is materially different from the cost at 2.5mg. Any price comparison that quotes a single headline figure without specifying the dose is giving you an incomplete picture, and understanding how much tirzepatide costs across those dose steps gives a more complete picture than any single headline figure. The full tirzepatide price breakdown by dose covers this in more detail.

Reported market prices since Eli Lilly's September 2025 list-price increase range from around £149 to around £375 per pen per month, varying by dose and provider. The highest dose's list price rose to around £330 for a four-week pen, according to widely reported figures at the time. These are the only per-pen figures cited here, hedged because private pharmacy prices vary above and below list.

What headline prices typically leave out of the weekly figure

The number quoted on a provider's homepage is rarely the number that reaches your bank account. Consultation fees are common: some clinics charge £30–£80 for an initial assessment, billed separately before any medicine is prescribed. Prescription fees add another layer. Delivery costs are charged by some providers per order. And ongoing clinical support (the kind of aftercare that matters when side effects land or your dose needs reviewing) is often an optional extra or simply absent.

This matters more for tirzepatide than for many other medicines because the titration schedule runs for months. You'll interact with your prescriber several times before reaching a maintenance dose, and each of those interactions should involve real clinical review of how your body is responding. If that review isn't included in the price, you're either paying for it separately or going without it. Our frequently asked questions set out exactly what each step of the process involves.

There is also the question of what happens when something goes wrong. Nausea and gastrointestinal discomfort are common, particularly in the first weeks or after a dose increase, and knowing there's a clinical team you can reach on a Saturday matters. Support that isn't built into the price tends not to be there when you need it.

Why you won't find a discount code for Mounjaro at nume

If you've arrived here looking for a promotional code, a voucher, or a sale price, the honest answer is that none of those exist at nume, and that's deliberate. Mounjaro is a prescription-only medicine regulated under UK law. Discount codes tied to a POM raise immediate questions about what is being discounted: the clinical review, the supply chain checks, the aftercare, or the medicine itself. Our position is that none of those things should be negotiated down.

What we offer instead is a single transparent price that covers the consultation, the prescription, the medicine, next-working-day DPD delivery, and access to our clinical team seven days a week. There are no hidden fees surfaced at checkout and no subscription that auto-renews without a fresh clinical review. You can see a full breakdown of Mounjaro price by dose and what it includes on our dedicated pricing page, or view current treatment options on the weight loss treatments page.

A note on unverified sellers: discount codes circulating on social media for GLP-1 medicines are a recognised red flag. The MHRA has warned publicly that counterfeit tirzepatide pens have entered the UK market through unregulated channels. If you're concerned about whether a dose or quantity being offered seems unusual, it's worth reading about how much tirzepatide is too much before making any decisions. Any seller offering these medicines without requiring a prescription, or at prices far below the reported market range, warrants serious scrutiny, you can report suspect sellers at the MHRA Yellow Card scheme.

For a prescription medicine, cheapest answers the wrong question

The metric that matters for tirzepatide isn't which provider offers the lowest number. It's whether the supply chain is legitimate, whether a real prescriber has reviewed your case, and whether clinical support is available when you need it. Our prescribers at the nume clinical team review every consultation personally on the same day it arrives, not software, not a waiting list for a callback. Identity is verified, weight is confirmed on video, and your GP is notified in line with GPhC guidance.

We don't lead on price because we're not trying to win that comparison. The all-in figure we charge is what genuine, clinically supervised treatment through a GPhC-registered pharmacy costs when nothing is cut. If you order before noon on a working day, your pen leaves our pharmacy the same day and arrives with you the next. It sits in the fridge door that evening, ready for your first dose that week. That's the full transaction, with nothing billed afterwards.

NICE's appraisal of tirzepatide (TA1026, published December 2024) sets out the clinical evidence base for this medicine, including the trial results that inform both prescribing decisions and public awareness. Reading it alongside the NHS tirzepatide patient information gives a clear picture of what the evidence actually says. What clinical trials show about how much weight loss tirzepatide produces per week on average is a separate question from cost, and worth reading in full.