Who Qualifies for Weight Loss Injections in the UK

Step 1, Check the basic BMI and health-condition thresholds

The starting point for both licensed injections is your BMI. A BMI of 30 or above is the standard threshold for private treatment; if yours sits between 27 and 29.9, you can still qualify provided you have at least one weight-related health condition. Conditions that count include type 2 diabetes, prediabetes, hypertension, dyslipidaemia (high or abnormal cholesterol), obstructive sleep apnoea, and osteoarthritis among others. Lower BMI thresholds apply for some ethnic backgrounds under UK guidance, for South Asian, Chinese, Middle Eastern, Black African or African-Caribbean backgrounds, the clinical thresholds are typically 2.5 kg/m² lower. You can run a quick sense-check using the NHS BMI calculator before starting a consultation.

These thresholds come from the licensed indications of each medicine, they are not arbitrary gatekeeping. NICE's appraisal of tirzepatide, published in December 2024, sets NHS eligibility criteria that are considerably stricter than the private licensed threshold, so if you have been told you do not qualify for NHS treatment, that does not automatically mean you cannot access these medicines at all. Private eligibility follows the SmPC, not the NICE commissioning framework.

If you are unsure whether a condition you have counts, a prescriber can clarify that quickly. The personal eligibility check our team runs during a consultation is exactly the right place to ask.

Step 2, Understand what rules you out, not just what rules you in

Knowing what disqualifies someone matters just as much. These medicines are not licensed for use during pregnancy, and Novo Nordisk and Eli Lilly both advise stopping treatment before trying to conceive. They are also not recommended during breastfeeding. Anyone under 18 is outside the licensed indication. A personal or family history of medullary thyroid carcinoma, or a condition called MEN2 (multiple endocrine neoplasia type 2), is a contraindication for both medicines.

A history of acute pancreatitis requires a careful conversation with a prescriber before starting, the MHRA issued a Drug Safety Update in January 2026 highlighting acute pancreatitis as a known, if infrequent, risk with GLP-1 medicines, and providers need to weigh that history individually. Certain gastrointestinal conditions also require discussion. None of this is designed to discourage people, it is designed to make treatment safer for those who proceed.

Women taking the oral contraceptive pill and starting tirzepatide are advised to use an additional non-oral method of contraception for the first four weeks of treatment and after each dose increase, because tirzepatide's effect on gastric emptying may reduce pill absorption. That practical detail is worth knowing before your first pen arrives.

Step 3, Know how NHS and private routes assess eligibility differently

The NHS follows NICE guidance for both medicines, and the criteria are phased. For tirzepatide, NHS access from June 2025 required a BMI of 40 or above alongside four or more specific qualifying conditions; a second cohort covering BMI 35 to 39.9 with four or more conditions opened in June 2026. This rollout continues in stages through 2027. Wegovy is available on the NHS only through specialist weight management services, and waiting lists at those services are often very long. You can read more about how NICE guidelines shape NHS access if you want the detail.

Private treatment works differently. A GPhC-registered Independent Prescriber assesses you against the licensed indication (BMI 30-plus, or 27-plus with a qualifying condition) without the layered comorbidity requirements that apply to NHS commissioning. That is why many people who do not meet NHS criteria can still be prescribed these medicines privately through a regulated pharmacy. If you want to understand who can get weight loss injections through the private route, that page sets out every threshold in detail so you can compare your circumstances precisely.

Step 4, What happens once you meet the criteria

Meeting the BMI and health thresholds is necessary but not the whole story. A prescriber also reviews your medical history, any current medicines, and your overall clinical picture before approving treatment. At our pharmacy, that review is carried out by a named GPhC-registered Independent Prescriber on the same day as your consultation, a real clinician reads your answers, not an automated system. ID verification and live weight confirmation via video are part of the process.

If the assessment is straightforward and you order before midday on a working day, your treatment is dispatched the same day. A tracked DPD delivery arrives the next working day, in plain unbranded packaging, the pen itself is small, discreet, and already loaded for use. For practical information on what treatment costs and what that price covers, the weight loss injection pricing page explains the structure honestly.

If you want to explore the broader picture of what treatment involves before asking about eligibility, the weight loss treatment overview is a good place to start. You can also find a full breakdown of the qualifications for weight loss injections if you would like to review the clinical criteria in detail before speaking to a prescriber. And if you have a specific question our prescribers hear regularly but that the page does not cover, the FAQs section may have it. When you are ready, the next step is a free consultation with the clinical team, no commitment required.