Average monthly weight loss on Mounjaro — and what the numbers actually cost you

Step 1: understand what the monthly loss figures actually represent

The trial data is an average across a large population, not a personal forecast. SURMOUNT-1 randomised 2,539 adults with obesity over 72 weeks; at 15mg, participants lost around 20–21% of starting body weight on average. Spread across 18 months, that is roughly two to three kilograms per month in the middle of treatment, with faster early progress and a gradual plateau later. A person starting at 100kg might lose four or five kilograms in month one; someone at 85kg starting on the tolerability dose of 2.5mg will see much less in that same window. The month-by-month breakdown explains why the titration schedule matters so much to those early figures. The short version: the 2.5mg starting pen is there to help your system adjust, not to deliver maximum weight loss. Therapeutic effect builds as the dose increases, which is why the overall programme spans many months. If you want to understand how Mounjaro monthly weight loss tends to progress across the full dosing journey, framing your expectations around the full trajectory, rather than any single month, is the clinically honest way to read these numbers.

For a fuller picture of what the evidence shows across the dosing schedule, our breakdown by dose and month walks through the data in plain terms.

Step 2: understand how UK private pricing is structured, and what it usually covers

UK private Mounjaro pricing is quoted per pen, per month, and it shifts with dose. Since Eli Lilly raised its UK list price from 1 September 2025, the highest-dose pen's list price rose from around £122 to around £330, a significant jump that fed through to private market prices. Across providers, private pricing since then has typically ranged from roughly £149 to £375 per month depending on dose and service, as widely reported in the trade and consumer press through late 2025. Those figures are real, but they need context.

A headline price does not always include everything. Some providers charge separately for the consultation, the prescription, delivery, or dose-review support when you move from 5mg to 7.5mg. That matters when you are on Mounjaro for six or twelve months: those add-ons compound. The true monthly cost of Mounjaro is rarely the sticker price alone. Before comparing, it is worth asking exactly what the number covers. If you are researching where to find the cheapest Mounjaro jabs, a low per-pen price plus a £30 consultation fee plus a £6.99 delivery charge each month is a different proposition from a single, all-in figure. Mounjaro's monthly running costs are worth mapping out before you commit to any provider.

Step 3: what nume's pricing includes, and what we are honest about

nume's treatment pricing is shown on the treatment page. We do not print per-pen prices in article copy. What we will say plainly is this: we are not the cheapest option available in the UK, and that is a deliberate position. One price covers your consultation, your prescription, your treatment, next-working-day DPD delivery in plain unbranded packaging, and 7-days-a-week clinical aftercare. There are no separate fees when you need a dose review, no subscription locking you in, no renewal you did not choose. Every repeat order is looked at individually by a prescriber before it goes anywhere. Our clinical team's approach is explained on our prescriber profile.

We also do not run discount codes, vouchers or promotional pricing. Mounjaro is a prescription-only medicine; applying a coupon to a POM is not a concept that sits well with the clinical oversight it requires. If you have seen a discount code for Mounjaro from an unfamiliar seller, that is a red flag worth taking seriously, the MHRA has warned publicly about fake weight-loss pens sold online, some containing insulin rather than tirzepatide. The safe route is a pharmacy you can verify on the GPhC register, ours is registered under premises number 9012878.

Step 4: why price is the wrong first question for a prescription medicine

For most purchases, finding the lowest price is sensible. For a prescription-only medicine requiring clinical assessment, dose titration and ongoing monitoring, it answers the wrong question. The right question is whether the service behind the price gives you genuine prescriber oversight, a verified supply chain, and support if something goes wrong. A saving of £20 a month means little if the consultation was cursory, the product's provenance is unclear, or you cannot reach anyone when you have a concern at 7pm on a Sunday.

The NICE appraisal of tirzepatide (TA1026) frames Mounjaro as a clinical intervention that works best alongside diet, activity and ongoing support, not a standalone product you order and forget. That framing shapes how we build our service. Exploring what a clinically supported programme looks like may be more useful than a price comparison alone. When you are ready, your free consultation is the next step.