Here is the direct answer: the current private prescription price for Mounjaro in the UK starts from £129.99 for a first order 2.5mg pen in 2026. Mounjaro is a prescription only medicine in the UK, so private treatment requires a clinical assessment with a qualified prescriber before it can be prescribed.
If you are a UK adult considering Mounjaro for weight management, this page explains the current pricing for each strength, what can affect the total cost, how private provider prices can differ, who can prescribe Mounjaro, and how private access compares with NHS availability. This can help you understand the costs before you decide whether treatment is suitable for you.
Key things to know
- The current first order price starts from £129.99 for a 2.5mg pen
- There is no verified way to predict whether Mounjaro prices will rise or fall later in 2026
- No single provider can reliably claim to be "the cheapest" across the whole UK market
- Private treatment does not usually require an NHS referral, but you still need a clinical assessment before a prescription can be issued
Genuine Mounjaro Pricing, 2026
| Strength | Regular price | Price with FIRST40 |
|---|---|---|
| 2.5mg | £169.99 | £129.99 |
| 5mg | £199.99 | £159.99 |
| 7.5mg | £249.99 | £209.99 |
| 10mg | £269.99 | £229.99 |
| 12.5mg | £299.99 | £259.99 |
| 15mg | £318.99 | £278.99 |
Across UK pharmacies, private prescription prices for Mounjaro can vary considerably. Some providers may charge around £120 per month, while others may charge more than £340, depending on the strength, provider and services included.
When comparing Mounjaro prices, look at the full cost rather than just the price of the pen. Check whether the price includes the clinical assessment, prescription, delivery or any other services.
These figures are a pricing snapshot at the time of writing. Prices and promotional offers can change, so check the current pricing table on our product pages before ordering.
How Much Is 5mg Specifically?
A first order 5mg Mounjaro pen costs £159.99 with code FIRST40, compared with the regular price of £199.99.
Mounjaro treatment normally starts at 2.5mg once a week. After at least 4 weeks, the dose may be increased to 5mg if your prescriber considers this appropriate. Further increases can be made in 2.5mg steps, with at least 4 weeks between increases.
The dose you need will depend on your individual treatment and how you respond to Mounjaro. You should only increase your dose when advised by your prescriber.
Will Mounjaro's Price Go Down in 2026?
There is no reliable way to know whether Mounjaro prices will go up or down later in 2026. Private pharmacy prices can change because of factors such as wholesale costs, supply, demand, promotions and each provider's pricing decisions.
For this reason, it is better to check current prices rather than rely on predictions about what Mounjaro may cost in the future.
This also applies to claims that prices are about to rise or fall. Unless a claim is supported by a clear and reliable source, it should not be treated as a confirmed prediction.
The UK market has also seen significant pricing changes in the past, including increases reported in September 2025. This is another reason to treat broad predictions about future prices with caution.
Is There a Genuine "Cheapest" Provider?
It is difficult to identify one provider as the cheapest across the whole UK market because prices and promotions can change. A provider that has the lowest price for one strength may not have the lowest price for another.
When comparing providers, look beyond the headline price. Check the price of your prescribed strength, whether you are eligible for a promotional offer, delivery charges, consultation fees and any other costs included in the service.
Some providers may also offer bundles or other packages, which can change the overall cost of treatment.
It is also important to check that you are using a legitimate pharmacy and qualified prescriber. In the UK, you can check whether an online pharmacy is registered with the General Pharmaceutical Council (GPhC).
A clear and verifiable price is more useful than a general claim that a provider is "the cheapest". Always check the current price and what is included before making a decision.
What Actually Affects What You Pay
- Your prescribed strength, from the lower starting dose through to higher maintenance doses
- Whether you are placing a first order using a promotion such as FIRST40 or are a returning customer using an offer such as DOSE25
- Whether you choose a single pen or a multi month bundle, where available
- Whether you choose standard or express approval, if both options are available
Prices can also vary between providers, so checking the current price for your specific strength gives you a clearer idea of what you will actually pay.
Remember that the lowest price is not always the only thing worth comparing. The clinical assessment, prescribing process, delivery arrangements and ongoing support may also be part of the service.
Private vs NHS: A Genuine, Balanced Comparison
Private and NHS access to Mounjaro work through different pathways.
With private treatment, you usually do not need an NHS GP referral. However, you still need a clinical assessment from an appropriately qualified prescriber, who will decide whether Mounjaro is suitable for you.
NHS access is based on NHS and NICE eligibility criteria and is being introduced in phases. Access can depend on your BMI, weight related health conditions, local services and where you are in the NHS rollout.
Private treatment is self funded, while NHS treatment is generally provided without a prescription charge if you are eligible through the NHS pathway.
| Private | NHS | |
|---|---|---|
| Referral needed | Usually no NHS GP referral | GP referral or specialist pathway may be required |
| Typical wait | Can be shorter, depending on provider and assessment | Can vary depending on local services and capacity |
| Cost | Self funded | Usually no prescription charge if eligible |
| Clinical assessment | Required before prescribing | Required as part of the NHS pathway |
If you are considering private treatment but are concerned about the cost, it is worth speaking to your GP about whether you may be eligible for NHS weight management support.
Ready to check current pricing for yourself? Start your free consultation.
Who Assesses You
Mounjaro should only be prescribed after an appropriate clinical assessment. Depending on the service, this assessment may be carried out by a doctor, pharmacist prescriber or another appropriately qualified prescriber.
A prescriber may review your medical history, current medicines, weight, relevant health conditions and other factors before deciding whether Mounjaro is suitable.
It is worth checking the professional credentials of the person prescribing your medicine and the registration status of the pharmacy supplying it. GMC and GPhC are different professional registers, so a provider should make it clear which type of healthcare professional is assessing and prescribing your treatment.
The assessment is an important part of safe prescribing. It is not simply an administrative step before you can order a pen.
Why Higher Strengths Cost More
Mounjaro is available in several strengths, from 2.5mg to 15mg. The price can increase as the strength increases, although the exact price difference depends on the pharmacy.
The higher strengths contain more tirzepatide per dose. Tirzepatide acts on GIP and GLP 1 receptors involved in appetite regulation, food intake and blood glucose control.
However, a higher strength should not be viewed as a "better" version of Mounjaro. Your prescribed dose should be based on your individual treatment needs and how you respond to the medicine.
As you move through the standard dose escalation schedule, your monthly treatment cost may therefore change. It is worth checking the price of the strengths you may be prescribed so that you can plan your budget.
Medical Disclaimer
This page provides general information about Mounjaro pricing in the UK. It is not a substitute for personalised medical advice, diagnosis or treatment, and it does not predict future prices.
Treatment suitability is assessed by a UK qualified prescriber during a clinical consultation. Pricing shown here is a snapshot at the time of writing and can change, so always check the current price and what is included before ordering.
Mounjaro (tirzepatide) can cause side effects, including nausea, diarrhoea, vomiting, constipation and other digestive symptoms. Side effects can vary between individuals and may be more noticeable when treatment starts or the dose is increased.
If you have concerns about side effects or your treatment, speak to your prescriber, pharmacist or GP. Severe or persistent abdominal pain, repeated vomiting, signs of dehydration or symptoms of a serious allergic reaction require prompt medical attention.
Do not start, stop or change your Mounjaro dose based on information on this page. Your treatment and dose should always be discussed with a qualified healthcare professional.
