Thinking about Mounjaro? Before it can be prescribed, you'll need to meet specific medical criteria and undergo a clinical assessment to determine whether it's suitable for you.
Because it is a prescription-only medicine, a qualified healthcare professional will determine whether it is appropriate and safe for you based on your medical history and individual circumstances.
This guide explains the Mounjaro requirements in a clear, easy-to-understand way: who is eligible, what the BMI criteria are, what the online questionnaire and prescribing checklist involve, who should not take it, and how to qualify for Mounjaro through a regulated pharmacy.
Mounjaro is a brand of tirzepatide, a once-weekly injection made by Eli Lilly and licensed for weight management and type 2 diabetes.
Quick answer: To be considered for Mounjaro for weight management privately in the UK, you will typically need a BMI of 30 or above, or 27 or above with a weight-related health condition, alongside a commitment to diet and lifestyle change. On the NHS, access follows NICE Technology Appraisal TA1026, which currently focuses on a BMI of at least 35 with a weight-related condition, introduced in phases. Everyone must pass an individual clinical assessment, and a prescriber has the final say. Treatment suitability depends on an individual clinical assessment.What Is the Criteria for Tirzepatide Mounjaro?
The eligibility criteria for Mounjaro can be considered in three parts: your BMI (Body Mass Index (BMI)), your health history, and your suitability once a prescriber has reviewed everything. Meeting the BMI threshold alone is not enough; it is a starting point, not a guarantee, and eligible patients still need to meet eligibility criteria in full.
The clearest way to understand Mounjaro qualifications is to separate the private route from the NHS route, because the thresholds differ; the following criteria make that comparison clearer.
| Route | Typical eligibility | Notes |
|---|---|---|
| Private (regulated pharmacy) | Typically considered where BMI is 30 or above, or 27 or above with a weight-related condition, subject to clinical assessment. | Assessment for this weight loss medicine also includes a commitment to diet and activity change; individual assessment applies. |
| NHS (NICE TA1026) | BMI of at least 35 with at least 1 weight-related condition. | Introduced in phases through primary care; threshold usually reduced by 2.5 for certain ethnic groups. |
Examples of weight-related conditions that may be considered during assessment include type 2 diabetes, high blood pressure, raised cholesterol, obstructive sleep apnoea and cardiovascular disease. The National Institute for Health and Care Excellence (NICE) draws on the same kinds of conditions in its guidance.
Things to know:
- BMI is the initial step, not the whole decision.
- Private and NHS criteria are different, with the NHS threshold currently higher.
- A weight-related health condition can make you eligible at a lower BMI.
- A prescriber must confirm suitability in every case.
You can read more about the medicine itself on our Mounjaro treatment page, and explore the wider options on our medical weight loss hub.
Mounjaro on the NHS: NICE TA1026, Specialist Weight Management Services, and Your Care Plan
Access to Mounjaro on the NHS is set by national policy from NHS England, NHS guidance and the National Institute for Health and Care Excellence (NICE), specifically Technology Appraisal TA1026.
Because demand is high and NHS resources are limited, access is being introduced in stages, starting with people who have the greatest clinical need. It was initially available through specialist weight management services, part of the wider NHS weight management services and is now being extended through a primary care prescription pathway, coordinated locally by each integrated care board (ICB). NHS England has announced a phased rollout through local NHS pathways. Availability and implementation may vary between areas and may change over time.
When Mounjaro is prescribed as an NHS treatment, it is meant to form part of a wider NHS care plan rather than being used on its own. A patient prescribed tirzepatide receive support from a healthcare professional and where appropriate, the wider healthcare team. This may include advice on healthy eating, physical activity and other aspects of weight management, alongside ongoing clinical support.
The BMI threshold is also adjusted for ethnic background. For people from South Asian, Chinese, Middle Eastern, Black African or African Caribbean ethnic backgrounds, the usual body mass index threshold is reduced, typically by 2.5, reflecting an increased risk at a given weight.
In England, standard NHS prescription charges apply unless you qualify for free prescriptions or have a valid exemption. NHS prescriptions are free in Scotland, Wales, and Northern Ireland.
Before prescribing Mounjaro through the NHS, your healthcare team will access your medical history and whether you meet the relevant eligibility criteria.
If you do not currently meet the NHS eligibility criteria, you may be able to access tirzepatide through a regulated private healthcare provider following a clinical assessment. NHS eligibility criteria are separate from the requirements for a private prescription.
Mounjaro Requirements and Eligibility Criteria: The Full Eligibility Picture
Beyond BMI, several requirements for Mounjaro come together to decide whether treatment is appropriate.
- Age. Mounjaro is for adults, and you must be at least 18 years old to access it through MedExpress or a similar regulated private provider.
- BMI and health conditions. As above, providers review body weight and either a qualifying BMI or a lower BMI alongside a weight-related condition.
- Previous efforts. Providers usually expect that you have tried to lose weight through diet and lifestyle changes.
- Commitment to lifestyle change. Mounjaro supports, and does not replace, a reduced-calorie diet and increased physical activity.
- No contraindications. Your medical history must not include conditions that make the medicine unsuitable or unsafe for you.
The next section explains what your prescriber will consider during the assessment.
The Mounjaro Prescribing Checklist: What a Prescriber Verifies
When you apply, a suitable healthcare professional works through a mental prescribing checklist to confirm Mounjaro is right for you. Understanding it helps you prepare for the questionnaire.
An appropriate healthcare professional will typically check:
- Your height and weight, to calculate your BMI accurately.
- Any weight-related health conditions you have.
- Your full medical history, including heart, digestive, pancreatic and thyroid conditions.
- All medicines and supplements you currently take, to check for interactions.
- Some providers may request blood tests where clinically needed as part of the assessment.
- Whether you are pregnant, trying to conceive or breastfeeding.
- Your previous weight-loss attempts and your readiness for lifestyle change.
- Any history of eating disorders or mental health considerations.
If anything on this list raises a concern, the prescriber may ask for more information, suggest an alternative, or decide the treatment is not suitable. Tirzepatide (Mounjaro) should only be prescribed when the assessment supports safe use. Not every applicant is approved, and that is a safety feature, not a flaw.
Who Cannot Take Mounjaro
Just as important as who qualifies is who should not take Mounjaro, or who needs specialist advice first.
Mounjaro is generally not suitable, or requires careful specialist input, if you:
- Are pregnant, trying to conceive or breastfeeding.
- Have a personal or family history of medullary thyroid cancer, or the condition multiple endocrine neoplasia type 2 (MEN 2).
- Have had pancreatitis (inflammation of the pancreas).
- Have certain serious digestive conditions, such as severe gastroparesis.
- Are under 18 years of age.
- Have type 1 diabetes, as Mounjaro is not a substitute for insulin.
- May be at risk of low blood sugar, especially if you also use other glucose-lowering medicines, as this may require extra review first.
This is not a complete list, which is exactly why an individual clinical assessment is essential. Your prescriber will determine the appropriate treatment, and this medicine should only be used under the supervision of an appropriately qualified prescriber, particularly as it was originally developed to treat diabetes and still needs careful oversight when used for weight management.
Mounjaro, Contraception and Reproductive Health
One requirement is easy to overlook but matters for sexual and reproductive health.
Tirzepatide may reduce the effectiveness of oral contraceptives in some circumstances, particularly when treatment is started or the dose is increased. These medications affect contraception through changes in digestion, particularly when treatment begins and when the dose is increased.
For this reason, women who could become pregnant and who use an oral contraceptive are generally advised to add a barrier method, such as condoms, for a time, or to switch to a non-oral method. Always check the patient information leaflet and confirm the current advice with your prescriber.
This is part of why pregnancy, conception and reproductive health are reviewed so carefully during the assessment.
The Mounjaro Questionnaire and Online Assessment
Most people now access Mounjaro through an online clinical assessment, and the Mounjaro questionnaire is the heart of that process.
The questionnaire is an important part of the clinical assessment process. It gathers the information a prescriber needs to apply the checklist above safely, without seeing you in person.
A typical online assessment will ask about:
- Your height, weight and resulting BMI.
- Your weight-related and general medical history.
- Your current medicines and any allergies.
- Pregnancy, conception and breastfeeding status.
- Your previous weight-management efforts and goals.
Answering honestly and completely is in your own interest, because the assessment is what keeps the treatment safe. A UK-licensed prescriber then reviews your answers and decides whether to approve, request more detail, or recommend an alternative.
If an injection is not right for you, some people consider an oral option instead, and our Wegovy Pill prescription guide explains how that pathway and its eligibility work.
How to Qualify for Mounjaro: Step by Step
Bringing it together, here is how to qualify for Mounjaro through a regulated UK pharmacy.
- Check the basic criteria. Confirm your BMI is 30 or above, or 27 or above with a weight-related condition.
- Complete the online questionnaire. Provide accurate details about your health, history and medicines.
- Independent prescriber review. A UK-licensed prescriber assesses your answers against the prescribing checklist.
- Approval or alternative. If suitable, treatment is approved; if not, the prescriber explains why and may suggest another option.
- Dispensing and delivery. Genuine medication is dispensed by a GPhC-registered pharmacy and delivered appropriately.
- Ongoing review. Follow-up checks monitor your progress, tolerance and continued suitability.
This prescribing process is designed to help ensure that Mounjaro is prescribed safely and appropriately. Products offered without a clinical assessment or through unregulated sources may not meet the same safety standards and should be approached with caution.
MedExpress and Other Providers: How Mounjaro Criteria Compare
People often search for the Mounjaro criteria or eligibility used by specific providers, such as MedExpress, to see whether the rules differ between pharmacies.
Legitimate UK online pharmacies operate within the same regulatory framework, overseen by the General Pharmaceutical Council (GPhC) and the Medicines and Healthcare products Regulatory Agency (MHRA). Because of this, the core medical criteria are broadly consistent from one regulated provider to another, since they all rest on the same clinical evidence and safety requirements.
You may see small differences in how each provider words its questionnaire, presents its BMI thresholds, or structures its follow-up, but the fundamentals, a qualifying BMI, an honest medical history and a prescriber's judgement, are common to all responsible services. No compliant provider can safely skip the assessment.
Rather than comparing marketing claims, the most useful things to check are that any provider is GPhC-registered, offers genuine independent prescriber review, supplies authentic medication and is transparent about pricing and aftercare.
Mounjaro Samples for Healthcare Professionals
Although most enquiries come from patients, some are from healthcare professionals seeking information about Mounjaro samples.
It is worth being clear that a patient-facing pharmacy does not provide free drug samples. Mounjaro is a prescription-only medicine, dispensed to named patients after an assessment, not handed out as samples.
Healthcare professionals who want product information or prescribing resources should contact the manufacturer, Eli Lilly, through its official medical and healthcare-professional channels. Prescribing information and the Summary of Product Characteristics are also available through the electronic medicines compendium.
The Evidence Behind the Criteria
The eligibility criteria exist because Mounjaro is a powerful medicine with strong clinical evidence, and it is targeted at those most likely to benefit, Tirzepatide works by acting on receptors involved in appetite regulation and glucose control.
In the pivotal SURMOUNT-1 trial, published in the New England Journal of Medicine, 2,539 adults with obesity, or overweight with a weight-related complication, received tirzepatide or placebo for 72 weeks. Average weight reductions reached up to 22.5% on the highest dose, compared with 2.4% on placebo.
Results like these are why access is managed through eligibility criteria and clinical oversight rather than open sale, and why the NHS route under NICE TA1026 prioritises those with the highest clinical need first. Results vary between individuals, and Mounjaro is intended to be used alongside diet and physical activity; Tirzepatide is also licensed for type 2 diabetes and affects pathways involved in blood glucose regulation.
Key Takeaways
- Mounjaro is prescription-only, and eligibility always depends on an individual clinical assessment.
- Private criteria are usually a BMI of 30 or above, or 27 or above with a weight-related condition.
- NHS access under NICE TA1026 currently focuses on a BMI of at least 35 with a weight-related condition, introduced in phases.
- A prescriber checks your BMI, medical history, medicines and pregnancy status before approving.
- Mounjaro is not suitable in pregnancy, with certain thyroid cancers, a history of pancreatitis, or under 18, among others.
- Regulated UK providers apply broadly consistent criteria because they follow the same GPhC and MHRA framework.
- Mounjaro (tirzepatide) is made by Eli Lilly, and samples are a manufacturer matter, not a patient-pharmacy one.
Medical Disclaimer
This article is for general information and educational purposes only. It explains Mounjaro eligibility, requirements, the clinical assessment and questionnaire, and how to qualify for treatment in the UK, but it does not constitute medical advice and is not a substitute for consultation with a qualified healthcare professional, pharmacist or prescriber.
The eligibility criteria described here, including the private BMI thresholds and the NHS NICE TA1026 criteria, are general and can change over time, and they are applied differently to each person. Nothing here recommends Mounjaro or any dose, and it does not provide dosing instructions and does not guarantee access to treatment or any weight-loss outcome. Meeting a BMI threshold does not by itself mean the medicine is suitable or safe for you.
Mounjaro (tirzepatide) is a prescription-only medicine that should be used for weight management only where clinically appropriate, alongside a reduced-calorie diet and increased physical activity, and only under the supervision of an appropriately qualified prescriber. Treatment suitability depends on an individual clinical assessment. Your prescriber will determine the appropriate treatment for you, and results vary between individuals.
If you are considering Mounjaro and have any existing health conditions or take other medicines, discuss them with a prescriber or pharmacist first. If you experience severe or persistent side effects while using Mounjaro, such as ongoing vomiting or severe abdominal pain that may spread to the back, seek medical advice promptly or call NHS 111. In an emergency, call 999.
