You've reached your ideal weight on Mounjaro — now what?

The moment most people don't plan for: you've hit your goal, and the pen is still in the fridge

You set a number. You reached it. That's genuinely worth pausing on. But a question our prescribers hear most weeks, usually around the third or fourth month of treatment, is: "If I've lost the weight, why would I keep paying for Mounjaro?" It's a fair question, and the honest answer is that it depends entirely on your clinical picture.

Tirzepatide works because it engages two gut-hormone receptors involved in appetite regulation and how quickly your stomach empties. When the medicine is stopped, those signals return to their previous pattern. Clinical evidence from the broader SURMOUNT programme shows that weight can begin to return after stopping tirzepatide, not because something has gone wrong, but because the underlying biology reasserts itself. How much weight people lose on Mounjaro in trials reflects continuous use alongside lifestyle changes; the maintenance picture is a separate conversation.

Some people taper to a lower dose and hold there, and if you're curious how much weight you can lose on 2.5 Mounjaro as a starting or maintenance dose, that question has a dedicated page worth reading before your next prescriber conversation. Others, who have made durable lifestyle changes and whose prescriber agrees the risk-benefit picture supports it, trial stopping. Others stay at a maintenance dose indefinitely. None of those outcomes can be decided by a pricing page. What a pricing page can do is make sure you understand what you're paying for when that clinical conversation leads to "continue for now".

What UK private Mounjaro actually costs, and what that figure usually does or doesn't include

UK private pricing for tirzepatide has shifted considerably. Eli Lilly raised Mounjaro's list price from 1 September 2025; if you want to understand what happened to Mounjaro's price and why reported market figures moved so sharply, that page covers the background in detail. Reported market prices since then range roughly £149–£375 per month depending on dose and provider, though these figures move and individual providers set their own charges above the list price. Take those as indicative rather than fixed.

The more useful question is what a headline monthly price covers. Some providers charge separately for the consultation, the prescription, delivery, and any dose-review support. Others bundle some but not all of those in. If you're staying on Mounjaro at maintenance, you'll still need clinical re-review before each supply, that's not optional under UK law for a Prescription-Only Medicine. A price that doesn't include it will add it somewhere, or won't be doing it at all. Mounjaro pricing in the UK is explored in more detail on our dedicated cost page if you want the fuller breakdown.

At nume, we don't win on price. That's a deliberate choice. One transparent price covers consultation, prescription, treatment, next-working-day DPD delivery, and seven-day aftercare support. No line items that appear at checkout. You can check the current treatment pricing before you start; it won't change between clicking and paying.

Why the cheapest option is the wrong filter once you're maintaining

Reaching your ideal weight doesn't reduce the importance of clinical oversight, it probably increases it. Maintenance is where dose decisions get subtle: coming down too fast can trigger rebound appetite; staying too high when it's no longer necessary adds cost and side-effect exposure. Those are prescriber calls, grounded in how you're doing right now, not in what was prescribed three months ago. It's also worth understanding how much weight you can lose on Mounjaro 5 mg, since many people settle at this dose during the maintenance phase and want a realistic picture of what to expect.

Tirzepatide is a Black Triangle medicine, meaning the MHRA requires additional monitoring of its safety profile; it's also available only on prescription following clinical assessment, for good reason. The clinical team at nume reviews your case before each supply. That's the substantive thing a low-priced, lightly supervised service tends to skip. The MHRA has warned publicly about counterfeit GLP-1 pens sold through unverified online sellers, fake pens have, in some seized cases, contained insulin rather than tirzepatide. A small monthly saving does not offset that risk. You can verify any UK online pharmacy on the GPhC register; nume's registration number is 9012878.

For a prescription medicine at maintenance, the right question isn't "who is cheapest?" It's "who reviews my case properly before every supply?" Those two questions rarely have the same answer. If you'd like to explore whether there's a Mounjaro deal that suits your situation without compromising on clinical care, our deals page sets out what's currently available. See our FAQs if you have further questions about how the process works, or get in touch with the team directly.