Which Appetite Suppressant Is Best on the NHS in the UK? (October 2026)

01 · The core answer

Which appetite suppressant is available on the NHS?

No licensed medicine is best for everyone; the main options are prescription medicines, and the NHS offers them only under clinical criteria. 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

Wegovy access on the NHS runs through specialist weight-management services; ask your GP. Saxenda, a liraglutide product, is a daily injection rather than a weekly one. Orlistat is another prescribed option; your prescriber can advise.

02 · Your decision

Is this relevant to you, and what should you do next?

Start by checking whether you meet the criteria. Mounjaro is licensed for weight management in adults with a BMI of 30 or above, or a BMI between 27 and 30 with at least one weight-related condition such as high blood pressure, high cholesterol, obstructive sleep apnoea, cardiovascular disease, prediabetes or type 2 diabetes.¹ It must be used alongside a reduced-calorie diet and increased physical activity.

If you meet the NHS criteria, ask your GP about local pathways. If you do not yet, or you would rather not wait, our weight loss clinic offers a free online consultation reviewed by a GPhC-registered prescriber. The Mounjaro pen starts at £169.99 per month for the 2.5mg strength; new customers save £40 on their first order with code FIRST40, and an automatic £25 reorder discount applies to every future order (code DOSE25).

03 · How prescription suppressants work

How prescription appetite suppressants work

Mounjaro is the brand name for tirzepatide, a once-weekly injectable prescription medicine made by Eli Lilly. In the UK it is licensed for weight management in adults and for type 2 diabetes.¹

Tirzepatide is the first treatment of its kind to activate two natural gut-hormone receptors at once: GIP and GLP-1.² Together these help regulate appetite, slow how quickly the stomach empties, and improve the way the body responds to insulin. In practice, most people feel fuller sooner and less hungry between meals, which supports a reduced-calorie diet.

Wegovy works on a single receptor and is also a weekly injection. Liraglutide, in Saxenda and similar products, is supplied at 6mg/ml and is a daily injection, unlike once-weekly Mounjaro and Wegovy.

The medicines are not interchangeable shortcuts. They are prescribed, reviewed and adjusted over time, and weight-loss figures from trials, such as SURMOUNT-1 over 72 weeks, are averages. Trial averages do not predict your own result, and individual results vary.²

04 · Over-the-counter and natural options

Over-the-counter and natural appetite suppressants

Over-the-counter appetite suppressants are not licensed weight-management medicines and have no comparable trial evidence. Cheap does not mean tested.

Products marketed as "nature's Ozempic" or as a way to mimic Ozempic naturally deserve particular caution. They do not contain the medicine, they do not act on the same receptors, and dramatic weight-loss claims on their packaging are not a sign of clinical proof. Dosing is not standardised, and nobody reviews your medical history or your other medicines before you buy.

If you want to compare, our guides to a thermogenic appetite suppressant, the best hoodia appetite suppressant, appetite suppressant chews and appetite suppressant candy explain what each category can and cannot do.

Medicines in development are not licensed for use in the UK, so a prescriber cannot supply them.

05 · NHS access in practice

NHS access in practice

NHS access depends on where you live, your BMI and your health conditions. The rollout is deliberately staged, so a neighbour may be offered treatment while you are told to wait. Full rollout is expected to take years, which is why many people who meet the licensed criteria choose regulated private treatment rather than waiting.⁶

Ask your GP practice whether you fall within the current group, and what support they offer in the meantime, such as dietitian advice or a local weight-management service.

Wanting to lose weight quickly is understandable, but there is no safe fast-track. Prescribers aim for steady, supervised progress alongside diet and activity changes. Any plan promising a very large loss in a few weeks should be treated with suspicion, and a prescriber can set realistic expectations for you.

06 · Safety and who should not take it

Safety and who should not take these medicines

Mounjaro is not suitable for everyone. You should not take it if you are allergic to tirzepatide or any of its ingredients, and it should not be used during pregnancy or while trying to conceive.¹ Mounjaro must not be used during pregnancy, and it should be stopped at least one month before trying to conceive. If you become pregnant during treatment, stop the medicine and tell your prescriber promptly. Your prescriber will take extra care, or may recommend against treatment, if you have a history of pancreatitis, severe gut or digestive disease, diabetic retinopathy, or gallbladder problems. Always share your full medical history and medicine list during consultation.

In rodent studies tirzepatide caused thyroid C-cell tumours; it is not known whether this applies to humans, and no increase has been shown in human trials.¹ As a precaution, tell your prescriber if you or a close relative have had medullary thyroid cancer or the inherited condition MEN 2.

If you notice a new symptom after starting any medicine, discuss it with your prescriber and report it through the Yellow Card scheme.¹⁹ 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. Mounjaro (tirzepatide) is a prescription-only medicine, supplied only after an online consultation reviewed by a GPhC-registered prescriber. Individual results vary. This page is information, not a substitute for medical advice.