Getting weight loss injections from your GP: what actually happens

The myth: your GP can prescribe these for almost anyone who asks

Many people arrive at a GP appointment expecting to walk away with a Mounjaro or Wegovy prescription, having seen headlines about how effective these medicines are. The truth is that NHS access is tightly rationed and phased in over several years. NICE's recommendation for tirzepatide (TA1026) currently limits NHS prescribing to adults with a BMI of 40 or above plus four or more specific weight-related conditions, including type 2 diabetes, high blood pressure, dyslipidaemia, obstructive sleep apnoea or cardiovascular disease. From around June 2026 a second cohort opens for BMI 35–39.9 with four or more of those conditions.

Even when a patient meets those criteria, participation in NHS prescribing is optional for GP practices, and every patient must engage with structured diet and activity support alongside treatment. Your GP may be supportive and still be unable to prescribe, simply because their practice hasn't joined the scheme or your local integrated care board hasn't activated it yet. It is worth checking directly, but don't assume a willing GP equals an immediate prescription.

If you'd like a clearer picture of how NHS access works, our guide to weight loss injections on the NHS sets out the eligibility phases in plain language.

What the legal route actually requires — GP or otherwise

Any legitimate supply of Mounjaro or Wegovy requires a valid prescription issued after a genuine clinical assessment. That applies equally to NHS GP prescribing and to private online pharmacies. The Human Medicines Regulations 2012 are unambiguous on this point. What varies between routes is who conducts the assessment, how quickly, and what the eligibility bar is.

Through a private regulated pharmacy like nume, the eligibility criteria follow the medicines' licensed indications: adults aged 18 or over with a BMI of 30 or above, or a BMI of 27 or above alongside at least one weight-related health condition such as prediabetes, hypertension or high cholesterol. Lower BMI thresholds may apply for certain ethnic backgrounds under UK guidance. A BMI figure alone doesn't determine the outcome, the prescriber considers your full health picture, including any contraindications, current medicines and medical history.

You can read about the broader range of weight loss injections available in the UK to understand where these treatments sit within the landscape before deciding which route suits you.

How to get weight loss injections from a GP the private route: nume's process step by step

Starting with nume is the kind of process that strips out the parts that don't need to exist. Fill in a free clinical consultation online, your medical history, current medicines, weight, relevant conditions. A GPhC-registered Independent Prescriber at our pharmacy reviews everything that same day. They may ask follow-up questions; if treatment is appropriate, a prescription is issued. There's no algorithm making that call. Our clinical approach is explained in more detail on our clinical team page.

Once approved, orders placed before 12pm on a weekday are dispatched the same day. A DPD tracking notification arrives on your phone; the following morning, a plain cardboard box lands on your doorstep. Inside is your pen, your Patient Information Leaflet, and instructions for getting in touch if you have questions. Aftercare is available seven days a week. There's no subscription. Every repeat order goes through a fresh clinical review before anything is sent.

If you want to explore all the treatment options before starting, the weight loss treatments page gives a full picture of what's available through nume.

Checking any online pharmacy is genuine (and why it matters

The MHRA has issued repeated public warnings about counterfeit weight loss pens sold via social media and unregistered websites) some containing insulin instead of the medicine on the label. In 2025 alone, enforcement operations seized approximately 20 million doses of illegally traded weight loss medicines, worth around £45 million, and the first UK site manufacturing fake tirzepatide pens was raided. These are not edge cases. If you want to understand how to get the weight loss injection through a safe and regulated route, verifying the pharmacy on the GPhC register before handing over any personal or payment details is the single most important step you can take.

Every legitimate online pharmacy operating in the UK must be registered with the General Pharmaceutical Council. You can check any pharmacy's registration (including ours) directly at the GPhC register (registration number 9012878). Takes thirty seconds. Red flags to walk away from: any seller offering these medicines without requiring a prescription, prices that seem implausibly low, discount codes tied to the medicine itself, or supply via direct message on social media, and if you're ready to move forward through a verified provider, you can purchase weight loss injections safely through a regulated pharmacy like nume. Suspect sellers can be reported at the MHRA's Yellow Card scheme, which also accepts reports of suspected side effects.

Our guide to getting weight loss injections from a pharmacy explains what a legitimate supply chain looks like and what questions to ask before you commit to any provider, and if you want to compare the GP route with private options, our separate guide on how to get weight loss injections from a doctor walks through what each pathway involves.