Mounjaro UK: Prices, Providers and Doses

Last updated: April 2026

Whether you are new to tirzepatide or looking to compare what different UK providers are charging, this guide covers everything you need to know about Mounjaro in the UK — from how it works and who qualifies, to current prices, doses, and how it compares to Wegovy. LetsLoseWeight is an independent comparison site; we are not affiliated with any pharmacy or provider, and we do not sell or prescribe medication.

What is Mounjaro?

Mounjaro is the brand name for tirzepatide, a prescription-only injectable medication licensed by the MHRA for weight management in adults in November 2023. It belongs to a class of medicines known as dual GIP and GLP-1 receptor agonists — meaning it activates two hormone pathways involved in appetite regulation and blood sugar control, rather than the single pathway targeted by older GLP-1 medications such as Wegovy.

Mounjaro is manufactured by Eli Lilly and is administered as a once-weekly subcutaneous injection using a prefilled device called a KwikPen. It is not an oral tablet, and it is not suitable for self-administration without proper instruction from a prescriber or clinician.

In clinical trials, participants taking the highest doses of tirzepatide lost an average of approximately 20–22% of their body weight over 72 weeks. These are trial results in a specific study population — individual outcomes vary significantly and depend on many factors including starting weight, diet, activity levels, and adherence to treatment.

Who is eligible for Mounjaro in the UK?

Mounjaro is licensed for adults with a BMI of 30 kg/m² or above, or a BMI of 27 kg/m² or above in the presence of at least one weight-related health condition such as high blood pressure, type 2 diabetes, or raised cholesterol. This applies to private prescriptions. NHS eligibility criteria differ and are more restrictive (see below).

Online providers operating in the UK are required to conduct an appropriate clinical assessment before prescribing. This will typically involve questions about your medical history, current medications, and any conditions that might contraindicate use. Mounjaro is not suitable for everyone — it is contraindicated in pregnancy and in people with a personal or family history of certain thyroid tumours, among other conditions. A qualified prescriber is the only person who can assess your individual suitability.

How much does Mounjaro cost in the UK?

Private prices for Mounjaro vary across providers and rise with each dose tier. Based on current market data, the approximate monthly cost at each dose stage is:

2.5mg (starter dose): approximately £130–£220 per month
5mg: approximately £160–£265 per month
7.5mg–15mg (maintenance doses): approximately £200–£375 per month

These figures represent the range across GPhC-registered providers and are correct as of April 2026. Individual provider pricing changes frequently — always check the current price before ordering.

It is worth noting that following an Eli Lilly UK price increase in September 2025, Mounjaro became more expensive than Wegovy at comparable dose stages. At current rates, Mounjaro typically costs approximately £50–£100 more per month than Wegovy — a difference that can amount to £600–£1,100 over the course of a full year. For some patients, this cost gap is a significant consideration when deciding between the two medications.

For a full, up-to-date breakdown of what each provider is charging at every dose tier, visit our Mounjaro price comparison page.

Compare Mounjaro providers

Not all providers are the same. Differences between UK online providers typically include: price per dose, consultation fees, delivery speed, clinical support quality, and whether they offer ongoing dose-review appointments.

LetsLoseWeight lists only GPhC-registered providers. All providers on our platform have been verified as operating within UK regulatory requirements, and our ratings are based on verified patient feedback — not paid placements or commercial agreements. We do not recommend one provider over another; our role is to give you the information you need to make an informed choice.

To see how current providers compare on price, services, and patient ratings, visit our provider comparison page.

Mounjaro doses explained

Mounjaro uses a structured dose escalation schedule. Patients begin at the lowest dose to allow the body to adjust, and the dose is increased gradually over several months under prescriber supervision. The licensed dose steps are:

2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg

Typically, each dose is maintained for at least four weeks before stepping up. Not everyone will need to reach the highest doses — the appropriate maintenance dose for any individual is a clinical decision made by their prescriber, based on their response and tolerability.

Dose changes should never be made without prescriber guidance. Skipping dose steps or moving up too quickly increases the risk of side effects, particularly gastrointestinal symptoms such as nausea, vomiting, and diarrhoea.

Mounjaro vs Wegovy — which is right for you?

Mounjaro and Wegovy are both once-weekly injectable weight-loss medications, but they work differently and come at different price points. Mounjaro (tirzepatide) is a dual GIP/GLP-1 agonist; Wegovy (semaglutide) is a GLP-1 agonist only. In clinical trials, tirzepatide produced greater average weight loss than semaglutide, though direct head-to-head trial comparisons in a weight-management population are limited.

Following the Eli Lilly price increase in September 2025, Mounjaro is now typically the more expensive of the two options in the UK private market. Whether the potential difference in efficacy justifies the additional cost is a personal and clinical decision — one that should be discussed with your prescriber.

For a detailed, side-by-side comparison of both medications, including mechanism of action, dose schedules, clinical trial data, and current UK pricing, see our Mounjaro vs Wegovy UK comparison guide (coming soon) and our Wegovy UK guide.

Is Mounjaro available on the NHS?

Yes, but access is significantly restricted. In England, Mounjaro is currently being introduced through NHS Tier 3 specialist weight management services — it is not available from a standard GP appointment. To qualify via the NHS, patients typically need a BMI of 35 kg/m² or above (or 30 kg/m² with a qualifying comorbidity such as type 2 diabetes or hypertension), and must be referred to a specialist service.

Waiting times for these specialist services vary considerably by region but are currently 12–18 months in many areas. Availability may also depend on local NHS Integrated Care Board (ICB) funding decisions, which differ across England.

In Scotland, Wales, and Northern Ireland, prescription charges do not apply to NHS prescriptions. In England, the standard prescription charge of £9.90 per item applies — though patients who meet certain criteria (age, income, or medical exemption) may be entitled to free prescriptions.

How to get Mounjaro safely in the UK

The MHRA has issued warnings about counterfeit Mounjaro pens circulating in the UK. Counterfeit injectable medications pose serious health risks, including contamination, incorrect dosing, and infection. The only safe way to obtain Mounjaro is through a prescription issued by a regulated prescriber and dispensed by a GPhC-registered pharmacy.

Before purchasing from any online provider, check the following:

The provider is listed on the GPhC register (searchable at pharmacyregulation.org)
The prescriber conducting your consultation is registered with the GMC or another appropriate UK regulatory body
You receive a full clinical consultation — not just a checkbox form
The medication is delivered in original, tamper-evident manufacturer packaging

LetsLoseWeight only lists providers that have been verified as GPhC-registered. If you encounter a provider offering Mounjaro without a prescription, or at prices dramatically below market rates, treat this as a serious warning sign.

Frequently Asked Questions

How much does Mounjaro cost per month in the UK?

Private Mounjaro costs range from approximately £130–£220 per month at the 2.5mg starter dose, rising to approximately £375 at the highest doses. Prices vary between providers, so comparing across GPhC-registered providers before committing is worthwhile. Following an Eli Lilly price increase in September 2025, Mounjaro is now typically £50–£100 per month more expensive than Wegovy at comparable doses.

What is the starting dose of Mounjaro?

The starting dose is 2.5mg, given once weekly for at least four weeks. This is a dose-adjustment phase — 2.5mg is not considered a therapeutic weight-loss dose on its own. Your prescriber will guide you through the escalation schedule from there.

Can I get Mounjaro on the NHS?

Yes, but access is restricted. NHS Mounjaro is available through Tier 3 specialist weight management services for patients with a BMI of 35 or above (or 30+ with a qualifying health condition). Waiting times in many areas are currently 12–18 months. Mounjaro is not routinely available via a standard GP appointment.

How long does Mounjaro take to work?

Most people begin to notice appetite changes within the first few weeks of treatment. Meaningful weight loss typically becomes apparent within the first one to three months. Clinical trials ran over 72 weeks — sustained results are associated with continued use and lifestyle changes alongside medication.

What are the side effects of Mounjaro?

The most commonly reported side effects are gastrointestinal: nausea, vomiting, diarrhoea, and constipation. These are most common when starting or increasing the dose and often reduce over time. More serious side effects — though less common — include pancreatitis and gallbladder problems. Your prescriber should discuss all risks with you before starting treatment.

Is Mounjaro the same as tirzepatide?

Yes. Mounjaro is the brand name; tirzepatide is the active ingredient. They are the same medication. When you see references to tirzepatide in clinical studies or news coverage, they are referring to the same compound found in Mounjaro pens.

How does Mounjaro compare to Wegovy?

Both are once-weekly injectable weight-loss medications, but Mounjaro acts on two hormone receptors (GIP and GLP-1) while Wegovy acts on one (GLP-1). Clinical trials showed higher average weight loss with tirzepatide than with semaglutide. However, Mounjaro is currently the more expensive option in the UK private market following the September 2025 price increase. The right medication depends on your individual circumstances — discuss the options with your prescriber. See our Wegovy UK guide for more.

Clinical note: This guide is for informational purposes only. Nothing on this page constitutes medical advice, and no content here should be used to self-diagnose or self-treat. Only a qualified, registered prescriber can assess your suitability for Mounjaro or any other weight-loss medication. If you have questions about starting, changing, or stopping treatment, speak to your prescriber or a registered pharmacist.