Mounjaro®
Starting from £179.99/mo
Start journey Learn moreWhat private weight loss injection pricing really includes — and what it often doesn't
The biggest misconception: a low headline price means lower total cost
Most people searching for private weight loss injection prices are looking at the monthly figure and assuming it's all-in. It rarely is. Across the UK private market, that headline number frequently covers the medicine alone. The consultation fee (sometimes £30, sometimes £80, occasionally more) is billed separately. Prescription fees can sit on top of that. Delivery charges are common. Aftercare, dose-review support and follow-up clinical time? Often charged per contact.
Add those together over a year and the cheapest-looking option can work out significantly more expensive than a service that quoted a higher number to begin with. The monthly figure, on its own, answers the wrong question.
A practical check that takes less than a minute: before you commit to any online pharmacy, look it up on the GPhC pharmacy register. A registered pharmacy has a verifiable premises number you can search by name or postcode. If it isn't there, move on. The register is free and open to anyone.
Mounjaro (tirzepatide) and Wegovy (semaglutide) are prescription-only medicines. The MHRA is clear that they are not assessed or indicated for quick or cosmetic weight loss, and legitimate supply always flows through clinical assessment first. You can read the background on both medicines through the NHS tirzepatide medicines page and the equivalent NHS semaglutide page.
How UK private pricing is structured, and why Eli Lilly's 2025 list price rise matters
Pricing for these medicines shifted meaningfully in autumn 2025. Eli Lilly increased Mounjaro's UK list price from 1 September 2025, the highest dose's list price rose from around £122 to around £330 per four-week pen, as widely reported at the time. That change rippled through the private market, and prices that looked reasonable before September are now often out of date.
Typical private prices since then range roughly £149 to £375 per month, varying by dose, provider and what's bundled in. Lower doses sit at the bottom of that range; higher doses near the top. No two services price identically, and the dose you start on is not necessarily the dose you'll stay on, titration is clinically guided, so your monthly cost can change as treatment progresses. If you are based in Northern Ireland, you can find a regional breakdown of what to expect on the weight loss injections Northern Ireland price page.
For a fuller picture of how those figures break down across dose levels, the weight loss injection price guide covers the dose-by-dose detail. If you're comparing NHS versus private costs, the NHS weight loss injections pricing page sets out what NHS access currently looks like and who qualifies under the phased rollout.
NICE's appraisal of tirzepatide (TA1026) is the framework that shapes both NHS commissioning and the clinical thresholds private prescribers work within. Reading it gives useful context on who these medicines are intended for.
What's included in the nume price, and one honest thing to know going in
We price treatment as a single, transparent figure: the consultation, prescription, medicine, delivery and ongoing aftercare are covered. Nothing appears on checkout that wasn't visible at the start. There are no subscriptions and no auto-renewals; every repeat order is re-reviewed by a prescriber before anything is sent.
We are not the cheapest option in the UK market. That is a deliberate choice. The price covers clinical infrastructure that costs real money to run: photo-ID identity verification, live weight confirmation, GP notification in line with GPhC guidance, Summary Care Record checks where appropriate, and a prescriber reviewing your notes before every dispatch. Cutting those steps would cut the price. We don't.
If payment timing matters, the Klarna payment options page has the detail on how that works.
Current treatment pricing is shown on the treatment page alongside the eligibility outline. We don't publish per-pen prices in body copy, the correct figure depends on dose and clinical suitability, both of which a prescriber determines.
Why 'cheapest' is the wrong test for a prescription medicine
The MHRA has issued repeated public warnings about fake weight loss pens sold online, some containing insulin rather than tirzepatide or semaglutide, leading to hospitalisations. Around £45 million worth of illegally traded doses were seized in 2025 alone, including the first illicit UK site manufacturing counterfeit tirzepatide pens. The common thread in every case: sellers offering these medicines cheaply, with no clinical gatekeeping.
A small saving per pen is not the measure that keeps you safe. What matters for a prescription medicine is genuine supply chain, verified clinical oversight and a pharmacy you can check on a public register. What 'cheap' actually means in this market is worth reading if price is the primary concern, it covers the red flags in plain terms. For a broader look at how providers structure their fees and what those fees should cover, the weight loss injections costs page explains what a complete, legitimate service typically includes.
If anything goes wrong with a medicine or you suspect a seller, you can report it directly through the MHRA Yellow Card scheme. That tool is there for patients, not just clinicians.
The right question is not which service is cheapest. It is which service is safe, transparent and clinically sound. Those three things tend to correlate with a provider that charges fairly rather than minimally. To see whether treatment is appropriate for you, check your eligibility, our prescribers review consultations the same day.
Looking to start your weight loss journey?
Take a quick eligibility quiz to explore your options and see how we can support you.