How much is each dose of Mounjaro in the UK?

Why does the cost of each dose vary so much across the UK?

Mounjaro comes in six strengths (2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg and 15 mg) and each pen contains four weekly doses. Treatment starts at 2.5 mg and is titrated upward by a prescriber, typically in four-week steps, as your body adjusts. That titration structure means the price you pay each month changes as your dose increases: the pens at the top of the schedule cost considerably more than the starter pen.

The picture shifted sharply from 1 September 2025, when Eli Lilly raised the UK list price for tirzepatide. The highest-dose pen moved from around £122 to around £330 on the manufacturer's list, a change that fed through to private pharmacy pricing across the market. As widely reported at the time, typical private costs since that date range roughly £149 to £375 per pen per month, depending on strength and provider. You can read more about how these figures break down on our Mounjaro price guide.

One more variable: the clinical and dispensing services wrapped around the medicine. Two providers can quote different monthly figures for the same dose, and the gap can reflect very different levels of service, or very little service at all. If you want to understand how much one dose of Mounjaro actually costs before comparing quotes, that breakdown is a useful starting point.

What do headline prices sometimes leave out?

A number quoted on a website for a Mounjaro pen is not always the total you'll pay. It's worth asking (before committing to any provider) whether the following are included or charged separately.

Consultation fees are the most common addition. Some services charge £20–£50 for the clinical assessment that makes prescribing lawful. Prescription fees can also appear as a line item. Delivery costs vary: next-day courier services are not free everywhere, and some providers charge per dispatch. Aftercare is the quieter gap: once your pen has arrived, what happens if you have a question about a side effect, or need a dose review before your next order?

On dose-increase steps specifically, a legitimate service will require clinical evidence before moving you to a higher strength, that review takes prescriber time and should be built into the cost, not charged as an extra. If a provider moves doses freely with no re-assessment, that is a safety concern before it is a pricing one. Our full cost breakdown for Mounjaro covers these variables in detail.

If you're looking at a specific strength, our page on how much the 5 mg pen costs breaks down that particular step.

Where does nume sit on price, and what does that actually mean for you?

We're not the cheapest option in the UK market. That's a deliberate choice, not an oversight. The single price you pay with nume covers your consultation, the prescription, the medicine itself, free next-working-day DPD delivery in plain packaging, and priority aftercare seven days a week. There are no subscriptions and no auto-renewals: every repeat order is personally re-reviewed by a clinician before it goes out.

Our prescribers are GPhC-registered Independent Prescribers. A real clinician reads your consultation (not software) and reaches a decision the same day. That same-day clinical review is why orders placed before 12 pm on a working day, once approved, are dispatched the same afternoon. Payday orders, Monday-morning starts, pre-holiday top-ups: the 12 pm cut-off is the one thing worth planning around.

You can see our current treatment pricing on the weight-loss treatments page. We don't print per-pen prices in editorial copy because they can date quickly, especially after a manufacturer price change, it's fairer to show you the live figure in context. Our clinical team's approach to pricing and safety is explained on the about us page.

Is 'cheapest' the right question to ask about a prescription medicine?

For most purchases, lowest price signals a good deal. For a prescription-only medicine like Mounjaro, it signals something different. The MHRA has issued repeated public warnings about counterfeit weight-loss pens sold online, fake pens have been found to contain insulin rather than tirzepatide, and enforcement operations in 2025 seized roughly 20 million doses of illegally traded weight-loss medicines with an estimated street value of around £45 million. Some of those counterfeits were tirzepatide pens, and if you've ever wondered about what is actually in the golden dose of Mounjaro, understanding the medicine's genuine composition makes it easier to spot why counterfeits are so dangerous. You can report suspect sellers via the MHRA Yellow Card service.

Red flags to recognise: any seller offering Mounjaro without requiring a prescription, prices dramatically below the market range described above, social-media sellers, or discount codes attached to what is presented as a genuine pen. If you are unsure what a standard amount of the medicine should look like, our guide on how much a dose of Mounjaro should be is a helpful reference when assessing whether an offer seems legitimate. Discount codes for prescription medicines from unverified sellers are a meaningful warning sign, not a bargain.

The right question is whether the service is clinically robust, the supply chain is licensed, and the pharmacy is registered, verifiable at the GPhC register. For a broader look at what legitimate Mounjaro treatment involves, the Mounjaro overview page is a good place to start, or you can explore weight-loss treatment options more generally.

Price is one data point. Supply chain integrity, genuine clinical assessment, and aftercare are the ones that keep you safe.