Online Pharmacy Weight Loss Drug UK: Mounjaro Prices and How to Get It (October 2026)

01 · Cost

What a weight loss drug costs from an online pharmacy

The cost depends on which medicine you are prescribed and at what dose. For Mounjaro, the standard price of one Mounjaro pen (four weeks of treatment) is £169.99 at 2.5mg, £218.99 at 5mg, £279.99 at 7.5mg, £290.99 at 10mg, £319.99 at 12.5mg and £329.99 at 15mg. That works out at £42.50 a week at the starting dose and £82.50 a week at the top dose.

A new customer's first order, at any dose, is £40 less with code FIRST40. That includes people switching to us from another provider at a higher dose. After that, every future order gets an automatic £25 off the standard price (code DOSE25). The ongoing monthly cost at any dose is therefore that dose's standard price minus the reorder discount.

To see what the first order looks like at each end of the range: your first 2.5mg pen costs £129.99 (a first-order price, standard price £169.99). Switching at 15mg? Your first order is £289.99. The consultation is free, the price shown is the price paid, and there are no hidden fees. You can pay by Visa, Mastercard or Klarna, or use pay-monthly options, with no subscription lock-in.

It helps to know where that sits in the wider market. Across the UK pharmacies we track (checked 10 October 2026), a Mounjaro pen costs between £143.96 and £339.00 per month depending on dose and provider. The starting 2.5mg pen ranges from £143.96 to £179.99. For the same dose, the gap between providers runs from £27 to £41. Boots' Mounjaro dose prices run from £179.00 to £339.00. Compare like for like: same dose, same month, and check what the price includes.

02 · Compare

Online pharmacy, NHS or over-the-counter: how the routes differ

Not every product sold as a weight loss aid is a medicine, and the route you take decides how much clinical oversight you get.

The supplement row matters. Products marketed as natural alternatives to prescription injections are available cheaply without assessment, but they are not licensed weight management medicines and dosing is not standardised. If a seller offers a prescription medicine without a consultation or prescription, walk away.

03 · Ordering

How ordering works in three steps

Ordering from us takes three steps, and if the prescriber decides the treatment is not suitable, your order is refunded automatically in full.

• Free online consultation. Complete a short health questionnaire. There is no charge and no obligation. Start your free consultation whenever you are ready.
• Prescriber review. A GPhC-registered prescriber reviews your answers; it is a clinical decision, 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.
• Dispensing and delivery. Our registered pharmacy dispenses your pen, with same-day dispatch when ordered by 3pm. Delivery is free, next-day, tracked, discreet and temperature-controlled with DPD. Saturday delivery is £14.99.

Needles, a sharps bin and injection guidance come with every order. Repeat orders re-check suitability and nothing ships automatically, so you stay in control of each pen. Our guide to buying weight loss medication online walks through the process in more detail.

04 · How it works

How do weight loss injections 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 It comes as a pre-filled multi-dose pen, the 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 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.

This dual action is what distinguishes Mounjaro from single-action GLP-1 medicines such as semaglutide, sold as Wegovy and Ozempic.¹ That does not make one right for everyone. The choice depends on your medical history, current medicines, how you tolerate treatment and what you can afford, which is why a prescriber reviews each order.

The medicine does not replace the basics. It is used alongside a reduced-calorie diet and increased physical activity, and the licence is written that way. Think of the pen as a tool that makes it easier to eat less, not as a substitute for changing what and how you eat.

You inject once a week, on the same day each week, using the pen supplied. Treatment starts at the lowest strength, 2.5mg, and your prescriber steps the dose up over time according to how you respond and tolerate it. Because each pen is a four-week supply, you work through the strengths one pen at a time. Our free weight loss treatments overview shows how this fits alongside the other options we offer.

Once a pen is in use, the UK KwikPen is licensed for up to 30 days (not above 30°C) out of the fridge. Before first use, store pens in the fridge. Unopened pens keep until the printed expiry date. For anything beyond that, such as an unopened pen that has been left out, check the patient information leaflet and ask the pharmacy rather than guessing.¹³

If you are weighing an injection against tablets, the main practical difference is frequency and format. Mounjaro and Wegovy are once-weekly injections. Liraglutide, sold as Saxenda and in products such as Erly, is a daily injection supplied at 6mg per millilitre.

05 · Who is eligible

Who can get a weight loss drug online?

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 are high blood pressure, high cholesterol, obstructive sleep apnoea, cardiovascular disease, prediabetes or type 2 diabetes.¹¹¹ It must be used alongside a reduced-calorie diet and increased physical activity.

Meeting a BMI threshold is necessary, not sufficient. A prescriber assesses your BMI, medical history and current medicines before deciding whether the medicine is suitable for you.¹ That is the point of the consultation, and it is why a reputable online pharmacy will never supply a weight loss drug on a tick-box alone.

At EverydayMeds, the consultation is free and has no obligation. A GPhC-registered prescriber reviews your answers. Payment is taken when you place the order; if the prescriber decides the treatment is not suitable, the order is refunded automatically in full. Declined consultations are never a cost to you.

• Your approximate height and weight, so BMI can be assessed.
• A list of conditions you have been diagnosed with, especially high blood pressure, high cholesterol, sleep apnoea, heart disease, prediabetes or type 2 diabetes.
• Every medicine you take, including insulin or other diabetes treatments and any oral contraceptive. The SmPC advises switching to a non-oral method, or adding a barrier method (such as condoms), for 4 weeks after starting Mounjaro and for 4 weeks after each dose increase.¹
• Any previous weight loss treatments and how you got on with them.

Telling the prescriber about every medicine matters. For example, because Mounjaro slows how quickly the stomach empties, it can reduce the absorption of oral contraceptives, and people using insulin or sulfonylureas may need their doses adjusted because of the risk of low blood sugar. These are the kinds of details a prescriber works through with you, not reasons to guess for yourself.

Not sure whether you qualify? You can start the free consultation with no commitment and let the prescriber decide. If you are comparing providers first, our guide to a UK registered pharmacy for weight loss explains what to look for in a legitimate service.

Treatment is for adults. 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. If you are breastfeeding, discuss it with your prescriber so the decision reflects your circumstances. Always follow the patient information leaflet and your prescriber's advice.

06 · Results to expect

What results do the trials show?

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.² These are trial averages. Individual results vary, and treatment works alongside a reduced-calorie diet and increased physical activity, not instead of them.

To make the percentages concrete, take a worked example. For someone starting at 100 kg, 15% is about 15 kg, 19.5% is about 19.5 kg and 20.9% is about 21 kg. Your own starting weight and response will differ, so treat this as arithmetic, not a forecast.

The trial also reports how many people reached particular 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

Two points deserve emphasis. First, these figures describe groups, not individuals, and trial averages do not predict your own result. Second, the 72-week timescale is part of the result.

What you can say is that results build over months, they depend on dose, diet, activity and how well you tolerate the medicine, and they vary from person to person.

If you want a realistic plan, start with the consultation and discuss your goals with the prescriber. Our ongoing monthly reviews, dose titration and follow-up assessments exist so that the dose is adjusted to you rather than to an average. If you are comparing what different online providers offer, our page on how to choose an online pharmacy for weight loss drugs sets out the questions worth asking.

The licensed approach pairs a reduced-calorie diet and increased physical activity with medicine where you are eligible.

07 · NHS or private

NHS or private: which route suits you?

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.⁴ The NHS primary-care rollout began in June 2025 with the highest-need groups first, initially BMI 40+ with four or more qualifying conditions.⁶ 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. The two routes are not rivals. If you are in an early NHS group, your GP or local service is the place to start, and you may prefer it. The NHS guide to tirzepatide explains the medicine and who it is for.⁵

• You may be in an early NHS group. Ask your GP about current local access. The NHS prescription charge in England is £9.90 per item where it applies.
• You meet the licensed criteria but not the NHS ones. Examples are a BMI of 30 to 35, or a BMI of 27 to 30 with a weight-related condition. Private prescribing follows the licence rather than the NHS rollout stage.
• You want to start sooner. A private pharmacy can assess you through a free consultation and dispense after prescriber approval.

NHS access to Wegovy runs through specialist weight-management services; ask your GP about it.

Private treatment still needs proper clinical care. At EverydayMeds that means ongoing monthly reviews, dose titration, follow-up assessments and side-effect support from the prescribing team, plus a support line open Monday to Friday, 9am to 5pm, on 0333 207 0413 or at support@everydaymeds.co.uk.

If you start privately and later become eligible on the NHS, talk to your GP about the options. Nothing in a private prescription stops you asking. Whichever route you pick, use a pharmacy you can check on the GPhC register. Ours is registration 9012878, and you can look it up through the GPhC public register.¹²

For a broader view of what private online services involve, see our explainer on getting weight loss injections online, which covers the consultation and what to expect from your prescriber.

08 · Year costs

How much does a year of treatment cost?

Plan on pens, not months. All figures here are standard prices before discounts. A new customer's first order is £40 less, and every later order is £25 less.

A first year therefore 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. If you settle somewhere in between, the monthly standard price is the guide: £279.99 at 7.5mg, £290.99 at 10mg and £319.99 at 12.5mg.

Most people do not know their maintenance dose before they start. The prescriber steps the dose up and reviews how you are doing at each stage, so the first few months are about finding the strength that suits you. That is a clinical decision, not a budget one, but knowing the range lets you plan.

Three practical things keep the cost predictable:

• Know the range. Standard monthly pens run from £169.99 at 2.5mg to £329.99 at 15mg.
• Use the discounts. The new-customer discount applies to the first order at any dose, and the reorder discount applies automatically to every later order.
• Spread the cost if it helps. Klarna and pay-monthly options are available, and there is no subscription, so you only order when you are ready.

It is also worth deciding what you will do if you stop. Tirzepatide has a half-life of about five days, so it takes roughly 4 to 5 weeks to clear the system after a final dose. Nothing needs doing while it clears, and nothing speeds it up. Talk to your prescriber before stopping so the plan fits you.

For comparison, Wegovy's first pen costs £99.99 as a first-order price. Because its dose ladder has five steps, the year-long picture is different, and our product page shows current prices. See the options in our guide to an online pharmacy for weight loss injections.

09 · Other options

Wegovy, tablets, liraglutide and orlistat compared

Mounjaro is not the only prescription route, and the honest answer is that the right drug depends on the person.

Wegovy (semaglutide) is a once-weekly injection. The pens are 0.25mg, 0.5mg, 1mg, 1.7mg and 2.4mg. Titration steps up after at least 4 weeks, reaching the 2.4mg maintenance dose from week 17, and 2.4mg is the licensed maintenance dose for weight management.¹⁸ Its first pen costs £99.99 as a first-order price. Check availability at the time of order.

Mounjaro and Wegovy act differently. Tirzepatide activates GIP and GLP-1 receptors, while semaglutide is a single-action GLP-1 medicine.¹ Compare the Mounjaro first-order starting pen (£129.99) with the Wegovy first pen (£99.99), then look at the maintenance dose you are likely to need.

Weight loss tablets. Wegovy tablets (oral semaglutide) and Foundayo (orforglipron) are prescription-only oral GLP-1 medicines with their own product information.²⁰²¹ Their trial results come from separate studies and should not be compared with Mounjaro's as if they were head to head. For current prices, see our weight loss treatments page.

Liraglutide (Saxenda, and products such as Erly) is supplied at 6mg per millilitre and is a daily injection, unlike the once-weekly Mounjaro and Wegovy.

Orlistat is another licensed option, but figures vary, and your prescriber can advise on whether it suits you.

Supplements. So-called natural alternatives are low-cost supplements with no clinical oversight. They are not an established substitute for licensed medicines, and dramatic weight-loss claims on their packaging should be treated with caution.

Do weight loss tablets actually work? Licensed prescription tablets have their own published trials, and your prescriber can explain how they apply to you. Unlicensed pills sold online with dramatic claims are another matter entirely. If a product needs no consultation, it is not the same thing as a licensed medicine, whatever the label says.

The practical advice is to start with the consultation. A prescriber can look at your history and discuss which treatment is appropriate rather than leaving you to compare marketing.

10 · Safety and side effects

Is it safe? Side effects, reports and counterfeits

Mounjaro is a licensed prescription medicine, and it is safest when prescribed after a proper assessment and used as directed. Most side effects are digestive: the most common, affecting more than 1 in 10 people, are nausea, diarrhoea, vomiting, constipation and abdominal discomfort, and they are most likely when starting treatment or moving up a dose, usually easing within days to a few weeks.

If you notice a new symptom, speak to your prescriber. You can also report a suspected side effect through the MHRA Yellow Card scheme.¹⁹ If you notice a symptom that is not listed in the patient leaflet, you should still tell your prescriber so they can assess it.

Medicines that slow stomach emptying can affect other medicines. Mounjaro slows stomach emptying, which can reduce how well oral contraceptive pills are absorbed. The SmPC advises switching to a non-oral method, or adding a barrier method (such as condoms), for 4 weeks after starting Mounjaro and for 4 weeks after each dose increase.⁷ Tell the prescriber about insulin or sulfonylureas too, as their doses may need adjusting because of the risk of low blood sugar.

Counterfeit medicines are a real hazard for anyone buying weight loss drugs online. The MHRA publishes counterfeit medicine alerts and runs the Yellow Card scheme.⁷ To protect yourself:

• Check the register. A legitimate pharmacy has a GPhC registration you can verify on the public register.¹²
• Expect a consultation. Anyone offering to supply without a consultation or prescription is not operating legitimately.
• Beware of social media sellers. Marketplaces, social posts and messaging-app dealers are not regulated pharmacies.
• Know where it comes from. Our Mounjaro comes via official LillyDirect supply, direct from Eli Lilly's UK distribution, as genuine KwikPens.

A few more safety habits:

• Never share a pen or use one that was not dispensed to you.
• Follow the pen's instructions each week, and do not change the dose yourself.
• Do not combine your prescription with unlicensed products.
• Keep pens stored as directed in the leaflet, in the fridge before first use.¹³

Mounjaro (tirzepatide) is a prescription-only medicine, supplied only after an online consultation reviewed by a GPhC-registered prescriber. This page is information, not a substitute for medical advice.

11 · Choosing a pharmacy

How to choose an online pharmacy for weight loss drugs

Choose a pharmacy by checking registration, process, supply, aftercare and price transparency, in that order. Price comes last for a reason: the cheapest-looking offer is worth nothing if the product is not genuine or nobody reviews your care.

1. Registration. Look for a GPhC registration number and verify it on the public register.¹² Ours is 9012878. EverydayMeds is a full UK online pharmacy covering weight loss, sexual health, hair loss and acid reflux, not just a weight loss shop.

2. A real consultation. You should expect a health questionnaire and a review by a GPhC-registered prescriber who makes a clinical decision. Ours is free, with no obligation, and declined consultations are refunded in full automatically.

3. Genuine supply. Ask where the medicine comes from. We supply Mounjaro through official LillyDirect supply, with all six doses stocked from 2.5mg to 15mg, and every strength is in stock at the time of writing.

4. Aftercare. Weight loss treatment is not a one-off sale. Our prescribing team runs ongoing monthly reviews, dose titration and follow-up assessments, and offers side-effect support. Repeat orders re-check suitability, and nothing is auto-shipped.

5. Delivery you can rely on. Pens need to arrive in good condition. We use free next-day tracked delivery in temperature-controlled, discreet packaging, with same-day dispatch when you order by 3pm.

6. Honest pricing. The price shown should be the price paid. At EverydayMeds there are no hidden fees. Where we show comparisons, they are checked and dated: our index of the UK pharmacies we track was last checked 10 October 2026.

7. Support you can reach. We answer by phone, email and account-portal chat, Monday to Friday, 9am to 5pm.

It also helps to track your own progress. GLPTrackr is our free companion app for tracking a GLP-1 journey, available on iOS and Android. It is separate from the prescribing decision, but many people find it useful to log doses and notes between reviews. Over 100,000 customers have been supported on their weight loss journey with us, a measure of the customers we have served rather than a promise of any result.

If you want to compare providers side by side, our guide to the best online pharmacy for weight loss drugs covers the criteria in more detail. When you are ready, start the free consultation. The Mounjaro product page has current prices, and all of them carry the date checked.

12 · Starting and stopping

Starting, storing and stopping treatment

Treatment starts at 2.5mg and is stepped up by your prescriber, so you will not begin at the dose people quote from trials. Your first pen is a four-week supply.

That is one reason you do not skip ahead or change strength on your own.

Storage is simple but important. Keep unopened pens in the fridge until first use; they keep until the printed expiry date. Once a pen is in use, UK KwikPens are licensed for up to 30 days (not above 30°C) out of the fridge.¹³ If a pen has been left out of the fridge before it was opened, read the patient information leaflet and ask the pharmacy rather than guessing. Outside the tested window, sterility and potency are no longer assured.

Our package arrives in discreet, temperature-controlled packaging, and every order includes needles, a sharps bin and injection guidance. Follow the pen's instructions for how to inject.

What about stopping? Tirzepatide has a half-life of about five days, so after a final dose it takes roughly 4 to 5 weeks to clear the system. There is no way to speed this up, and nothing needs doing while it clears. Stopping is a decision to make with your prescriber, because what happens to weight afterwards matters.

The SURMOUNT-4 trial looked at continued treatment with tirzepatide for maintenance of weight reduction, which is why reviews do not end once you have lost weight.¹⁴ Our monthly clinical reviews help you decide whether to stay on a dose, change it, or pause.

Practical things to prepare before your first week:

• Choose a fixed day for your weekly injection.
• Read the leaflet and watch the pen instructions before your first dose.
• Plan meals around a smaller appetite, and keep a note of anything you notice.
• Decide who to contact if something feels wrong: your prescriber first, and the Yellow Card scheme for reporting.

If you would like to talk it through before ordering, our support team is available Monday to Friday, 9am to 5pm, on 0333 207 0413. When you are ready to move ahead, see the full range of weight loss treatments or begin with the free consultation.

13 · 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