Who Qualifies for Mounjaro? The Real Criteria, Clearly Explained

The biggest misconception: any BMI over 30 means automatic approval

People regularly assume that hitting a BMI of 30 is sufficient on its own. It isn't. The licensed threshold is a starting point, not a finish line. A prescriber reviewing your consultation also considers your weight-related conditions, your medical history, what other medicines you take, and whether there are any contraindications. Someone with a BMI of 31, no relevant comorbidities, and a history of pancreatitis may not be suitable; someone with a BMI of 28 and newly diagnosed hypertension may well be. The BMI number opens the door to a clinical conversation, not a rubber stamp.

There is also a common misreading of the two thresholds. A BMI of 27 or above is sufficient provided there is at least one qualifying weight-related condition. That list, per the licensed indication, includes type 2 diabetes, prediabetes, high blood pressure, dyslipidaemia (raised cholesterol or triglycerides), obstructive sleep apnoea, and cardiovascular disease, among others. A fuller breakdown of each qualifying condition is worth reading if you're close to the lower threshold.

The NHS patient information for tirzepatide outlines who the medicine is and isn't intended for. It's a good first read alongside, not instead of, a clinical assessment.

NICE criteria versus private eligibility: they are not the same thing

NICE recommended tirzepatide for NHS use in December 2024 (Technology Appraisal TA1026), but with thresholds considerably tighter than the licensed indication: BMI of 35 or above, plus at least one weight-related comorbidity, within a specialist NHS service. The rollout is phased, and access in primary care only became possible from April 2026 on a voluntary GP contract basis. If you don't meet those NHS criteria, or your area's practice hasn't signed up yet, you may wait a long time.

Private prescribing follows the licensed indication, not the NICE commissioning criteria. That means the 30 (or 27-plus-condition) thresholds apply. A private route through a regulated pharmacy gives access to a prescriber's assessment without referral or a waiting list, subject to clinical suitability. What that costs, and what it includes, is a separate and fair question. The recommendations chapter of NICE TA1026 sets out the NHS eligibility criteria in full for anyone who wants the official wording.

Scotland, Wales and Northern Ireland commission NHS treatment under different arrangements. If you're outside England, the NHS route will have its own local criteria; the private licensed thresholds remain the same UK-wide.

Age, pregnancy, and circumstances that rule Mounjaro out

Mounjaro is not licensed for anyone under 18. Full stop. If you want to understand exactly how the minimum and maximum age requirements work, the page covering the age criteria for Mounjaro sets it out clearly, though questions still come up frequently, particularly from parents asking on behalf of teenagers. The answer is the same regardless of BMI.

Women who are pregnant, breastfeeding, or actively trying to conceive should not take Mounjaro. There is no licensed use for these groups, and a prescriber will not approve it in those circumstances. For women of childbearing age who use oral contraceptives, there is an additional consideration: tirzepatide slows gastric emptying and may reduce absorption of the pill, particularly at the start of treatment and after each dose increase. NHS guidance advises adding a non-oral method of contraception for the first four weeks of treatment and for four weeks following any dose increase. Worth raising before your first prescription, not after.

A history of medullary thyroid carcinoma or Multiple Endocrine Neoplasia type 2 (MEN2) is a contraindication. So is a personal or family history that places those conditions in play. These aren't reasons to avoid asking; they're reasons the clinical consultation matters. Practical guidance from people already on treatment often touches on what to bring to that first conversation with a prescriber.

How the assessment actually works at a regulated pharmacy

At nume, every application is read by a GPhC-registered Independent Prescriber. Not a chatbot, not a scoring algorithm — a real clinician reads your answers. You'll verify your identity with photo ID and confirm your current weight on a short video call, so the BMI figure being assessed is accurate rather than self-reported. Your GP is notified in line with GPhC guidance. If you're transferring from another provider or requesting a dose above the starting strength, you'll be asked for evidence of your current treatment.

The starting dose is 2.5mg. That pen lives in the fridge alongside everything else, but don't be tempted to start the second one early, the titration schedule exists for good physiological reasons, and your prescriber sets the pace. If you're unsure how the dosing steps are structured, the page explaining codes for Mounjaro covers how each strength is identified and prescribed. Every repeat order goes through a fresh clinical review before dispatch. More about how the service is run is available if you want to understand the clinical structure before you start.

Once approved, treatment is dispatched the same day (for orders placed by 12pm Monday to Friday) and delivered free the next working day by DPD, in plain packaging. Check your eligibility by starting a free consultation, there's no obligation, and no charge for the assessment itself.