Mounjaro (tirzepatide) is being made available on the NHS in England for weight management, but access is tightly rationed and rolled out in phases — so most people who want it will not qualify straight away, and many turn to a regulated private service instead. Whether you can get it on the NHS depends on your BMI, your weight-related health conditions, and where you are in the phased rollout.
The short answer
Mounjaro is approved for NHS weight-management use, but it is not simply available to everyone with a high BMI. NHS access is being introduced gradually over several years, and in the early phases it is prioritised for people with the highest clinical need.
If you do not meet the current NHS thresholds — or you do not want to wait — you can access Mounjaro privately through a GPhC-registered pharmacy after a clinical consultation, provided treatment is clinically appropriate for you.
How NHS access to Mounjaro works
The National Institute for Health and Care Excellence (NICE) recommends which medicines the NHS should fund, and for whom. For weight management, this is a separate decision from the medicine simply having an MHRA licence — a licence means it is legal and safe to prescribe, while NHS funding decides who actually gets it for free.
Because demand is very high, the NHS is phasing Mounjaro in over a number of years rather than offering it to all eligible people at once. In practice this means the eligibility criteria used by the NHS are stricter than the general licensed criteria, and they are widening over time.
Who the NHS prioritises first
In the earliest phases, NHS Mounjaro for weight loss is generally aimed at people with a very high BMI who also have several weight-related health conditions (for example type 2 diabetes, high blood pressure, high cholesterol, obstructive sleep apnoea, or cardiovascular disease).
People with the highest BMI and the most linked conditions are typically seen first. If your BMI is lower, or you have fewer weight-related conditions, you may be eligible later in the rollout rather than now.
Where treatment is delivered
NHS weight-management prescribing is expected to sit within primary care and specialist weight-management services, alongside support with diet, activity and behaviour change. Your GP is the right first point of contact to ask whether you meet the current criteria in your area.
Why so many people look at the private route
The main reasons people consider a private prescription are timing and eligibility. Because the NHS rollout is phased, waiting lists and area-by-area differences mean that even eligible people may wait, and those who fall just outside the NHS thresholds may not qualify at all yet.
The general licensed eligibility for treatment is broader than the current NHS funding criteria. You may be considered for treatment if you are aged 18 or over and have:
- a BMI of 30 or above (obesity); or
- a BMI of 27–30 with a weight-related condition such as type 2 diabetes, high blood pressure or sleep apnoea.
A private prescription is only issued if a treatment is clinically appropriate and safe for you after an online consultation with a registered prescriber — it is never guaranteed.
NHS vs private: what actually differs
| Feature | NHS route | Private route |
|---|---|---|
| Who qualifies now | Stricter, phased criteria — highest clinical need first | Broader licensed criteria (BMI 30+, or 27–30 with a condition) |
| Cost to you | Free where funded | You pay per month; Mounjaro starts at £160/month |
| Waiting | May involve waiting depending on area and phase | Assessed promptly after a free online consultation |
| Support | NHS weight-management support | Ongoing prescriber support alongside lifestyle changes |
What Mounjaro is and how it works
Mounjaro (tirzepatide) is a weekly self-injection that activates two gut-hormone receptors — GLP-1 and GIP — at the same time. This helps reduce appetite and how much you eat, so it becomes easier to sustain a calorie deficit alongside diet and activity changes.
Treatment starts at a low 2.5mg dose and is increased gradually — 5, 7.5, 10, 12.5mg — up to a maximum licensed dose of 15mg, to help your body adjust.
In the SURMOUNT-1 trial, participants on the 15mg dose lost on average 22.5% of body weight over 72 weeks, alongside lifestyle support. Individual results vary; not everyone reaches this.
You can read more on our Mounjaro page, or compare it with the Wegovy injection and the Wegovy Tablet on our treatments overview.
Side effects to be aware of
As with any GLP-1-based medicine, side effects are common, especially when you start or increase the dose.
Common side effects (affecting more than 1 in 10 people) include nausea, diarrhoea, constipation, vomiting, decreased appetite and fatigue. These are often mild and settle as your body adjusts.
Serious but rare risks include severe allergic reaction, acute pancreatitis, severe hypoglycaemia (low blood sugar), severe gastrointestinal disease and worsening diabetic retinopathy. Seek medical help if you develop severe or persistent symptoms.
You can report any suspected side effect through the MHRA Yellow Card scheme at https://yellowcard.mhra.gov.uk/.
Who Mounjaro is not suitable for
Mounjaro is not suitable if you are pregnant, planning pregnancy or breastfeeding, or if you have type 1 diabetes, a personal or family history of medullary thyroid carcinoma or MEN2, a history of pancreatitis, severe gastrointestinal disease, an active eating disorder, severe liver or kidney impairment, or a known allergy to the active ingredient.
This is one reason a proper consultation matters — a prescriber checks your full history before deciding whether treatment is safe for you.
What Mounjaro costs privately
If you go through a regulated private pharmacy, you pay per month and the price depends on your dose. The online consultation itself is free — you only pay if a treatment is prescribed and you choose to proceed.
- 2.5mg — £160/month
- 5mg — £185/month
- 7.5mg — £240/month
- 10mg — £260/month
- 12.5mg — £275/month
- 15mg — £295/month
The cheapest starting price is £160/month for the 2.5mg dose.
How to check if you can start
Start by asking your GP whether you meet the current NHS criteria in your area — this is the right first step if you want the NHS route.
If you would prefer a private assessment, or you do not currently qualify on the NHS, you can complete a free online consultation to check your eligibility. A GPhC-registered prescriber reviews your answers, and medicine is only dispensed by our own UK pharmacy if it is clinically appropriate.
If you want to understand how a regulated service is set up and how to verify it, see our about page or get in touch. You can also browse more guides on our blog.
This article is for information only and is not a substitute for personalised medical advice. Weight-loss medicines are prescription-only, are not suitable for everyone, and are prescribed only after a clinical consultation with a GPhC-registered prescriber. Individual results vary. Always speak to a UK-registered pharmacist or doctor before starting or changing any prescription medication.
