Buy Weight Loss Injections in the UK (October 2026)

01 · Getting started

How to get weight loss injections in the UK

The only legal route is a prescription. Weight loss injections are prescription-only medicines, so a registered prescriber has to review your BMI, medical history and current medicines first. If you are weighing up ordering online, the process is the same as a clinic visit: a questionnaire, a clinical decision, then dispensing by a registered pharmacy.

At EverydayMeds the first step is a free online consultation. It is a short health questionnaire with no charge and no obligation. A GPhC-registered prescriber reviews it, not a scoring script. Payment is taken when you place the order; if the prescriber decides the treatment is not suitable, the order is refunded automatically in full.

The injection we dispense is Mounjaro (tirzepatide), supplied through official LillyDirect supply direct from Eli Lilly's UK distribution. All six doses from 2.5mg to 15mg are in stock. You can see live pricing on the Mounjaro pen page, and our Mounjaro ordering guide goes deeper on each dose.

02 · Costs

What weight loss injections cost

A 2.5mg starter pen costs £169.99 at the standard price, and it lasts four weekly doses. New customers get £40 off their first order at any dose with code FIRST40, which brings the first 2.5mg pen to £129.99. Switching to us at a higher dose? Your first 15mg order is £259.99. Every later order is £25 off the standard price (code DOSE25).

Across the UK pharmacies we track (checked 25 October 2026), the 2.5mg starting pen ranges from £143.96 to £179.99, and the gap between providers for the same dose runs from £20 to £36.03. Our consultation is free, the price shown is the price paid, and there are no hidden fees. Payment is by Visa, Mastercard or Klarna, with pay-monthly options and no subscription.

These totals are at standard prices. A new customer's first order is £40 less, and every later order is £25 less. Your actual maintenance dose is a prescriber decision, so your own total may fall between these figures. If you settle at 7.5mg, 10mg or 12.5mg, the monthly pen prices are £244.99, £274.99 and £289.99.

03 · Our service

What is included when you order from us

Delivery is free, next-day and tracked with DPD, in temperature-controlled, discreet packaging. Orders placed by 3pm are dispatched the same day. Saturday delivery is £14.99. Needles, a sharps bin and injection guidance come with every order.

Ongoing monthly reviews, dose-titration and follow-up assessments by the prescribing team are part of the service, with side-effect support. Support runs Monday to Friday, 9am to 5pm, on 0333 207 0413 or support@everydaymeds.co.uk. Repeat orders re-check suitability, and nothing ships automatically. Over 100,000 customers have been supported on their weight loss journey, and our GLPTrackr companion app is free for tracking yours. You can also browse all weight loss treatments.

04 · Ordering

How ordering works in four steps

Ordering takes four stages. First, complete the free online consultation, which a GPhC-registered prescriber reviews. Second, payment is taken when you place the order; if the prescriber decides the treatment is not suitable, the order is refunded automatically in full. Third, our registered pharmacy dispenses the pen, with same-day dispatch when you order by 3pm. Fourth, your pen arrives by free next-day tracked delivery. If the consultation is declined you are refunded in full, automatically, and refunds take 5 to 10 working days.

05 · What the injections are

What weight loss injections actually are

Weight loss injections are prescription medicines that act on gut hormones to help control appetite. The one we dispense is Mounjaro, the brand name for tirzepatide, a once-weekly injectable made by Eli Lilly. In the UK it is licensed for weight management in adults and for type 2 diabetes. It comes as a pre-filled multi-dose KwikPen in six strengths: 2.5mg, 5mg, 7.5mg, 10mg, 12.5mg and 15mg.¹

Tirzepatide is the first treatment of its kind to activate two natural gut-hormone receptors at once, GIP and GLP-1. Together these help regulate appetite, slow how quickly the stomach empties and improve how the body responds to insulin. In practice, most people feel fuller sooner and less hungry between meals, which supports a reduced-calorie diet. This dual action distinguishes it from single-action GLP-1 medicines such as semaglutide.¹

Other injectables exist, and the prescriber decides which suits a person. Wegovy (semaglutide) is a once-weekly pen with doses of 0.25mg, 0.5mg, 1mg, 1.7mg and 2.4mg. It steps up after at least 4 weeks and reaches the 2.4mg maintenance dose from week 17.¹⁸ Liraglutide, sold as Saxenda and in products such as Erly, is supplied at 6mg per millilitre. It is a daily injection, unlike the once-weekly Mounjaro and Wegovy.

The injection is given under the skin once a week on the same day, at any time of day, with or without food. Licensed sites are the stomach area at least 5cm from the belly button, the front of the thigh, or the back of the upper arm if someone else gives the injection. You rotate the site with each dose, and each KwikPen holds four weekly doses.¹

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

Treatment is used alongside a reduced-calorie diet and increased physical activity, not instead of them. If you want to compare approaches by safety profile before you decide, our guide to the healthiest weight loss injections sets out the questions worth asking a prescriber. Supplements marketed with nicknames such as "nature's Ozempic" are low-cost products with no clinical oversight, and they are not licensed weight loss injections or equivalent medicines.

06 · Who can get them

Who can get weight loss injections

Mounjaro is licensed for adults with a BMI of 30 or above, or a BMI between 27 and 30 with at least one weight-related condition. Qualifying conditions include high blood pressure, high cholesterol, obstructive sleep apnoea, cardiovascular disease, prediabetes and type 2 diabetes. It must be used alongside a reduced-calorie diet and increased physical activity.¹

Meeting the BMI threshold does not mean the prescriber will say yes. 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. Be accurate about your height, weight, conditions and every medicine you take, including insulin or sulfonylureas, because some combinations need dose adjustments and monitoring.

If you take insulin or a sulfonylurea alongside Mounjaro, you should watch for low blood sugar, which shows as shakiness, sweating or confusion. Your prescriber may need to adjust those medicines.¹³ Tell the consultation team about these medicines at the start so the plan accounts for them.

Oral contraceptive pills are another thing to mention. 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. Mounjaro slows stomach emptying, which can reduce how well the pill is absorbed. The advice is to 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. This applies to the pill only: implants, coils and injections are unaffected.⁷

Anyone who does not meet the licensed criteria, or whom the prescriber judges unsuitable, will not be supplied, and the order is refunded automatically. The prescriber can also explain other routes if injections are not right for you. If you are exploring what a GP or specialist service can offer, read how to be referred for these treatments through the NHS.

There is no shortcut around this assessment. A service that offers to supply without a consultation or prescription is not operating legally.

07 · NHS or private

NHS or private prescription: the honest picture

Mounjaro is available on the NHS, 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 people with a BMI of 40 or more and four or more qualifying conditions.⁴⁶ Full rollout is expected to take years.

That phasing is why many people who meet the licensed criteria choose regulated private treatment rather than waiting. A private prescription is a legitimate route when the prescriber is registered and the pharmacy is on the GPhC register. It is not a lesser one, and the medicine is the same.

The practical differences are mostly about timing and cost. On the NHS route, your GP or a specialist service decides based on the national criteria, and in England you pay the standard prescription charge of £9.90 per item where it applies. Privately, a prescriber reviews you against the licence, and you pay the pharmacy price for each pen.

Some people start privately and later move to NHS care when they qualify, and others stay private throughout. Either way, tell your GP what you are taking so your records are complete.

If you are not sure where you stand, ask your GP whether you currently meet the NHS criteria. NHS access to Wegovy runs through specialist weight-management services, so ask your GP about that too. Asking costs nothing, and it gives you a clear comparison before you commit to a private prescription.

If you decide on the private route, the key tests are the same as for any prescription medicine. Check the pharmacy's GPhC registration, expect a real consultation, and walk away from anyone who skips one. Our registration number is 9012878, and you can verify it on the GPhC register.

08 · Planning the cost

Planning the cost of treatment over a year

Treatment cost depends on how far up the dose ladder you go. Everyone starts Mounjaro on 2.5mg once a week. This starting dose is about letting your body adjust, not about weight loss itself. After at least 4 weeks the dose increases to 5mg, and it can then step up by 2.5mg at a minimum of 4-week intervals (7.5mg, 10mg, 12.5mg) to a maximum of 15mg weekly, depending on how you respond and tolerate it.¹

Many people settle at a maintenance dose of 5mg, 10mg or 15mg. Higher is not automatically better, and your prescriber guides the right pace. Because the pen price rises with the dose, your first year depends on where you settle. If you step up after 4 weeks on each dose, your first four pens (2.5mg to 10mg) cost £879.96 at standard prices. A first year costs £2,399.88 if you stay on 5mg after your 2.5mg starting pen, up to £3,279.88 if you step up through every dose to 15mg.

Those are standard prices before discounts. A new customer's first order is £40 less with code FIRST40, and each later order is £25 less. Prices were last checked 25 October 2026. If you want a specific number to plan around, our 5mg Mounjaro pen guide covers the dose many people settle at.

Pay-monthly options and Klarna spread the cost, and there is no subscription to cancel. You choose each reorder, and each one re-checks your suitability.

09 · Side effects and safety

Side effects and when to seek help

Most side effects are digestive and settle with time. The most common, affecting more than 1 in 10 people, are nausea, diarrhoea, vomiting, constipation and abdominal discomfort. Common effects, up to 1 in 10 people, include indigestion, reduced appetite, dizziness, reflux, burping, hair shedding and injection-site reactions. They are most likely when starting treatment or moving up a dose, and for most people they ease within days to a few weeks as the body adjusts.¹³

Serious side effects are uncommon but need urgent attention. Seek immediate medical help for any of these:¹³

• 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 the skin or eyes (possible gallbladder problems);
• signs of a severe allergic reaction, such as swelling of the face or throat and difficulty breathing.

If you take insulin or a sulfonylurea, watch for low blood sugar (shakiness, sweating, confusion). Your prescriber may need to adjust those medicines.¹³

Mounjaro can reduce how well oral contraceptive pills are absorbed because it slows stomach emptying. Switch to a non-oral method, or add a barrier method such as condoms, for 4 weeks after starting and for 4 weeks after each dose increase. Implants, coils and injections are unaffected.⁷

If you miss a dose, take it as soon as you can within 4 days (96 hours) of the scheduled time, then carry on with your usual day. If more than 4 days have passed, skip it and take the next dose on your normal day. Never take two doses within 3 days of each other.¹ You can change your weekly injection day as long as at least 3 days (72 hours) have passed since your last dose.¹

Our prescribing team offers side-effect support during your monthly reviews. You can also report a suspected side effect to the MHRA through the Yellow Card scheme.¹⁹

10 · Fakes and safe suppliers

How to avoid fake weight loss injections

The MHRA has seized thousands of fake weight-loss pens in the UK and has issued alerts after falsified Mounjaro pens were identified. Fake pens have caused hospitalisations, and some contained insulin rather than tirzepatide.⁷

Only buy from a pharmacy you can verify on the GPhC register, never from social media, beauty salons or unverified websites.¹² Genuine treatment always involves a prescription and a clinical consultation. A seller offering to supply without a consultation or prescription is a warning sign on its own. Our GPhC registration number is 9012878, and you can look it up on the register yourself.

Genuine UK stock is supplied through Lilly's official distribution to licensed pharmacies. Every pen carries a batch number and expiry date that can be checked. Ours comes through official LillyDirect supply, direct from Eli Lilly's UK distribution.¹

When your pen arrives, check it. A genuine UK Mounjaro pen comes from a registered pharmacy with a batch number and expiry date, arrives cold-chain packaged, and the solution inside is clear and colourless. Do not use a pen that has been frozen, looks cloudy or discoloured, has particles in it, is past its expiry, or has been above 30°C or out of the fridge for more than 30 days in use. If supply or packaging ever seems wrong, check the pharmacy on the GPhC register and contact the pharmacy before injecting.¹

Price alone is not a reliable test, but an offer far outside the normal range for a prescription-only medicine deserves scrutiny. Ask who the prescriber is, where the pharmacy is registered, and whether the batch number can be traced. If the seller dodges these questions, do not buy.

The same question comes up often in a different form: can you buy these injections over the counter? You cannot. Our guide on whether you can buy them over the counter explains why, and our page on buying online in the UK shows what a legitimate online service looks like.

11 · Realistic results

What results to expect

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. People on lifestyle changes alone lost 3.1%.² These are trial averages, and individual results vary. Treatment works alongside a reduced-calorie diet and increased physical activity, not instead of them.

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%.² As a worked example, for someone starting at 100 kg, 20.9% is about 21 kg. Trial averages do not predict your own result.

Weight loss on Mounjaro is gradual by design. The first weeks on 2.5mg are an adjustment phase and losses are usually modest. Most measurable progress builds from 5mg onward, month by month. Trials measured results at 72 weeks, so think in months, not days, and judge progress by trend rather than individual weigh-ins.¹

Experiences in the first weeks differ widely. Some people notice an appetite change and early loss in week one, while others feel little until a higher dose, and both are normal. Early loss includes water weight. Mild nausea, altered appetite and tiredness in the first days after each injection are the commonest early effects and usually settle.¹

Your response is reviewed by your prescriber. 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 That review is built into our monthly clinical reviews.

Plan for the long term as well. Stopping should always be planned with your prescriber, with diet and activity habits ready to carry the load. Individual results vary, and this page is information, not a substitute for medical advice.

12 · Using and storing your pen

Using, storing and travelling with your pen

Keep Mounjaro pens in a fridge at 2 to 8°C and never freeze them. Once a pen is in use, it can be kept out of the fridge not above 30°C for up to 30 days, which is useful for short trips, after which it should be discarded. Keep the cap on to protect the pen from light, and never use a pen that has been frozen.¹

Unopened pens belong in the fridge and keep until the expiry date printed on the box. If an unopened pen has been out of the fridge, check with the pharmacy before using it rather than relying on a remembered day limit, because figures circulating online often come from other countries' labels.¹

You set the dose by turning the dose knob until the correct dose shows in the window.

There is no best time of day to inject. Mounjaro works the same morning or evening, with or without food, and what matters is the same day each week. Many people choose a weekend morning so early side effects fall on days off.¹

You can fly with Mounjaro. Carry pens in hand luggage, because hold luggage can fall below freezing, ideally in a cool bag with the prescription label or a copy of your prescription. In-use pens tolerate up to 30 days not above 30°C, so most holidays need no special arrangements. For hot climates use an insulated pouch, and check destination rules for travelling with prescription injectables before you fly.¹

Needles, a sharps bin and written injection guidance arrive with every order. Read the patient information leaflet in the box before your first dose, and contact our support team if anything is unclear. If you live in a particular area and want a local overview, see our pages for Hampshire and Northampton; delivery is the same wherever you are.

Mounjaro (tirzepatide) is a prescription-only medicine, supplied only after an online consultation reviewed by a GPhC-registered prescriber. It is used alongside a reduced-calorie diet and increased physical activity. Individual results vary.