How to apply for NHS weight loss injections — and what to do if the wait is too long

You've looked up your BMI, spoken to your GP, and you're not sure where you fit

That is probably the most common starting point. Someone hears that the NHS is funding these medicines, checks their BMI, and wonders whether they qualify. The honest answer is: it depends on which phase of the rollout is active when you ask, and on your health record as a whole.

The NHS commissioned tirzepatide under NICE guidance (TA1026, published December 2024) through a phased approach. The first cohort, which opened in June 2025, covers adults with a BMI of 40 or above who also have four or more of five specific weight-related conditions: high blood pressure, dyslipidaemia, obstructive sleep apnoea, cardiovascular disease, or type 2 diabetes. A second cohort (covering BMI 35–39.9 with four or more of those conditions) activated on 23 June 2026. A third phase, opening to BMI 40 or above with three conditions, is expected around March 2027.

For some ethnic backgrounds, including South Asian, Chinese, Middle Eastern, Black African and African-Caribbean backgrounds, the BMI thresholds are 2.5 kg/m² lower throughout, so the first cohort effectively starts at 37.5 for those groups. A full breakdown of the qualifying thresholds covers those details precisely.

Wegovy sits under separate NICE guidance (TA875) and is routed through specialist weight management services with multidisciplinary support, for a maximum of two years. Waiting lists for those services are, in most parts of England, considerable.

What the actual application process looks like on the ground

There is no single form you fill in. The route starts with your GP. You raise it at an appointment, your GP checks whether your BMI and health conditions meet the current phase criteria, and (if they do) they either refer you to a specialist weight management service or, from April 2026, may prescribe directly under the updated GP contract. That last part matters: GP practices opted into prescribing tirzepatide voluntarily under the 2026/27 QOF changes, so not every practice in England is doing it. Some areas have commissioned local pathways; others have not.

If your practice is participating, your GP will want to confirm your BMI (usually with a recent in-surgery reading), review your health conditions and medications, and make sure there are no clinical reasons to exclude tirzepatide. Every NHS patient also needs to take part in wrap-around diet and activity support, that is a condition of the prescription, not optional.

Scotland, Wales and Northern Ireland each commission these medicines differently. Thresholds and waiting times vary. If you are outside England, your GP is the right first port of call, and the NHS access overview has a summary of the devolved picture.

One practical note on timing: if you want to understand how to get a weight loss injection on the NHS, including which services to ask your GP about and what to expect at each stage, that page sets it out clearly. GP appointments are easier to get at certain points in the week, and if you are self-funding privately and place an order by noon on a weekday, same-day dispatch is possible, which can matter if you are travelling or just want treatment to arrive before a particular Monday.

If you do not meet the NHS criteria right now, private prescription is the other legal route

Private prescriptions for Mounjaro and Wegovy work the same way legally, a prescriber assesses you, decides whether treatment is clinically appropriate, and issues a prescription if it is. The eligibility criteria for private prescribing follow the medicines' licensed indications: adults with a BMI of 30 or above, or 27 or above alongside at least one weight-related condition such as hypertension, pre-diabetes, high cholesterol or obstructive sleep apnoea.

That is a broader pool than the current NHS phases. Someone with a BMI of 33 and high cholesterol would not qualify for NHS tirzepatide today but could be assessed for a private prescription. The clinical bar is still real, a prescriber reviews the whole picture, checks for contraindications, and makes an individual clinical decision. What getting approved actually involves explains that process step by step.

At nume, that assessment is carried out by a GPhC-registered Independent Prescriber who personally reads your consultation answers the same day. Photo ID and live weight verification are part of the process. It is worth understanding what private treatment costs before you start, and what a legitimate price actually includes, because private weight management pricing varies widely between providers. What you should not pay for separately on top of the medicine is the consultation, prescription and delivery; those are included in one transparent price at nume.

You can verify any online pharmacy at the GPhC register, our registration number is 9012878, verifiable directly at the GPhC pharmacy register. The MHRA has warned repeatedly about fake weight loss pens sold online without a proper prescription, including a major enforcement action in October 2025 that found counterfeit tirzepatide being manufactured in the UK. A GPhC-registered pharmacy dispensing through the licensed supply chain is a material safety distinction, not a marketing claim.

What happens after you start, NHS or private

Whichever route you take, treatment is not a one-time prescription. Mounjaro begins at 2.5mg and is titrated upward (typically in four-week steps) by the prescriber, based on how you are tolerating each dose and how your weight is responding. The NHS English guidance on weight management injections sets out what wrap-around support should look like alongside the medicine.

If you are considering the private route and want to understand more about how to get weight loss injections, including what the process looks like from first consultation through to dispensing, that page walks you through it in full. When you are ready to talk to a prescriber, check your eligibility with our clinical team, the consultation is free and there is no obligation to proceed.