Weight Loss Injections in Leeds: How They Work and How to Get Them Safely

Step 1, Work out which route is realistic for you

People in Leeds can access weight-loss injections through their GP or a specialist NHS weight management service, or privately through a GPhC-registered pharmacy. The NHS route is free, but the eligibility bar is high and rising gradually. As of June 2025, Mounjaro on the NHS in England requires a BMI of 40 or above alongside four or more qualifying conditions (high blood pressure, dyslipidaemia, obstructive sleep apnoea, cardiovascular disease or type 2 diabetes). A second cohort (BMI 35–39.9 with four or more of those same conditions) became eligible in June 2026. Waiting lists for both NHS routes vary significantly by area, and not every GP practice in Leeds is participating yet: the contract change that lets GPs prescribe is optional.

Private treatment has a lower threshold. The licensed criteria for Mounjaro and Wegovy cover adults with a BMI of 30 or above, or 27 or above with at least one weight-related condition such as prediabetes, hypertension or high cholesterol. A lower BMI threshold of 2.5 kg/m² applies for some ethnic backgrounds under UK guidance. Critically, meeting the numbers on paper does not guarantee a prescription, a prescriber still needs to assess the full picture. See how GP-prescribed weight loss injections compare to the private route if you want a fuller breakdown.

Worth doing right now: open the NHS BMI calculator and note your figure. It takes under a minute and it's the first thing any prescriber will check.

Step 2, Choose your medicine and understand what it does

Two injections hold a UK licence for weight management, and if you want a quick overview before going deeper, our guide covering 3 weight loss injections available in the UK is a useful starting point. Mounjaro (tirzepatide), made by Eli Lilly, is a dual GIP and GLP-1 receptor agonist, the only weight-loss medicine in the UK that activates both gut-hormone pathways simultaneously. It comes as a KwikPen in six strengths from 2.5 mg up to 15 mg, each pen containing four weekly doses. Treatment starts at 2.5 mg; the early dose is there to let your body adjust, not to produce rapid results. Wegovy (semaglutide), made by Novo Nordisk, works on the GLP-1 pathway alone and is taken once weekly, escalating from 0.25 mg to a standard maintenance dose of 2.4 mg, with a 7.2 mg option now also approved by the MHRA.

Both slow gastric emptying and reduce appetite. Both are taken as a subcutaneous injection into the abdomen, thigh or upper arm, rotating the site each week. The clinical trial results are substantial: in SURMOUNT-1, tirzepatide at 15 mg produced an average body-weight reduction of around 20–21% over 72 weeks in adults with obesity; the STEP 1 trial recorded roughly 15% average loss for semaglutide 2.4 mg over 68 weeks. These are averages from trials, not individual guarantees. Both figures are published in the New England Journal of Medicine. Read a fuller comparison of the available options if you're still deciding between them.

Step 3, Understand the safety profile before you start

The most commonly reported side effects are gastrointestinal: nausea, loose stools, constipation, bloating and indigestion. They tend to peak in the first week or two after a dose increase and ease off as your body adjusts. Injection-site reactions, fatigue and headaches are also reported. Most people tolerate the medicines well once past the early weeks, but some find the GI effects more persistent.

Serious but uncommon effects include acute pancreatitis. In January 2026 the MHRA issued a Drug Safety Update on GLP-1 medicines specifically highlighting this risk: if you develop severe stomach pain that radiates towards the back, with or without vomiting, seek urgent medical attention. The MHRA's Yellow Card scheme is the right place to report anything unexpected.

These medicines are not licensed for use in pregnancy, while breastfeeding, or if you are trying to conceive. Women taking an oral contraceptive pill alongside tirzepatide should use an additional non-oral method of contraception for the first four weeks of treatment and for four weeks after each dose increase, because stomach-emptying changes may affect pill absorption. Under-18s are not eligible. Anyone with a history of medullary thyroid carcinoma or pancreatitis should discuss this directly with a prescriber before going any further. There's more on what to expect during treatment for those already in the process.

Step 4, Getting a prescription through a regulated pharmacy

If the NHS route does not apply to you yet, or the waiting time is a problem, a private prescription from a GPhC-registered online pharmacy is the legally correct alternative. Any pharmacy dispensing these medicines must hold a GPhC registration, you can check this in under a minute at the GPhC register. If a seller cannot give you a registration number that resolves there, walk away.

Avoid anything marketed without a prescription requirement, sold via social media, or priced dramatically below the market range. The MHRA has seized large quantities of fake weight-loss pens in recent enforcement operations, including counterfeit tirzepatide made at an illegal UK site; counterfeit pens have contained the wrong substances entirely. The cost of genuine private treatment varies by dose and provider; a broad overview of pricing across the market is on our weight loss injection cost page.

At nume, your consultation is reviewed the same day by a named GPhC-registered Independent Prescriber, a real clinician, not automated software. If you're clinically suitable and order before 12 pm, your treatment is dispatched the same day and arrives the next working day via tracked DPD in plain packaging. One transparent price covers everything: the consultation, prescription, medicine and delivery. Read more about how we work if you want the full picture before starting. When you're ready, start your free consultation and a prescriber will take it from there.