Can Doctors Prescribe Weight Loss Injections in the UK?

Which doctors are allowed to prescribe weight loss injections?

In the UK, any doctor registered with the GMC can prescribe licensed weight loss injections for a patient they have properly assessed. That includes your NHS GP, a hospital specialist, and doctors working within regulated private services. GPhC-registered Independent Prescribers (pharmacist prescribers, not just doctors) are also authorised to prescribe these medicines. What matters under UK law is that a qualified, registered prescriber carries out a genuine clinical assessment before any prescription is written.

The medicines themselves are tirzepatide, sold as Mounjaro, and injectable semaglutide, sold as Wegovy. Both carry a Black Triangle (▼) designation from the MHRA, meaning they are subject to additional monitoring as relatively new treatments. More background on licensed weight loss injections covers what each medicine does and how they differ mechanically.

What a prescriber cannot do is issue a prescription without a proper clinical review. Sellers offering these medicines without a valid prescription are operating outside UK law, and the MHRA has warned repeatedly about counterfeit pens entering the supply chain through unregulated channels. A prescriber who has not assessed you cannot safely sign a script for a prescription-only medicine.

Can a GP prescribe weight loss injections on the NHS?

GPs can now prescribe weight loss injections on the NHS, but access is phased and not yet universal. From April 2026, GP practices in England can prescribe tirzepatide under a new contract arrangement, though individual practice participation is optional. The current NHS cohort covers adults with a BMI of 40 or above plus four or more qualifying conditions from a set that includes type 2 diabetes, high blood pressure, dyslipidaemia, obstructive sleep apnoea and cardiovascular disease. A second cohort (BMI 35 to 39.9 with four or more of those conditions) became eligible in June 2026.

Wegovy is available on the NHS too, but only through specialist weight management services under NICE's appraisal TA875, which carries a two-year maximum duration and requires multidisciplinary support. Waiting lists for those specialist services are commonly long. For a fuller picture of the NHS route, this page on NHS weight loss injections sets out what is and is not currently available by cohort.

Scotland, Wales and Northern Ireland have their own eligibility frameworks; thresholds and timelines differ from England's. If you are outside England, check with your GP or health board directly.

What happens at a private prescription consultation?

Private prescribers (including those at regulated online pharmacies) follow the same clinical standards as NHS colleagues. At nume, a GPhC-registered Independent Prescriber personally reviews every consultation the same day it arrives. That means reading your full medical history, checking for contraindications, and making a clinical judgement about whether treatment is appropriate and which starting point makes sense for you. There is no algorithm making that call.

The process also includes photo-ID verification and live weight verification on video, so the prescriber can be confident the details you have provided are accurate. For anyone transferring from another provider or requesting a dose increase, evidence of current treatment is required before a prescription is issued. Who can prescribe weight loss injections goes into more detail about the qualifications and regulatory requirements involved.

If you are curious about how to get weight loss injections privately, the steps are straightforward once you know what to expect from a regulated consultation, including what information you will need to provide and how quickly treatment can begin. That said, a Monday order that lands before payday at the end of the month works just as well; the cut-off is 12pm on any Monday-to-Friday working day.

To understand the difference between a doctor-issued NHS prescription and a private one, doctor-prescribed weight loss injections explains both routes side by side.

What do prescribers look at before issuing a prescription?

A prescriber reviewing a weight loss injection request is checking several things at once: BMI and any weight-related conditions; current medicines (some interact with GLP-1 treatments, particularly oral contraceptives, which may absorb less reliably on tirzepatide in the early weeks); personal and family medical history relevant to contraindications such as a history of medullary thyroid carcinoma or pancreatitis; and whether the patient is pregnant, breastfeeding or planning a pregnancy, none of those situations are suitable for these medicines.

The NHS tirzepatide medicines page lists the full contraindication set in plain language and is worth reading before any consultation. People under 18 are not covered by the licence for either medicine.

Once a prescriber is satisfied that treatment is clinically appropriate, they decide on the starting dose and the medicine. That decision is theirs, not the patient's. You may have a preference, and it is worth raising; the prescriber will factor it in alongside the clinical picture. Talking to your own GP about weight loss injections covers how to approach that conversation if you would rather start with your existing doctor. If you are ready to speak to a prescriber now, check your eligibility with our clinical team, the consultation is free and there is no obligation.