Tirzepatide injection price: what UK private treatment actually costs

The myth: the cheapest listing is a fair price comparison

A question our prescribers hear most weeks is some version of: "I've seen tirzepatide for £X online, why is yours different?" It's a fair question. The problem is that advertised prices for Mounjaro tirzepatide injections rarely reflect the full cost of getting the medicine safely into your hands.

The misconception is that pen prices are like-for-like. They're not. A £149 headline price might cover the pen alone, with consultation fees, prescription charges and delivery stacked on top. A £320 headline from another provider might include all of those. You genuinely cannot compare two numbers without knowing what each one contains. And because tirzepatide is a prescription-only medicine, any legitimate route to it requires a clinical assessment, meaning that assessment cost is always somewhere in the chain, whether it's visible or not.

Eli Lilly's revised UK list pricing, which took effect in September 2025, pushed the highest-dose pen's list price from around £122 to around £330. That shift has rippled through the private market and is widely reflected in current provider pricing. If you want a clear picture of what tirzepatide injections cost across doses and providers, reported private prices since then range roughly £149 to £375 per month depending on dose and provider, though individual figures vary and are worth verifying directly. You can read more on the Mounjaro price overview page, which covers the full dose range in context.

What a legitimate tirzepatide price should always include

There is no standard structure across online providers, which is part of what makes comparison so difficult. At minimum, a transparent price for a prescription medicine ought to cover the clinical consultation, the prescription itself, the medicine, and delivery. In practice, many providers separate these out. Some charge a monthly subscription for access to a prescriber. Some bill for dose changes or add-on aftercare. A few charge for the consultation upfront, even if you're not approved.

Delivery costs add up quietly. Some providers charge £5 to £15 per order; others include it. If you're ordering monthly, that's £60 to £180 a year in delivery alone, not trivial when stacked against the medicine cost.

At nume, one price covers everything: consultation, prescription, the medicine, free next-working-day tracked delivery, and clinical re-review before every repeat order. There is no subscription and no auto-renewal. We're not the cheapest option and we don't try to be, the price reflects a proper clinical service, not a fulfilment operation. You can see exactly what's included on the weight-loss treatments page.

For a breakdown of how the 5mg dose specifically is priced across the market, the 5mg Mounjaro price guide has context on that tier.

Safety is the metric that matters more than price

Tirzepatide injections are a Black Triangle medicine under additional MHRA monitoring, and they require titration from a low starting dose under prescriber supervision. The MHRA has been clear, in its public guidance on GLP-1 medicines for weight loss, that these are not medicines to obtain casually or cheaply. Counterfeit pens (some containing insulin rather than tirzepatide) have been seized by the MHRA in significant volume, with enforcement escalating through 2025 to include the first UK illicit manufacturing site for fake tirzepatide pens.

Sellers offering these medicines without a proper prescription, via social media or at prices well below the market range, are a serious red flag. Any pharmacy supplying prescription medicines to UK patients must be registered with the GPhC; you can verify nume's registration directly on the GPhC register. The MHRA's Yellow Card scheme also allows anyone to report a suspect seller at yellowcard.mhra.gov.uk.

Price is the wrong test for a prescription medicine. The right questions are whether your prescriber has seen your full health picture, whether your medicine has come through the licensed UK supply chain, and whether someone qualified is available if something goes wrong. For more on how to judge a legitimate provider, the Mounjaro information page covers what to look for. If you're thinking about cost in relation to what the different doses might mean for you, our tirzepatide pricing guide puts the dose ladder in plain language, and our guidance on how much tirzepatide to inject at each stage explains how dosing and cost relate as you titrate up.

Ready to find out whether tirzepatide is clinically suitable for you? Start your free consultation and a GPhC-registered prescriber will review your case the same day.