Weight Loss Injections Price Comparison UK: Mounjaro, Wegovy, and Saxenda

Weight-loss injection prices vary in the UK depending on the provider. An online pharmacy may charge £99 for the starter pen, whereas another charges £179 for the same medicine and dosage. The initial advertised price may not reflect what you'll pay for ongoing treatment over several months.

This guide compares the prices of Mounjaro, Wegovy, and Saxenda to help you choose according to your budget. It contains current published price ranges, dose comparisons, examples of current costs, and information on access through the NHS. We'll also discuss how to check if a pharmacy is registered, medication safety, and the prescription process.

Weight Loss Injections Price Comparison UK: Costs at a Glance

Prices vary in the UK depending on the type of medication, the dose strength, and the pharmacy. Starting prices of some lower-strength treatments are less than £100 according to the published UK pharmacy comparisons in October 2026. Higher-strength presentations cost a few hundred pounds for a four-week supply.

Weight Loss Injections UK Price Comparison Table

Sources: Prices from MedEazy UK pharmacy comparison (16 October 2026); Curely's (23 October 2026) and Asda Online Doctor's (23 October 2026) published Saxenda prices. These are indicative prices and not offers. Discounts are applied to some minimum prices. Prices, availability, and extra fees also apply.

Both Mounjaro and Wegovy typically come in a package for four weekly doses. Saxenda is admistered by injection once a day, and comes in a five-pen pack that contains enough to last you 30 days.

Which Weight Loss Injection Has the Lowest Starting Price?

Based on the October 2026 price comparison in the UK, Wegovy 0.25mg had the lowest published starting price of £51 for the first 4 weeks and was the most affordable option. In the same data set, Mounjaro 2.5mg began at £99. However, these prices don't determine which treatment will be the most affordable for you.

Typically, both medications start at lower doses, and a prescriber may adjust the dose based on your response. Higher strengths are often more expensive, and some individuals stay on the lower maintenance dose based on their clinical response. A discounted starter price also might not apply to subsequent prescriptions.

What Affects the Cost of Weight Loss Injections?

There are several reasons for the price differences between UK providers. The most apparent one is the strength of the medication. For instance, a Mounjaro 15mg pen is typically more expensive compared to a 2.5mg starter pen. Retail prices are also determined by pharmacies. Their prices may vary due to competition in the market, supplier costs, delivery terms, and the clinical services included.

Other considerations include:

• Initial offers that expire after the initial purchase.
• Prescription or consultation fees.
• Subscription fees and conditions for cancellation.
• Clinical reviews and ongoing patient support.
• Delivery charges, injection supplies, and sharps disposal.

When comparing two quotes, it’s important to verify that they are for the same prescription, dosage, and treatment length.

Mounjaro Price Comparison UK: Costs by Dose

Mounjaro is a prescription drug that targets two appetite-regulating hormone receptors (GIP and GLP-1). It's a once-a-week injection prescribed only to adults with a BMI of 30 or above, or 27 and above with a weight-related condition, along with a balanced diet and exercise plan.

Mounjaro Prices from 2.5mg to 15mg

There are six strengths of Mounjaro. The published October 2026 prices reflect the higher cost at higher doses.

Source: MedEazy, 16 October 2026. Prices refer to four weekly doses and may include promotional discounts.

The difference between the lowest and highest published Mounjaro 2.5mg price is £120. At 15mg, the difference reaches £130. These comparisons show why it's worth examining several registered UK pharmacies. However, the cheapest offer at one strength may not remain competitive at another.

A prescriber will determine an appropriate dose based on your individual medical history, response to treatment, and side effects. Don't increase the dose just because you're taking the medication on a normal schedule. If you want more information on dosage, please see our detailed Mounjaro price comparison UK guide.

Why Do Mounjaro Prices Differ Between UK Pharmacies?

Pharmacies have different operating costs, supplier arrangements, and service models. One provider may charge a separate fee for a clinical consultation. Another might include prescribing assessments, follow-up advice, and standard delivery within its quoted price.

Some special online pharmacies also provide reduced rates for new clients. Confirm if the rate applies only to the first purchase or if subsequent orders are at the normal price.

Does the Cheapest Mounjaro Offer the Best Value?

Not necessarily. Suppose Pharmacy A charges £99 for your first four-week supply, then £195 for the next order, while Pharmacy B charges £150 per order. Over eight weeks, Pharmacy A costs £294, while Pharmacy B costs £300. The initial £51 difference has almost disappeared.

This comparison gets even more complicated if your prescription strength changes or one provider charges additional fees for other clinical services. While a low price can save you some pounds, reliable clinical support and safe dispensing matter just as much. Check out the Mounjaro page for current prices, product information, and the prescription process.

Wegovy Price Comparison UK: Monthly Costs Explained

Wegovy contains semaglutide, a GLP-1 receptor agonist that helps regulate appetite and fullness. Similar to Mounjaro, Wegovy is typically injected once a week, and the price depends on the prescribed dose and the pharmacy.

Wegovy Price Comparison by Dose

Source: MedEazy, 16 October 2026. Prices are for four weekly doses including discounts where applicable.

Treatment with injections typically starts at 0.25mg per week. The dose can be gradually increased according to the prescription and the patient's clinical response.

In January 2026, the UK Medicines and Healthcare products Regulatory Agency (MHRA) approved a higher weekly dose of Wegovy of 7.2mg. It then approved a dedicated 7.2mg pen in April 2026. This higher dose is intended for eligible adults with obesity and a BMI of 30 or above. However, not everyone taking Wegovy will need or qualify for this dose.

Does Wegovy Become More Expensive at Higher Doses?

Generally, the published Wegovy prices increase with strength. At the lowest prices recorded in October 2026, the difference between 0.25mg and 2.4mg was £65 per four-week supply. However, comparing the cheapest quote at each dose doesn't necessarily reflect what the provider will charge throughout treatment.

If you’re budgeting for ongoing treatment, compare the standard price of each strength from the same provider. Your prescriber might also want you to stay on that dose or to modify treatment according to tolerability. For an in-depth look at pricing information, read our Wegovy price comparison UK guide.

How Can You Compare Wegovy Providers?

Check the full four-week cost, including any prescribing charges and delivery. You'll also want to know how frequently your treatment is reviewed and what support is available if you experience side effects. A higher advertised price might include services that another provider charges for separately. Finally, confirm you're comparing injections with injections.

The UK authorised oral Wegovy in June 2026 and another oral treatment, Foundayo, in August 2026. Tablets have different dosing and pricing arrangements, so they aren't included in these injection tables. You can read more about the injectable medicine on the Wegovy product page.

Saxenda Price Comparison UK: Daily Injection Costs

Saxenda contains liraglutide, another GLP-1 receptor agonist used for weight management. Unlike Mounjaro and Wegovy, Saxenda is administered daily. This difference matters when comparing prices.

How Much Does Saxenda Cost Privately?

Saxenda is available in packs of one, three, or five pens, though not every provider offers every pack size. Each pen contains 18mg of liraglutide.

At the usual adult maintenance dose of 3mg daily, one pen provides six days of treatment. A five-pen pack therefore provides approximately 30 days. The five-pen pack at Curely is currently listed at £200. Asda Online Doctor listed the five-pen pack at £230 in October 2026.

During initial dose escalation, patients use smaller prescribed amounts, so pens may last longer. The amount needed can change as treatment progresses.

Is Saxenda Cheaper than Mounjaro or Wegovy?

You can't establish that by comparing a single Saxenda pen with a four-week Mounjaro or Wegovy pen. The quantities cover different treatment periods. For Saxenda, calculate the number of pens needed at the prescribed dose. Then compare that expense with the equivalent treatment period for the weekly medications.

Availability also matters. Saxenda has experienced supply disruptions, and individual pharmacies may have different stock levels. For more information about the medicine and its presentation, check out our Saxenda product page.

UK Pharmacy Price Comparison: Boots, Numan and Other Providers

The UK market includes large pharmacy chains, online prescribing services and specialist weight management providers. When comparing these services, look beyond the lowest advertised starter price for Mounjaro or Wegovy.

Comparing Weight Loss Injections from UK pharmacies

The following published examples illustrate how providers price the same medication and strength:

Important Note: Provider information reviewed 23 October 2026. These are published examples, not guaranteed checkout prices. Numan's displayed prices differ between its own pages, so its current quote needs confirmation.

For a more accurate comparison, record the standard price and any temporary discount separately. Check if the quote includes assessment, prescribing, standard delivery and follow-up care. This ensures you don't end up comparing a medication-only price with a complete weight management programme.

Boots vs Numan vs Other UK Online Pharmacies

Different providers organise their services differently. Boots Online Doctor offers weight management consultations, online treatment services and access to pharmacy support. Some additional coaching services have separate fees.

Numan operates a subscription-based weight management programme. Its published information describes rolling plans, dose-dependent prices and alternative commitment packages.

Other providers, including MedExpress, Oxford Online Pharmacy and Simple Online Pharmacy, have their own prescribing arrangements and pricing policies. The right comparison depends on the services you actually need. For more detailed provider information, read our separate guides covering Boots, MedExpress, and Numan Mounjaro prices.

What's Included in a Quoted Price?

Before committing to private treatment, ask the provider these questions:

• Does the amount cover the prescription and clinical assessment?
• Are repeat consultations included?
• Is delivery charged separately?
• What are the needles and sharps-disposal arrangements?
• Do you charge a membership fee?
• What's the price when your prescription changes?

Some pharmacies include ongoing clinical support within their treatment prices. Others offer additional services separately. The final quoted price should be clear before you commit to an order.

The Real Cost of Weight Loss Injections Over Three, Six and Twelve Months

The first pen is just a fraction of your treatment budget. If you're comparing ongoing prescription costs, use a longer-term estimate, not the initial advertised price.

Receiving an introductory discount of £60 is a meaningful saving on your first order. But if the pharmacy charges £20 more than another provider for each subsequent four-week supply, the discount can disappear after several repeat orders.

Your prescribed strength may change, too. This is why the cheapest pharmacy for a starter dose won't necessarily have the lowest ongoing treatment cost.

How to Calculate Your Total Prescription Costs

Use this formula for each treatment period:

Total cost = Medication price + compulsory consultation or prescription fees + delivery + other required charges

Then add the individual periods together.

When comparing subscriptions, include membership charges and review any cancellation or commitment conditions. Keep treatment duration consistent. One four-week supply covers 28 days, which isn't the same as a calendar month.

Example Three-Month and Six-Month Budgets

Consider the following a hypothetical treatment budget of £180 per four-week supply, with no additional charges:

These figures illustrate purchasing costs only. They aren't a recommended dose schedule or a prediction of the treatment you'll receive. Six four-week supplies cover 168 days, slightly less than six calendar months. Similarly, 12 supplies cover 48 weeks. A full 52-week year requires 13 four-week supplies when treatment continues weekly without interruption.

If delivery costs £5 per order, the annual example increases from £2,340 to £2,405. Use this example calculation and replace the hypothetical £180 with actual prices quoted for your prescribed medication. Our guide on Wegovy costs per month UK explains other factors that can affect the ongoing cost of the medication.

Other Possible Treatment Expenses

Medication isn't always the only cost. Temperature-controlled delivery may require special packaging or shipping arrangements. The pharmacy should explain how the medicine will be transported and stored safely.

You may also need injection needles, a sharps container, or suitable disposal arrangements. Some providers include these items. Others charge separately. Clinical assessments, follow-ups, and subscription fees may also increase the overall amount. If you change providers, the new prescriber might require a fresh assessment before continuing treatment.

Compare the total price of your prescribed treatment, not just the first pen. Don't change your injection schedule, split doses, or try to extract additional medication from a pen to reduce costs. These practices can create serious safety risks.

Mounjaro vs Wegovy vs Saxenda: Which Offers Better Value?

The lowest price doesn't automatically mean the most suitable treatment. Effectiveness, potential side effects, your medical history, and the support you receive all influence value.

How the Three Medications Work

Mounjaro contains tirzepatide, which acts on both GIP and GLP-1 receptors. Wegovy contains semaglutide, while Saxenda contains liraglutide. Both act on GLP-1 receptors, which affect appetite and food intake through hormone-related pathways. They can help you feel fuller and reduce hunger, alongside appropriate dietary changes and increased physical activity.

Mounjaro and injectable Wegovy are taken weekly. Saxenda is administered daily. The differences in dosing frequency may affect convenience, but medication choice should follow a clinical assessment.

What Do Clinical Trials Show?

A major head-to-head study, SURMOUNT-5, compared tirzepatide with semaglutide in adults with obesity, or overweight with a weight-related condition, who did not have diabetes. Published in the New England Journal of Medicine in May 2025, the trial included 751 participants.

After 72 weeks, average weight loss was 20.2% with tirzepatide and 13.7% with semaglutide. Participants received specified maximum tolerated weekly doses alongside lifestyle interventions. However, these are clinical trial averages and not guaranteed results for any person. They also don't specifically outline a comparison with other drugs (such as Wegovy 7.2mg), and they can't predict the results of all authorised doses.

Read our comparison guide on Wegovy vs Mounjaro, which breaks down how they work, clinical results, side effects, who they're suitable for, and how to access them in the UK.

Suitability Matters More than the Lowest Price

Weight loss injections are prescription-only medicines, not general-purpose cosmetic weight-loss treatments. Common side effects include nausea, vomiting, diarrhoea and constipation. Some people also experience serious problems, including pancreatitis and gallbladder complications.

They're also not recommended during pregnancy. Some medications also have important interactions or contraception considerations. For example, MHRA guidance advises people taking tirzepatide with oral contraception to use additional or alternative protection for four weeks after starting treatment and after each dose increase.

A qualified prescriber should review your medical history, current medicines and relevant health conditions. Treatment should also include appropriate follow-up and monitoring.

Can You Get Weight Loss Injections on the NHS?

The NHS offers prescription-only weight management medications to eligible patients. Eligibility differs from private prescribing, and you must follow the relevant NHS pathway to access the medication.

Eligibility on the NHS for Weight-Loss Treatment

NICE guidance TA1026 recommends prescribing tirzepatide to adults with:

• Initial body mass index (BMI) ≥ 35.
• At least one health issue related to weight.
• Some ethnic groups have reduced BMI thresholds, typically 2.5 lower.

Importantly, these recommendations don't mean everyone meeting those criteria can immediately receive tirzepatide through an NHS GP service. NHS England introduced phased primary-care access on 23 June 2025, prioritising people with the greatest clinical need.

Its initial approach included people with particularly high BMI levels and several qualifying conditions, such as high blood pressure, type 2 diabetes, cardiovascular disease, abnormal blood fats or obstructive sleep apnoea.

From around June 2026, the planned primary-care cohort expanded to include people with a BMI of 35-39.9 and four qualifying conditions, subject to applicable adjustments and local implementation. Specialist weight management services have separate access arrangements. People in Scotland, Wales, and Northern Ireland also use different NHS systems and treatment pathways.

How Much Do Weight Loss Injections Cost?

In England, the standard NHS prescription charge is £9.90 per item as of October 2026, unless you're entitled to free prescriptions. Prescription charges are not applied in Scotland, Wales or Northern Ireland. These charges differ from private pharmacy prices, where patients usually pay for the medication and related services.

NHS vs Private Prescriptions

How to Choose a Safe, Regulated Weight Loss Treatment Provider

While saving money is important, the lowest price shouldn't be the deciding factor when it comes to your safety. Any legitimate provider will describe its consultation process, how it prescribes, and how it will support you in the long term.

Check Pharmacy Registration

To find a registered pharmacy in Great Britain, look in the register of the General Pharmaceutical Council (GPhC). In Northern Ireland, use the register of the Pharmaceutical Society of Northern Ireland. The name of the business and regulatory information should be easily accessible via GPhC-registered pharmacies so that you can confirm it yourself.

Curely is registered as a distance-selling pharmacy on the GPhC register based in Glasgow. It has published information on its services, including online consultations and discreet dispensing. Registration is a crucial safeguard, but still check the quality of the service.

Expect a Proper Clinical Assessment

A short questionnaire can begin an online consultation. However, it isn't enough to confirm a patient can safely receive weight-loss medication.

In February 2025, the GPhC strengthened prescribing safeguards for online pharmacies supplying weight management medicines. Prescribers in GPhC-registered UK pharmacies must independently verify relevant information, such as weight, height, or BMI, rather than relying solely on self-reported questionnaire answers.

Your assessment should also consider relevant medical conditions, other medication, and potential risks. A reputable service won't guarantee approval before a qualified healthcare professional has reviewed your circumstances.

Be Alert for Suspicious Sellers and Unsafe Products

Exercise extreme caution if a seller offers prescription-only medication over the counter. Other warning signs include unverifiable pharmacy details, unusual packaging, or products offered through unregulated social media accounts.

The MHRA reported falsified Mounjaro 15mg pens in February 2026. The affected pens had faulty mechanisms and were associated with a specific batch. This demonstrates why checking the legitimacy of a supplier matters.

Effective weight management

Weight Loss Medication

Easy access to treatment with trusted pharmacist support.

Begin Consultation

Frequently Asked Questions

What Are the Cheapest Weight Loss Injections in the UK?

The MedEazy price comparison in October 2026 listed Wegovy 0.25mg at a cost of £51 for four weeks, and Mounjaro 2.5mg was priced at £99 for four weeks. However, the cheapest weight-loss injections in the UK depend on the prescribed dosage, the pharmacy, and any promotional offers. Don't just look at the first discounted price; compare the ongoing prices from various providers.

Is Mounjaro Cheaper Than Wegovy?

It depends on the dose and pharmacy. In the October 2026 comparison, Mounjaro 2.5mg started at £99, while Wegovy 0.25mg started at £51. These doses aren't clinically equivalent, though. For a fair cost comparison, consider your prescribed treatment, ongoing prices, and any additional fees.

Why Do Weight Loss Injection Prices Increase with Dosage?

Higher-strength weight loss medicines often cost more due to differences in wholesale costs and pharmacy pricing. Market competition can also affect prices. However, not everyone needs the highest dose. Your prescriber will recommend adjustments based on your progress, side effects, and medical needs.

How Much Do Weight Loss Injections Cost for Six Months?

Costs depend on your medication, dosage, and pharmacy. For example, six four-week supplies at £180 each would cost £1,080 before additional fees. These cover 24 weeks, not six full calendar months. Your total may also increase if your prescribed dose changes or the pharmacy charges extra.

Do Online Pharmacies Charge Consultation or Delivery Fees?

Some pharmacies include consultations, prescriptions, and delivery in the headline price, while others charge separately. Certain weight loss jabs also require temperature-controlled shipping. Always check the final price, including delivery fees and any subscriptions, before ordering.

Can I Get Weight Loss Injections Free on the NHS?

Yes, if you're eligible for NHS weight management treatment and qualify for free prescriptions. In England, the standard prescription charge is £9.90 per item unless you're exempt. Prescriptions are free in Scotland, Wales and Northern Ireland. Access depends on clinical eligibility and local NHS services.

Is It Safe to Buy Weight Loss Injections Online?

Yes, if you use a regulated pharmacy. Check the GPhC register in Great Britain or the Pharmaceutical Society of Northern Ireland's register. Legitimate providers require a valid prescription and medical assessment. The MHRA has also warned about counterfeit weight loss pens, so avoid unregulated sellers.

Can I Switch Pharmacies to Get a Lower Prescription Price?

Yes, you can ask another registered pharmacy to assess whether it can continue your treatment. The new provider may need your current dose, medical history, and prescription details. Switching could save money, but always seek medical advice before changing your medication or dosage.

Conclusion

Weight loss injection prices in the UK vary significantly by medication, dose, and pharmacy. The cheapest starting price won't always offer the best value, so compare ongoing costs, additional fees, and what's included. Mounjaro, Wegovy, and Saxenda also differ in how they work and how often you take them. This is why your medical needs should guide your choice, not just the price.

Always choose a regulated pharmacy that provides proper clinical evaluation and ongoing support. Take the first step today by scheduling an online consultation with a qualified prescriber at Curely, who'll gauge your eligibility for weight management treatment and discuss the next steps for you.

References

• Aronne, L. J., Horn, D. B., le Roux, C. W., Ho, W., Falcon, B. L., Gomez Valderas, E., Das, S., Lee, C. J., Glass, L. C., Senyucel, C., & Dunn, J. P. (2025). Tirzepatide as compared with semaglutide for the treatment of obesity. The New England Journal of Medicine, 393(1), 26–36.
• General Pharmaceutical Council. (2025, February 4). Online pharmacies to strengthen safeguards to prevent unsafe supply of medicines.
• MedEazy. (n.d.). Weight loss treatment price data (machine-readable).
• Medicines and Healthcare products Regulatory Agency. (2026a, January 16). Medicines regulator approves up to 7.2mg dose of semaglutide (Wegovy) for patients with obesity only.
• Medicines and Healthcare products Regulatory Agency. (2026b, February 5). GLP-1 medicines for weight loss and diabetes: What you need to know.
• Medicines and Healthcare products Regulatory Agency. (2026c, February 24). Falsified Mounjaro KwikPen 15mg pre-filled pens.
• Medicines and Healthcare products Regulatory Agency. (2026d, April 14). Single-dose 7.2mg semaglutide (Wegovy) pen approved to treat adult patients with obesity.
• Medicines and Healthcare products Regulatory Agency. (2026e, June 11). First GLP-1 tablet for weight loss approved in the UK.
• Medicines and Healthcare products Regulatory Agency. (2026f, August 10). UK first in Europe to authorise orforglipron for weight management and type 2 diabetes.
• National Institute for Health and Care Excellence. (2024, December 23). Tirzepatide for managing overweight and obesity (Technology appraisal guidance TA1026).
• NHS Business Services Authority. (n.d.). What are the current costs of NHS treatment in England?
• NHS England. (2026, April 2). Interim commissioning guidance: Implementation of the NICE technology appraisal TA1026 and the NICE funding variation for tirzepatide (Mounjaro) for the management of obesity.
• NHS England. (n.d.). Weight management injections.
• Pharmaceutical Society of Northern Ireland. (n.d.). Pharmaceutical Society NI.