How to buy tirzepatide 10mg in the UK: the legal route, step by step

What the clinical evidence tells us about the 10mg dose, and why the prescription route exists

NICE's recommendation of tirzepatide (TA1026, December 2024) is built on trial evidence from the SURMOUNT programme, which enrolled thousands of adults with obesity across multiple countries. SURMOUNT-1, published in the New England Journal of Medicine, showed average body-weight reductions of around 20–21% at the 15mg maintenance dose over 72 weeks, with lower doses contributing to the titration pathway that makes that outcome achievable, and those considering the ceiling of that schedule can find out more on the page covering the 15mg dose. The 10mg dose sits within that titration schedule, prescribed after earlier doses have been tolerated and a prescriber has assessed whether stepping up is right for the individual.

This matters for anyone searching to buy tirzepatide 10mg specifically: you cannot start at 10mg. UK prescribers begin treatment at 2.5mg to allow the body to adjust, then titrate upward in stages. Reaching 10mg reflects clinical progress, not a purchasing decision. Any seller offering a specific dose straight off the shelf, bypassing that process, is a red flag worth taking seriously.

The MHRA licences tirzepatide for weight management in adults with a BMI of 30 or above, or 27 and above with at least one weight-related condition such as high blood pressure, type 2 diabetes or obstructive sleep apnoea. Lower BMI thresholds apply for some ethnic backgrounds under UK guidance. Suitability at 10mg is a clinical judgement, the prescriber weighs the full picture, not just a number on the scales.

The only legal way to get tirzepatide 10mg in the UK, and how to verify whoever you use

Tirzepatide is a Prescription-Only Medicine. To buy it legally, you need a prescription issued by a registered UK prescriber following a genuine clinical assessment. That prescription can then be dispensed by a GPhC-registered pharmacy. That's the complete legal pathway, consultation, prescription, dispensing.

For most people, the practical route is through a regulated online pharmacy. The GPhC register lets you verify any UK pharmacy by name or registration number before handing over personal or medical information. This check takes about thirty seconds and is the single most reliable way to confirm you're dealing with a legitimate operation. If a pharmacy isn't on that register, walk away.

The MHRA has issued clear public warnings about fake weight-loss pens circulating online and through social media. A raid in October 2025 uncovered the first illicit UK site producing counterfeit tirzepatide pens, seized alongside roughly 20 million doses of illegally traded weight-loss medicines worth around £45 million. Some counterfeit pens have contained insulin rather than the labelled medicine, causing serious harm. The tell-tale signs of illegitimate sellers are consistent: prices far below the market rate, no requirement for a prescription, and no verifiable pharmacy registration. Suspected sellers can be reported through the MHRA's Yellow Card scheme.

For more on navigating the online market safely, the guide to buying tirzepatide online covers the verification steps in detail.

How the process works at nume, from consultation to your door

At nume, the process starts with a free online consultation. You fill in your health history, current medications and weight information, and a GPhC-registered Independent Prescriber reviews it the same day. That's a named clinician, not an algorithm. If your consultation arrives before noon on a working day, your order is dispatched the same afternoon if clinically approved. Your pen arrives the next working day via DPD tracked delivery, in a plain box with nothing on the outside to indicate what's inside. The pen itself (a pre-filled Mounjaro KwikPen containing four weekly doses) comes refrigerated and ready to use with the Patient Information Leaflet.

Every repeat order goes through the same clinical re-review. There are no subscriptions and no automatic renewals. If a dose increase is being considered, the prescribing team checks for supporting evidence of weight change and tolerance before moving forward. Patients transferring from another provider are asked for evidence of their current treatment.

You can read about the clinical team behind those reviews on the prescriber profile page, and see the full treatment range at the consultation hub. If stock availability at a specific dose is something you want to confirm before starting, the tirzepatide stock page has current information.

Eligibility at a glance, and why 10mg specifically is a prescriber's call

The licensed eligibility criteria for tirzepatide in the UK, per the MHRA and confirmed by NICE TA1026, are adults aged 18 and over with a BMI of 30 or above, or 27 and above alongside at least one weight-related condition. Those conditions include type 2 diabetes, prediabetes, high blood pressure, raised cholesterol, obstructive sleep apnoea, and cardiovascular disease. BMI alone doesn't guarantee a prescription, the prescriber assesses contraindications, current medications and overall clinical suitability.

The 10mg dose in particular requires that the lower doses have already been prescribed and tolerated. If you're currently on treatment elsewhere and looking to continue, a transfer consultation is the right starting point. If you're new to tirzepatide, you can find out more about how to buy tirzepatide through a regulated provider, where treatment begins at 2.5mg and the prescriber guides titration from there. For a fuller picture of what to expect across the doses, the Mounjaro overview sets out the licensed schedule and what's known about each stage.

Tirzepatide is not licensed for use in pregnancy, breastfeeding, or for those actively trying to conceive, and it is not prescribed for under-18s. If any of those circumstances apply, the prescriber will discuss what that means for your options. Questions about how access works more broadly (including the NHS route) are covered in the how-to-get-tirzepatide guide.