Can My Doctor Prescribe Weight Loss Injections in the UK?

Step 1, Understanding who holds the authority to prescribe

There's a common assumption that weight loss injections sit outside what most doctors will touch. In practice, any registered UK prescriber with the appropriate clinical training can prescribe Mounjaro or Wegovy within their competence. That includes GPs, consultant physicians and GPhC-registered Independent Prescribers working in pharmacy settings. The medicines themselves are licensed by the MHRA; the prescriber's job is to assess whether you are an appropriate candidate.

What a prescriber looks at goes well beyond a BMI number. Medical history, current medications, kidney and liver function, any personal or family history of conditions flagged in the product's safety profile, all of it feeds into the decision. This is worth knowing because it explains why these medicines cannot legally be sold without a proper clinical review: the law isn't a bureaucratic inconvenience, it reflects genuine clinical stakes.

The licensed eligibility criteria for private prescribing broadly mirror the SmPC: adults with a BMI of 30 or above, or 27 or above where a weight-related condition such as hypertension, type 2 diabetes or high cholesterol is present. Lower BMI thresholds apply for some ethnic backgrounds under UK guidance. Meeting the numbers doesn't guarantee a prescription; the prescriber assesses the whole picture.

Step 2, The NHS route: what your GP can and cannot do

Your GP can, in principle, prescribe weight loss injections. Whether they will depends on the NHS access framework in place at the time. Tirzepatide (Mounjaro) is being rolled out through the NHS in phased cohorts under NICE's appraisal TA1026: from June 2025, adults with a BMI of 40 or above and four or more qualifying conditions became eligible; from June 2026 that expanded to include adults with BMI 35–39.9 meeting the same comorbidity threshold. From 1 April 2026 GP practices may prescribe under a new GP contract, though practice participation is optional and availability varies by area.

Wegovy (semaglutide) on the NHS sits primarily within specialist weight management services, with typically long waiting lists. Patients who qualify on paper may still wait many months. That gap between eligibility and access is one reason people explore how NHS prescribing actually works in practice before deciding whether to go private.

If your GP declines, it may simply mean you don't yet meet the current NHS cohort criteria, not that you're medically unsuitable. That distinction matters.

Step 3, The private route: how a GPhC-registered prescriber fills the gap

Private prescribing through a regulated online pharmacy is the faster, more accessible route for most people. A GPhC-registered Independent Prescriber reviews your consultation, checks your medical history and, in a service like nume's (sorry, like ours at nume) verifies your identity and weight on video before any medicine is dispensed. No algorithm makes the call. A named clinician does.

The process at a genuinely regulated service runs something like this: you complete a clinical consultation; a prescriber reviews it the same working day; if approved, your prescription is issued and the treatment dispatched from our GPhC-registered pharmacy. Our GPhC premises registration is 9012878, verifiable on the pharmacy register. Order before noon Monday to Friday and, once approved, treatment leaves us the same day for free next-working-day DPD delivery.

Cost is a fair question at this point. Private treatment is priced per pen and varies by dose and provider; since Eli Lilly raised UK list prices from September 2025, typical private prices have ranged roughly £149–£375 a month depending on the dose. For a full picture of what those figures usually do and don't include, our guide to what weight loss injection pricing actually covers walks through the detail.

Step 4 (What a responsible prescriber checks before saying yes

Across all routes) NHS or private, a responsible prescriber will want certain things confirmed. Current weight, ideally verified rather than self-reported. A record of any medicines you're already taking, because GLP-1 medicines slow gastric emptying and that can affect absorption of other drugs, including oral contraceptives. For tirzepatide specifically, women using the combined pill are advised to add a non-oral method of contraception for the first four weeks of treatment and for four weeks after each dose increase, NHS England's guidance on weight-management injections sets this out clearly.

A good prescriber will also notify your GP, ask about any history of pancreatitis, and confirm you have no contraindications listed in the product's clinical information. These checks exist because they matter clinically, not because they're hoops. If a service skips them, that's the red flag, not the checks themselves.

Questions about whether a doctor will prescribe these medicines are really questions about process. The process, done properly, is straightforward. Our FAQs cover the most common points patients raise before starting. When you're ready, you can start a free consultation and a GPhC-registered prescriber will review it the same day.