How much weight will you lose on 5mg of Mounjaro?

Step 1: understand where 5mg sits in Mounjaro's treatment schedule

Mounjaro (tirzepatide) is available in six UK strengths: 2.5, 5, 7.5, 10, 12.5 and 15mg. Treatment starts at 2.5mg for around four weeks to let your body adjust, with 5mg typically the second rung on that ladder. At 5mg you are still in an early tolerability phase for many people, which means the priority is settling the common gastrointestinal side effects — nausea, indigestion, changes to appetite — rather than achieving maximum weight loss.

That said, real-world weight loss does begin at 5mg. Appetite suppression is already active, gastric emptying slows, and most people find they are eating noticeably less without trying. The first few weeks on Mounjaro often bring modest but encouraging movement on the scales, driven partly by reduced calorie intake and partly by reduced fluid retention as eating patterns shift. If you want a detailed breakdown of how much weight you should lose on 5mg Mounjaro, our dedicated guide walks through what the evidence and real-world data suggest at this specific dose. Your prescriber will titrate the dose over time; the 5mg phase is part of a trajectory, not the endpoint.

The SURMOUNT-1 trial, published in the New England Journal of Medicine, followed nearly 2,539 adults over 72 weeks, and the headline figures of around 20% average weight reduction at the highest doses reflected the full titration sequence, not a single dose in isolation. NICE's appraisal of tirzepatide (TA1026) draws on that cumulative picture. Results at 5mg alone are modest precisely because they are supposed to be.

Step 2: understand what private Mounjaro pricing actually covers

UK private pricing for Mounjaro is set per monthly pen and varies by dose and provider. The published market context is worth knowing: following Eli Lilly's list-price revision in September 2025, typical private prices have ranged roughly £149–£375 per month depending on strength and where you source it, as widely reported at the time. The 5mg pen sits in the lower part of that range because the dose itself is lower, but that figure only answers part of the question.

What headline prices sometimes leave out is the clinical layer around the medicine. Consultation fees, prescription charges, delivery and ongoing dose-review support are all separate line items at some providers. A £149 figure that does not include a prescriber's review, or that bundles multiple doses into an auto-renewing subscription, is a different offer from one that includes everything. For a fuller picture of how pricing structures compare, our Mounjaro cost page sets out the market context in more detail. The question to ask of any quote is not just the monthly number but what sits behind it clinically.

Understanding typical costs is straightforward; understanding what clinical oversight comes with those costs is the harder, more important part. If you are curious about how much weight you will lose on tirzepatide across the full dose range, our guide gives a broader view of where 5mg sits relative to the doses that tend to produce larger results.

Step 3: know what the price actually includes at nume

At nume, one price covers everything: the consultation, the prescription, the treatment, tracked next-working-day DPD delivery, and aftercare seven days a week. There are no bolt-on fees and no subscriptions, each repeat order is reviewed clinically before dispatch. We are not the cheapest option on the market, and that is a deliberate choice, not an oversight. What the cost buys is a named prescriber reading your consultation on the day you submit it, photo-ID and live-weight checks before treatment starts, and a clinical team you can reach over the weekend if something does not feel right.

On a weight-loss treatment where the dose changes over months, clinical continuity matters more than saving a few pounds per pen. That is not a slogan; it is the practical reality of titrating from 2.5mg toward the doses where the larger weight-loss results sit. Our prescribers are GPhC-registered Independent Prescribers. You can verify our pharmacy on the GPhC register at registration number 9012878. If you order by 12pm on a weekday (roughly before the school run) and your consultation is clinically approved, your pen leaves the same day. Our about us page explains the clinical infrastructure behind that process.

Step 4: why cheapest is the wrong question to ask about a prescription medicine

For a Prescription-Only Medicine dispensed from a regulated supply chain, the cheapest listing answers the wrong question. The MHRA has issued repeated warnings about counterfeit and illegally traded weight-loss pens sold online; in 2025 alone, around 20 million doses with an estimated street value of £45 million were seized, including the first illicit UK manufacturing site producing fake tirzepatide pens. Sellers offering these medicines without a clinical assessment first, or with prices significantly below the market range, are a serious safety red flag. If you see a discount code offered for a prescription weight-loss medicine from an unverified source, that is the red flag, not a saving.

For anyone exploring what Mounjaro can genuinely achieve over the full course of treatment, our guide to how much you will lose on Mounjaro covers how results build across doses and what the clinical evidence actually shows. And if you are still working out whether this is the right route for you, our weight-loss treatment overview sets out the options. The first step is a free consultation, reviewed by a prescriber the same day. Start your free consultation when you are ready.