Weight Loss Injection Programs in the UK (October 2026)

01 · The core answer

What a weight loss injection program includes

A sound program has four parts: a licensed medicine, a prescriber review, a titration plan and follow-up. Marketing pages often add "lifestyle support", but the injection is licensed for use alongside a reduced-calorie diet and increased physical activity, not instead of them.¹

For a wider look at structured plans, see our guide to medical weight loss programs and our overview of what a GLP-1 program involves.

02 · Your decision

Is a program right for you, and what next?

A program suits adults with a weight-management need who are ready for gradual change. Whether it is safe for you is a prescriber's decision, based on your health history and current medicines. If you already know you want Mounjaro, you can see the Mounjaro pen prices and consultation. If you are still comparing, our online GLP-1 program comparison is a sensible next read.

Related guides: Retinal weight loss injection and Injection fir weight loss.

03 · Mounjaro in a program

How Mounjaro works inside a program

Mounjaro is the brand name for tirzepatide, a once-weekly injectable prescription medicine made by Eli Lilly.¹ It activates the GIP and GLP-1 receptors, which helps most people feel fuller sooner and less hungry between meals.¹

In the SURMOUNT-1 trial of 2,539 adults, people taking tirzepatide alongside diet and exercise lost on average 15% of their body weight on 5mg, 19.5% on 10mg and 20.9% on 15mg over 72 weeks, compared with 3.1% with lifestyle changes alone. These are trial averages, and individual results vary.²

04 · Dose steps and pace

Dose steps and realistic pace

Everyone starts Mounjaro on 2.5mg once a week. The dose then rises in steps, and many people settle at a maintenance dose of 5mg, 10mg or 15mg, because higher is not automatically better.¹

Weight loss on Mounjaro is gradual by design. Trials measured results at 72 weeks — think in months, not days, and judge progress by trend, not individual weigh-ins.¹ If you have lost less than 5% of your starting weight after 6 months on the highest dose you can tolerate, your prescriber will discuss whether continuing or stopping is right for you.¹

05 · NHS or private

NHS or private program?

Mounjaro is available on the NHS, but access is being phased in over several years.⁶ NICE recommends it for adults with a BMI of at least 35 plus at least one weight-related condition, and the NHS primary-care rollout began in June 2025 with the highest-need groups first (initially BMI 40+ with four or more qualifying conditions).⁴

Full rollout is expected to take years, which is why many people who meet the licensed criteria choose regulated private treatment rather than waiting. Our weight loss clinic page explains the private route.

06 · Spotting a poor program

How to spot a poor program

Be wary of anyone offering to supply without a consultation or prescription, or promising specific results. Dramatic weight-loss claims are a warning sign. Check the pharmacy on the GPhC register; ours is GPhC 9012878.¹² Counterfeit injectables are a known risk, and suspected fake products or side effects can be reported through the Yellow Card scheme.⁷

Supplements sold as "natural" alternatives are low-cost products with no clinical oversight, and they are not equivalent to the licensed medicines. For a view on safety across options, see healthiest weight loss injections.

07 · How we run ours

How our program works

• Free online consultation, reviewed by a GPhC-registered prescriber. Payment is taken when you place the order; if the prescriber decides the treatment is not suitable, the order is refunded automatically in full.
• Official LillyDirect supply of genuine KwikPens, with all six doses in stock.
• Free next-day tracked delivery in temperature-controlled packaging, with same-day dispatch when ordered by 3pm.
• Ongoing monthly reviews, side-effect support and the free GLPTrackr app. Serious side effects are uncommon but need urgent attention. Seek immediate medical help for severe, persistent stomach pain that may spread to your back, with or without vomiting (possible pancreatitis); pain in the upper right abdomen, fever or yellowing of skin/eyes (possible gallbladder problems); or signs of a severe allergic reaction such as swelling of the face or throat and difficulty breathing. Repeat orders re-check suitability, and there are no subscriptions.

New customers save £40 on their first order with code FIRST40, and an automatic £25 reorder discount applies to every future order (code DOSE25).