Will a doctor prescribe semaglutide for weight loss in the UK?

What the official guidance says about prescribing semaglutide

NICE approved semaglutide (brand name Wegovy) for weight management in March 2023 under Technology Appraisal 875. The recommendation carries firm conditions: treatment must be delivered within a specialist weight management service, it is capped at a maximum of two years, and patients should be reviewed at six months, if weight loss is below five percent, continuing is not recommended. The BMI threshold is 35 or above with at least one weight-related condition, though this drops by 2.5 kg/m² for certain ethnic backgrounds. These are the rules a prescriber must follow on the NHS.

That framework matters because it explains why most GP surgeries cannot simply prescribe it. The specialist-service requirement means referral rather than a surgery appointment, and waiting lists for those services can stretch to months or years in many parts of England. A GP who is aware of these criteria may decline not because you are ineligible in principle, but because the commissioning structure does not allow them to prescribe it directly.

Separately, from April 2026 some GP practices may prescribe tirzepatide under the new NHS contract, but that is a different medicine, and semaglutide's NHS route remains through specialist services for now. If you have been told your surgery cannot help, that is accurate for most practices, not a reflection of your suitability for treatment.

What a private prescriber can do that your GP may not

Private independent prescribers are not bound by NHS commissioning rules. They assess patients against the licensed criteria in the medicine's Summary of Product Characteristics rather than NICE's specialist-service conditions. The licensed eligibility is broader: adults with a BMI of 30 or above, or 27 or above alongside a qualifying condition such as high blood pressure, type 2 diabetes, high cholesterol or obstructive sleep apnoea. If you are unsure whether you meet the criteria, our guide covering who can buy Wegovy and what the eligibility rules mean in practice is a good place to start. A clinician reviews your answers, your current health picture, and any medicines you take, and makes a professional judgment.

That is the route many patients explore when their GP cannot help. It is legal, regulated, and (provided you use a pharmacy on the GPhC register) your medicine comes through the same authorised UK supply chain. The clinical rigour should be identical: identity verified, weight confirmed, contraindications checked. The absence of a referral does not mean the absence of a clinical assessment.

If you are curious about the cost side of a private prescription, our guide to Wegovy pricing in the UK covers what a legitimate private prescription typically includes and why the headline figure varies between providers.

Red flags and how to spot a legitimate prescriber

Because demand for semaglutide is high, some sellers have tried to exploit the gap between NHS access and patient need. The MHRA has issued warnings about fake weight-loss pens sold online, some containing no active ingredient at all, and in a few cases containing insulin, which is dangerous. The MHRA's Yellow Card scheme allows anyone to report a suspect seller, and it is worth knowing what legitimate supply looks like before you search online.

A genuine private prescription for semaglutide requires a clinical consultation first. A prescriber must assess you before issuing a prescription, not after payment, not as a formality. The pharmacy dispensing it should be verifiable on the GPhC's public register. If a website offers Wegovy without any clinical review, that is a serious warning sign. Saving a small amount on the medicine itself is not worth the risk of receiving a counterfeit product.

At nume, every consultation is read and decided by a GPhC-registered independent prescriber on the day it arrives, not processed by software. Our pharmacy's GPhC registration number is 9012878, verifiable directly on the register. If you order before midday on a working day and are approved, your treatment is dispatched the same afternoon and delivered free the next working day by DPD, in plain packaging. You can read more about how our service works or look at how semaglutide treatment is structured before deciding whether a consultation makes sense for you.

What happens if semaglutide is not right for you

Not everyone who wants semaglutide will be suitable for it. Pregnancy, breastfeeding, or actively trying to conceive rules it out. It is not licensed for people under 18. Certain conditions (a personal or family history of medullary thyroid carcinoma, or a history of pancreatitis) require careful discussion, and the prescriber may decide against it. That is not a failure of the process; it is the process working as it should. Our page on whether your doctor can prescribe Wegovy explains how the clinical decision-making works and what a prescriber will typically consider.

If semaglutide is not the right fit, there are other licensed options worth exploring. Our weight-loss treatment overview sets out what is currently available in the UK and how the medicines differ in mechanism and evidence profile. A prescriber can talk through which option, if any, suits your circumstances. That conversation costs nothing to start.