Appetite Suppressants UK: What Actually Works (October 2026)

01 · The verdict

How do appetite suppressants compare?

Mounjaro is a prescription medicine, not a pill you pick off a shelf, and it has published, peer-reviewed results in adults with overweight or obesity.² In SURMOUNT-1, 2,539 adults 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 treatment works alongside a reduced-calorie diet and more physical activity, not instead of them.²

That does not make it right for everyone. It is licensed for specific adults, a prescriber has to decide it is suitable, and it is a weekly injection. If you want a wider look at the field, our guide to a great appetite suppressant covers how to judge any product, and top rated appetite suppressant options compares the categories.

02 · Cost

What a prescription appetite suppressant costs

A Mounjaro starter pen is a four-week supply. Your first 2.5mg pen costs £129.99 with code FIRST40, against a standard price of £169.99. The Mounjaro pen is offered in six strengths, and all six doses are in stock.

Every later order gets an automatic £25 off the standard price (code DOSE25).

The consultation is free and the price shown is the price paid, with no hidden fees. Payment is taken when you place the order; if the prescriber decides the treatment is not suitable, the order is refunded automatically in full.

03 · Getting started

How to get a licensed appetite suppressant from us

Ordering takes three steps and starts with a free online consultation, not a payment.

• Free consultation: a short health questionnaire, no charge and no obligation.
• Prescriber review: a GPhC-registered prescriber reviews your answers, not a scoring script. Unsuitable orders are refunded automatically.
• Dispatch and delivery: your medicine is dispensed by our registered pharmacy, with same-day dispatch when ordered by 3pm and free next-day tracked delivery in discreet, temperature-controlled packaging. Saturday delivery is £14.99.

Ready to see whether you qualify? Start your free consultation, or browse all weight loss treatments. Our supply comes through official LillyDirect, direct from Eli Lilly's UK distribution, and ongoing monthly clinical reviews are included.

04 · What counts as one

What counts as an appetite suppressant?

An appetite suppressant is anything taken to make you feel less hungry or fuller sooner, and the label covers products that are extremely different from each other. At one end are supplements, shakes, fibre products and herbal extracts that you can buy without anyone asking about your health. At the other are licensed prescription medicines that went through formal trials and a regulator's assessment before they could be prescribed.

That difference matters more than any ranking of brands. A "top 5 best appetite suppressant" list on a retailer's site usually ranks products by commercial criteria, reviews or marketing, rather than by comparable trial data. Lists tagged with a year, such as 2018, 2019, 2023 or 2024, tend to be rewritten each cycle with new names and similar promises.

What you can ask of any product is simple. Is it a licensed medicine or a supplement? Who reviews your suitability before you take it? Does anyone follow up on how you are getting on? What happens if you have a side effect, and does a pharmacist or prescriber know what else you are taking? Over-the-counter products usually leave you to answer these alone. A prescription route answers them by design, because a GPhC-registered prescriber reviews your health information first.

Appetite is also not the only lever. Mounjaro, for instance, is licensed for use alongside a reduced-calorie diet and increased physical activity, so it is part of a plan rather than a standalone fix.¹ If you want to see how we think about the whole category, the page on the opposite of an appetite suppressant looks at what drives hunger up, which is useful context when you choose between approaches.

05 · How Mounjaro curbs appetite

How Mounjaro reduces appetite

Mounjaro contains tirzepatide, which activates two natural gut-hormone receptors at once: GIP and GLP-1. Together these help regulate appetite, slow how quickly the stomach empties and improve the way the body responds to insulin.¹ In practice, most people feel fuller sooner and less hungry between meals, which supports a reduced-calorie diet.

The medicine works with gut-hormone receptors your body already uses to regulate appetite. That dual action is what distinguishes Mounjaro from single-action GLP-1 medicines such as semaglutide (Wegovy and Ozempic).¹

Mounjaro is the brand name for tirzepatide, made by Eli Lilly. It is a once-weekly injectable prescription medicine licensed in the UK for weight management in adults and for type 2 diabetes. It comes as a pre-filled multi-dose pen (KwikPen) in six strengths: 2.5mg, 5mg, 7.5mg, 10mg, 12.5mg and 15mg.¹

Because it is weekly, the day-to-day experience is different from taking pills. You do not need to remember a tablet at each meal; you inject once a week on a consistent day, following the instructions that come with the pen. Needles, a sharps bin and injection guidance are included with every order.

The half-life of tirzepatide is about five days. After a final dose it takes roughly 4–5 weeks to clear the system, there is no way to speed this up, and nothing needs doing while it clears.¹

None of this means the medicine does the work alone. Reduced hunger is a tool that makes eating less feel more manageable, and the licence expects it to be used with a reduced-calorie diet and more activity. Your prescriber will talk you through how the dose rises over time, because treatment starts at 2.5mg and moves up in steps rather than starting at the strength that produced the headline trial results.

06 · What the trials show

What the trial evidence shows

The main trial behind Mounjaro for weight management is SURMOUNT-1. In 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.²

These are trial averages. Individual results vary, and they do not predict your own result. Treatment works alongside a reduced-calorie diet and increased physical activity, not instead of them.²

The same trial reports how many people reached certain thresholds. At 72 weeks, 85% of participants on 5mg, 89% on 10mg and 91% on 15mg had lost at least 5% of their body weight. Half of participants on 10mg and 57% on 15mg lost at least 20% of their body weight.²

To make the percentages concrete, here is a worked example. For someone starting at 100 kg, 20.9% is about 21 kg, and 15% is about 15 kg. Those are straight arithmetic on the trial averages, not a forecast.

A prescriber can set a realistic plan around your starting point, dose and health.

Finally, staying on treatment matters to outcomes. The SURMOUNT-4 trial looked at continued tirzepatide for maintenance of weight reduction, which is one reason your prescribing team reviews you monthly rather than handing over a one-off supply.¹⁴

07 · Supplements and natural options

Supplements, shakes and "natural" appetite suppressants

Supplements, shakes and herbal products are easy to buy, and that ease is the main thing in their favour. They are available cheaply without assessment, which is also their biggest limitation: nobody reviews whether they suit you, and nobody follows up. Dosing is not standardised between products.

You will see names such as berberine, "nature's Ozempic" and the "poor man's Ozempic" used in marketing. These are phrases borrowed from prescription medicines to sell something different. Where sellers make dramatic weight-loss claims, treat them with caution and ask whether any regulator-reviewed evidence stands behind the wording.

The question "What mimics Ozempic naturally?" deserves a straight answer: nothing sold as a supplement is the same as a prescription GLP-1 medicine. Semaglutide and tirzepatide are licensed medicines made to a defined specification. A supplement with a catchy name is a different product with a different regulatory status, and it should not be described as equivalent.

Shakes and meal-replacement products are a different case again. They work, if at all, by replacing meals or adding fullness through food, and that is a dietary approach rather than a medicine acting on appetite hormones. Our pages on specific ingredients, such as L-phenylalanine as an appetite suppressant and appetite suppressant nootropics, describe what each product is and point to licensed options when you need clinical oversight.

Practical advice if you are considering a supplement anyway: tell your pharmacist or GP what you are taking, especially if you use other medicines, and read the label for what it actually contains. If you notice a new symptom, speak to a healthcare professional. Suspected side effects from any medicine can be reported through the MHRA Yellow Card scheme.⁷

For people on a tighter budget, our appetite suppressant savers guide looks at lower-cost routes. Cheaper is not the same as safer or more effective, though, and cost alone should not decide the choice.

08 · Pills, tablets and injections

Pills, tablets and injections compared

There is no single pill that makes you not want to eat, but some licensed GLP-1 medicines now come as tablets. See our overview of the best prescription appetite suppressant history for background.

Today's licensed options come in three broad formats. Once-weekly injections include Mounjaro and Wegovy. Wegovy's pens run 0.25mg, 0.5mg, 1mg, 1.7mg and 2.4mg once weekly, stepping up after at least 4 weeks and reaching the 2.4mg maintenance dose from week 17; 2.4mg is the licensed maintenance dose for weight management.¹⁸ Liraglutide (Saxenda, and products such as Erly) is supplied at 6mg per millilitre and is a daily injection, unlike once-weekly Mounjaro and Wegovy.

Oral options also exist. Wegovy tablets (oral semaglutide) and Foundayo (orforglipron) are licensed tablets with their own product information.²⁰²¹

So, is there a tablet equivalent to Mounjaro? There are licensed GLP-1 tablets, but they are different medicines with different trial evidence, and none is the same molecule as tirzepatide. Mounjaro itself is an injection. Whether a tablet or an injection suits you is a conversation for a prescriber, who will weigh your health, other medicines and preferences.

When choosing between formats, practical questions often decide it. Do you prefer a weekly injection to a daily routine? Would a tablet's timing rules suit your day? What does your prescriber think is safest for your medical history? None of these has a universal answer.

What the formats share is the need for a proper assessment. A regulated pharmacy asks about your health, current medicines and goals before deciding. A free consultation with us gives you that review without cost or obligation, and the prescriber can discuss alternatives if Mounjaro is not the right fit.

09 · Who qualifies

Who can be prescribed one, and the NHS picture

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. Examples include high blood pressure, high cholesterol, obstructive sleep apnoea, cardiovascular disease, prediabetes or type 2 diabetes. It must be used alongside a reduced-calorie diet and increased physical activity.¹

A prescriber assesses your BMI, medical history and current medicines before deciding whether it is suitable for you.¹¹ That is why the consultation matters. If the prescriber decides treatment is unsuitable, your order is refunded automatically.

On the NHS, Mounjaro is available, but access is being phased in over several years. NICE recommends it for adults with a BMI of at least 35 plus at least one weight-related condition. The NHS primary-care rollout began in June 2025 with the highest-need groups first, initially BMI 40+ with four or more qualifying conditions.⁴⁶ Full rollout is expected to take years, which is why many people who meet the licensed criteria choose regulated private treatment rather than waiting.

If you are not sure which group you fall into, your GP is the right first step for NHS access. Ask what your local service offers and where you sit within the phased approach. Private treatment is an option for people who meet the licence but do not yet qualify for an NHS route, or who would rather not wait.

Eligibility also covers what you take already. Tell the prescriber about every medicine, including supplements. Some combinations call for care. For instance, doses of insulin or sulfonylureas may need adjusting because of the risk of low blood sugar. Being open about this up front helps the prescriber keep you safe.

If your BMI sits just below the licence thresholds, a supplement may seem like the only option, but it is worth asking a clinician what else could suit you. Licensed treatment is for these groups, and a prescriber will explain honestly if you fall outside them.

10 · A year of costs

What a year of treatment costs

Planning the cost of a prescription appetite suppressant means thinking beyond the first pen. If you step up after 4 weeks on each of 2.5mg, 5mg, 7.5mg and 10mg, your first four pens (2.5mg to 10mg) cost £959.96 at standard prices.

Over a first year (52 weeks, 13 pens), the total depends on where you settle. A first year costs £2,711.88 if you stay on 5mg after your 2.5mg starting pen, up to £3,599.88 if you step up through every dose to 15mg. Again, those are standard prices before discounts. For other maintenance doses, use the monthly price: £279.99 at 7.5mg, £290.99 at 10mg and £319.99 at 12.5mg.

The weekly equivalents help with budgeting: £42.50 per week at 2.5mg, £54.75 at 5mg and £82.50 at 15mg, before discounts.

Costs also shift with the market. Pharmacy sell prices vary because of confidential discounts. Our prices are shown live and were last checked 10 October 2026.

Payment options include Visa, Mastercard, Klarna and pay-monthly plans, and there are no subscriptions, so you can pause or stop whenever your prescriber and you agree. Repeat orders re-check suitability, with no auto-shipping.

11 · Safety and buying

Safety, storage and buying from a regulated pharmacy

Safety starts with where your medicine comes from. Counterfeit weight-loss medicines have been the subject of MHRA alerts, and the MHRA also runs the Yellow Card scheme for reporting side effects.⁷¹⁹ Be wary of any seller offering to supply a prescription injection without a consultation or prescription. A GPhC-registered pharmacy has a public register entry you can look up; ours is registration 9012878.

We supply genuine KwikPens through official LillyDirect, direct from Eli Lilly's UK distribution. Delivery is by tracked, temperature-controlled packaging so the pen arrives properly protected.

On storage, keep unopened pens in the fridge until first use; they keep until the printed expiry date. Once in use, a KwikPen can be kept out of the fridge at a temperature not above 30°C for up to 30 days after first use, and must then be thrown away. Do not use a pen that has been above 30°C or frozen. For any other question about unopened pens being out of the fridge, check the patient information leaflet and ask the pharmacy rather than guessing.¹³

Like all medicines, Mounjaro can cause side effects, and most are digestive: the most common, affecting more than 1 in 10 people, are nausea, diarrhoea, vomiting, constipation and abdominal discomfort. If something new appears, contact your prescribing team, and report suspected side effects through Yellow Card.¹⁹ Support is available Monday–Friday 9am–5pm by email at support@everydaymeds.co.uk, in your account portal chat or by phone on 0333 207 0413. Ongoing monthly reviews, dose titration and side-effect support are part of our aftercare.

If you take the oral contraceptive pill, Mounjaro can reduce how well it is absorbed: switch to a non-oral method, or add a barrier method (such as condoms), for 4 weeks after starting Mounjaro and for 4 weeks after each dose increase. Tell your prescriber about every medicine you take. Stopping should always be planned with your prescriber: in SURMOUNT-4, people who stopped tirzepatide after 36 weeks regained on average 14% of body weight over the following year.¹⁴

Our free companion app, GLPTrackr, helps you log your journey on iOS or Android. Mounjaro (tirzepatide) is a prescription-only medicine, supplied only after an online consultation reviewed by a GPhC-registered prescriber, used alongside a reduced-calorie diet and increased physical activity. Individual results vary, and this page is information, not a substitute for medical advice. Browse the Buy Mounjaro page when you are ready.

12 · Serious side effects

Serious side effects: when to get help straight away

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. If you take insulin or a sulfonylurea alongside Mounjaro, watch for low blood sugar (shakiness, sweating, confusion) — your prescriber may need to adjust those medicines.¹