How to Get Your Fifth Dose of Mounjaro: The Clinical Route Explained

Why the fifth dose isn't just a reorder button

Each Mounjaro KwikPen contains four weekly doses. By the time you're looking for your fifth dose, you've completed your first full pen. What happens next depends on which dose you're on and how your body has responded. If you started at 2.5mg (the initial strength used to help your system adjust rather than for its full therapeutic effect) your prescriber will typically consider whether you're ready to move up. That assessment matters.

UK law treats Mounjaro as a Prescription-Only Medicine under the Human Medicines Regulations 2012. That means no pharmacy, including an online one, can simply send you more without a valid prescription issued after a clinical review. If you've been using a pen at home and are wondering how to get an extra dose out of a Mounjaro pen, our guidance covers the practical side, though for the next supply, the conversation with your prescriber comes first. Our separate page on getting the last dose from a Mounjaro pen is also worth reading before you finish your current pen.

At our Mounjaro page you can read more about how the medicine works and what the evidence shows. The NICE appraisal of tirzepatide (NICE TA1026) and the NHS tirzepatide medicines page are also worth reading before your repeat review.

What a legitimate repeat review looks at

When you come back for your fifth dose, a responsible prescriber isn't just confirming you haven't lost the pen. They're checking real things: how much weight you've lost so far, whether you've experienced any side effects, whether your current dose is still appropriate, and whether there's any clinical reason to pause, adjust or stop.

At nume, transfer patients and anyone requesting a dose increase provide evidence of their current treatment and progress, that's not a hurdle for its own sake, it's how a clinical service stays safe. Our prescriber team, led by our clinical lead, follows GPhC guidance on every repeat. GP notification is part of the process. So is a Summary Care Record check where appropriate.

Some people starting to think about dose progression at this stage also want to make the most of every pen, and our page on how to get 5 doses out of a Mounjaro pen covers that question in detail. The short answer is that pen design and clinical dosing are separate conversations, and your prescriber is the right person for the second one.

Buying safely: what to check before trusting any online source

The appetite for Mounjaro has created a secondary market of sellers who don't operate through the licensed UK supply chain. The MHRA has warned explicitly about counterfeit weight-loss pens sold via social media and unregulated websites, some fake pens have contained insulin rather than tirzepatide, with serious consequences for the people who used them. In late 2025, enforcement teams seized approximately 20 million doses of illegally traded weight-loss medicines (around £45 million street value), and raided the first known UK site manufacturing counterfeit tirzepatide pens. The MHRA Yellow Card scheme lets you report both suspect side effects and suspect sellers.

The practical check is simple: any online pharmacy dispensing prescription medicines in the UK must be registered with the GPhC. You can verify any pharmacy directly at GPhC premises registration 9012878, that's the entry for our pharmacy. Red flags include sellers offering Mounjaro without requiring any clinical assessment, prices dramatically below current market rates, and discount codes attached to prescription medicines. A code clipped to a POM listing is a warning sign, not a perk.

For a broader look at the buying landscape, our guide to buying Mounjaro online in the UK walks through what legitimate supply looks like step by step.

How to get your next Mounjaro supply through nume

The process is straightforward. You complete a free repeat consultation, describing your progress, any side effects, your current weight. A prescriber reads it the same day. If everything checks out clinically, your prescription is issued and your pen is dispatched before the end of the working day (order before 12pm). It arrives with DPD the next working day, tracked, in plain packaging. Most people tuck the new pen in the fridge door when it arrives and continue their weekly routine without interruption.

There's one transparent price that covers the consultation, the prescription, the medicine and the delivery. Nothing billed separately, no subscription running in the background. If you haven't started yet and want to understand the full process from the first dose, the page on how to get Mounjaro in the UK covers the initial route. For those who started on the lowest strength, our 2.5mg starting dose page has relevant context too.

When you're ready, check your eligibility and start your free consultation, our prescribers are available seven days a week for aftercare and repeat queries.