Ready to Step Up to 10mg Mounjaro? Here's How to Buy It Safely in the UK

The clinical case for moving from 7.5mg to 10mg, and why it isn't automatic

Stepping up to 10mg Mounjaro (tirzepatide) is a meaningful clinical moment, not a formality. The dose schedule exists because your body needs time to adapt at each level; the jump from 7.5mg to 10mg is typically made after at least four weeks at the previous dose, and only when you've tolerated it well. A prescriber deciding whether this step makes sense for you will look at several things: how your weight loss has progressed, whether side effects have settled, any changes to your health since your last prescription, and whether you've been using the pen correctly.

Evidence that underpins this comes from the clinical programme that supports Mounjaro's UK licence, tirzepatide's dose titration was specifically designed to balance efficacy with tolerability. If you've been on 7.5mg and are ready to move forward, the question isn't just whether you want 10mg; it's whether your clinical picture supports it. A prescriber who skips that check isn't providing a service, they're cutting a corner that matters.

If you're transferring from another provider at 7.5mg and want to buy Mounjaro 10mg to continue your treatment, you'll need to show evidence of your current treatment. At nume, at nume, transfer patients go through the same rigorous same-day clinical review as everyone else. Worth having your previous prescription or dispensing record to hand before you start.

Verifying you're buying from a legitimate UK pharmacy

Mounjaro is a Prescription-Only Medicine. In the UK, the only legal route to it is through a registered pharmacy that issues a valid prescription following a proper clinical assessment. That sounds obvious, but the proliferation of sellers on social media and comparison sites has made it genuinely hard to tell legitimate from unsafe.

The fastest check you can do takes under a minute: go to the GPhC pharmacy register and search the pharmacy's name or registration number. Every legal online pharmacy dispensing prescription medicines in the UK must appear there. If a seller isn't listed, stop. If a price seems too low to cover a genuine clinical process, that's another signal worth heeding.

The MHRA has warned repeatedly about counterfeit weight-loss pens sold online and through social media channels, sellers offering these medicines without a prescription, at unusually low prices, or via unverifiable routes. Fake pens have in some cases contained insulin. The MHRA has made large seizures of counterfeit tirzepatide pens across the UK; you can report suspect sellers through the Yellow Card scheme. For context on what to look for, the NHS England weight-management injections guidance sets out what a supervised, legitimate pathway looks like.

nume's GPhC premises registration is 9012878, verifiable directly at pharmacyregulation.org. Medicines are sourced through the licensed UK supply chain from authorised distributors.

Who is eligible to step up to 10mg Mounjaro through a private prescription?

The licensed indication for Mounjaro in the UK covers adults with a BMI of 30 or above, or a BMI of 27 or above alongside at least one weight-related condition such as high blood pressure, type 2 diabetes, high cholesterol, or obstructive sleep apnoea. Lower thresholds apply for some ethnic backgrounds under UK guidance. Those are the licence criteria, your prescriber applies clinical judgement beyond them.

For a dose step-up specifically, you also need to have been established on the preceding dose for an appropriate period and tolerated it adequately. That's true whether you're stepping from 7.5mg up to 10mg, or looking ahead to 12.5mg after that. The NICE appraisal for tirzepatide (TA1026) recommends it for adults with a BMI of 35 or above plus at least one weight-related comorbidity on the NHS; private prescription criteria are broader, set by the licensed indication, and assessed case by case. BMI alone never guarantees approval, the full clinical picture does.

Mounjaro is not licensed for under-18s. It is not recommended during pregnancy, while breastfeeding, or when trying to conceive. If any of those apply to you, your prescriber will discuss options at consultation. Details on what a structured clinical assessment covers are on our FAQs page.

How the nume process works when you're ready to step up

The route is straightforward. You complete a free consultation through our treatment page, this covers your current dose, progress, any side effects, and relevant health history. A GPhC-registered Independent Prescriber reads it that day. Not a chatbot, not an automated scoring system, a clinician, reviewing your case personally.

If the step-up is clinically appropriate, you can buy Mounjaro 10mg online through us, with your prescription issued and your order dispatched the same day (Monday to Friday, if you're through by 12pm); if you're currently on the previous tier and need to move up gradually, you can also buy the 5mg step-up dose as part of a structured titration plan. The pen arrives free the next working day in plain, unbranded packaging via DPD, tracked, so you know exactly when to expect it. Our clinical team is available for aftercare questions seven days a week. Every subsequent repeat goes through the same clinical re-review; nothing is sent on autopilot.

If you have questions before starting, our support team can help. And if you're still weighing up whether this is the right route for you, our weight-loss overview covers how the different treatment options compare.