The UK Mounjaro price index: every dose tracked

If you're asking "what's the real price of Mounjaro in the UK right now", the honest answer is: it depends which pharmacy you ask. The Mounjaro price index UK shoppers actually need isn't a single number — it's a ranked table, because the same pen, same dose, same manufacturer varies by more than £80 a month between providers.

This report tracks the ongoing 4-week price for Mounjaro (tirzepatide) across 24 GPhC-registered pharmacies and CQC-regulated clinics, as recorded on 24 August 2026. Figures are for the 2.5mg starter dose, which is where every new patient begins and the point at which providers are most directly comparable.

The Mounjaro price index UK table (2.5mg, 4 weeks)

All providers below are GPhC-registered pharmacies, CQC-regulated clinics, or both. Prices and discount codes checked 01 September 2026 — always confirm the live price before ordering, as these move month to month.

For the full live board across all doses and both major GLP-1 brands, see our homepage price table, updated monthly.

Why the Mounjaro price index UK moves so much

Three factors explain most of the £83.01 spread:

• Regulatory model. Some providers run as a straightforward GPhC-registered pharmacy dispensing against a prescription; others operate as a CQC-regulated clinic bundling in a prescriber consultation and ongoing monitoring. That overhead shows up in the sticker price.
• Acquisition-led discounting. First-month prices as low as £122 (Chemist4U) or £125 (The Weight Clinic) are designed to win a new customer. The number that matters for your annual budget is the ongoing price, not the introductory one.
• Service inclusions. Video check-ins, dose-titration support and free delivery aren't always itemised, but they're rarely free to run. A £229 provider and a £146 provider are not necessarily selling identical experiences.

Reading the index by dose

Mounjaro dosing is staged: 2.5mg for the first four weeks (a starter dose, not a treatment dose), then 5mg, then increases in 2.5mg steps up to a maximum of 15mg, each step held for at least four weeks. Most providers price higher doses on the same tier structure as the 2.5mg starter, so a pharmacy sitting near the top of this table at 2.5mg is unlikely to become cheap once you titrate up. Our cheapest GLP-1 by dose tracker breaks out pricing rung by rung across the full dosing ladder.

If you want the wider market context — how Mounjaro sits against Wegovy and where the whole GLP-1 category has been heading this year — see our UK GLP-1 price index: July 2026 market report and UK GLP-1 price trends in 2026.

What Mounjaro actually does — the clinical baseline

Price only matters alongside outcome. In the SURMOUNT-1 trial, adults with obesity or overweight (without type 2 diabetes) lost an average of 16.0% of body weight on 5mg, 21.4% on 10mg and 22.5% on 15mg over 72 weeks, versus 2.4% on placebo. Around 90% of people on the 15mg dose lost at least 10% of their body weight. Mounjaro (tirzepatide) is MHRA-licensed for weight management and recommended by NICE under TA1026 (December 2024). Privately, it's typically available to adults with a BMI of 30+, or 27+ with a weight-related condition — a prescriber makes the final call on suitability, not the pharmacy's marketing page.

Side effects and the Yellow Card scheme

Common side effects include nausea, diarrhoea, constipation, vomiting and tiredness, usually most noticeable when a dose is increased. Rarer but more serious risks include pancreatitis, gallstones, dehydration leading to kidney strain, and low blood sugar if combined with insulin or a sulfonylurea. Any suspected side effect can and should be reported via the MHRA Yellow Card scheme, regardless of which provider you use.

Hidden costs the index doesn't show

A headline ongoing price rarely includes everything. Consultation fees, delivery charges, and what happens if you need a dose change mid-cycle can all add up. We've catalogued the common ones in the hidden costs of weight-loss injections — worth reading before you commit to any provider on this list, including ones near the top.

Where The Weight Clinic sits on the index

The Weight Clinic prices Mounjaro 2.5mg at £160/4 weeks ongoing, with a £125 first month and code NEWME — that's £35 off your opening order. It's a GPhC-registered pharmacy, it offers monthly video reviews as part of ongoing care, and it refunds you if a prescriber declines to prescribe. It doesn't top the index on price alone, but it's our recommended provider for the combination of cost, regulation and follow-up support — you can check current availability and pricing at The Weight Clinic before deciding.

How to use this index

1. Compare the ongoing price, not just the first-month offer — you'll pay the ongoing rate for most of a year.
2. Check the regulatory status (GPhC pharmacy, CQC clinic, or both) alongside the price.
3. Factor in what's included: consultation, delivery, dose-change support, monitoring.
4. Re-check the live price before ordering — this index is a snapshot from 24 August 2026, not a live feed.

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