NHS Approved Weight Loss Injections Explained

Which weight loss injections has the NHS actually approved?

The term 'NHS approved' gets used loosely, so it's worth being precise. In the UK, medicines licensing sits with the MHRA. Separate from that, NICE assesses whether a medicine is cost-effective enough to recommend for NHS use. Both steps matter.

Mounjaro (tirzepatide, made by Eli Lilly) received a positive NICE recommendation in December 2024, updated September 2025, that's NICE technology appraisal TA1026. Wegovy (semaglutide, made by Novo Nordisk) was recommended earlier, in March 2023, under NICE TA875. Both are licensed for weight management in adults with a BMI of 30 or above, or 27 or above if at least one weight-related condition is present, for example, high blood pressure, type 2 diabetes, or obstructive sleep apnoea.

Mounjaro works on two gut-hormone receptors (GIP and GLP-1), which is why it sits in its own class. Wegovy activates the GLP-1 receptor only. Both slow gastric emptying, reduce appetite, and help regulate blood sugar. Both are given as once-weekly subcutaneous injections and carry a Black Triangle status, meaning the MHRA keeps them under additional monitoring.

Ozempic, also semaglutide, is not licensed for weight loss, it's a diabetes medicine. That distinction matters if you're researching your options online, because the two are frequently muddled.

Who actually qualifies for these injections on the NHS right now?

This is where a lot of people get a frustrating answer. NHS access to NICE-recommended weight loss injections is being rolled out in phases, and the current thresholds are strict.

From June 2025, tirzepatide became available on the NHS for adults with a BMI of 40 or above alongside four or more specific weight-related conditions from a defined list: high blood pressure, dyslipidaemia, obstructive sleep apnoea, cardiovascular disease, and type 2 diabetes. A second cohort opened in June 2026, extending access to adults with a BMI of 35–39.9 who also have four or more of those conditions. Lower BMI thresholds apply for South Asian, Chinese, Middle Eastern, Black African, and African-Caribbean backgrounds under NHS guidance, typically 2.5 kg/m² lower throughout. You can read more about the phased rollout on the NHS weight loss injections page.

Wegovy on the NHS is available through specialist weight management services, not standard GP referral, and NICE specifies it should be prescribed for a maximum of two years within a multidisciplinary programme. If you want to understand more about how weight loss injections are funded and distributed through the NHS, waiting lists for specialist services are long in most parts of England and the picture varies considerably by region.

From April 2026, some GP practices can prescribe tirzepatide under the new GP contract, but participation varies, your practice may or may not be involved. Meeting the criteria on paper doesn't guarantee a prescription or a short wait. If you want to understand how NHS access actually works in practice, the picture is more complicated than a simple eligibility checklist suggests.

What happens if you don't qualify for the NHS route, or don't want to wait?

Private prescribing is a legitimate alternative. Many people are surprised to learn that a pharmacist can prescribe weight loss injections when they hold Independent Prescriber status, which is the qualification that allows them to assess and prescribe in the same way a doctor can. The licensed private criteria are broader than the current NHS thresholds: a BMI of 30 or above, or 27 or above with at least one relevant condition, assessed by a prescriber who reviews your full picture.

At nume, every consultation is read by a GPhC-registered Independent Prescriber, a real clinician, not an automated system. Identity and weight are verified before any prescription is issued. If approved before midday on a working day, treatment is dispatched that same day and arrives the next working day via DPD, in plain unbranded packaging, with tracking sent to your phone. For context on what private treatment costs and what a realistic price includes, the weight loss injection prices page covers that honestly. Treatment is never the cheapest option around, it's priced to include the consultation, prescription, and aftercare, with no subscription attached.

Whether you're considering the NHS route or a private one, the clinical eligibility bar is the same: a prescriber assesses you, and suitability is their call. There is no shortcut to that step. You can find out what the approval process involves before you start.

Are there side effects worth knowing about before you decide?

Both injections share a broadly similar side-effect profile. The most common effects are gastrointestinal: nausea, vomiting, diarrhoea, constipation, indigestion. These are typically most noticeable after starting treatment or after a dose increase, and for many people they ease within a couple of weeks. They're not trivial for everyone, but they're not usually dangerous.

The MHRA has highlighted acute pancreatitis as a known, less common but potentially serious side effect across GLP-1 medicines. Severe stomach pain that spreads to the back, particularly if it comes with vomiting, needs urgent medical attention. The MHRA's Yellow Card scheme is where patients can report suspected side effects, and the scheme is how post-market safety data gets updated over time.

Tirzepatide is not recommended during pregnancy, while breastfeeding, or if you're trying to conceive. It isn't licensed for anyone under 18. Women using oral contraceptives should use an additional non-oral method for the first four weeks of treatment and after each dose increase, because absorption of the pill may be affected. HRT users should discuss patch or gel options with their doctor for the same reason.

Our weight loss treatment overview covers both medicines in more detail, and our FAQs address a lot of the practical questions people have before starting. If you'd like to speak to our clinical team directly, you're welcome to start a free consultation, there's no obligation and no fee for the assessment itself.