Orlistat vs Mounjaro UK: Compare & Save 10% | Cured

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Cheapest Orlistat vs Mounjaro UK - Price £124.99

Compare Orlistat and Mounjaro at the cheapest UK price from £124.99 plus £20 off your first order with code Weightlossnew.

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Pricing Disclaimer: Prices on some pages may not be up to date — the live pricing table below and pricing shown during consultation are official current prices and take precedence over any other figures on the site.

Mounjaro (Tirzepatide)
Weeks 1–4

2.5mg

1 pen • 4 Weeks

£145 £124.99

£31.25 / Per Week

Your starting dose – designed to help your body adjust gently to treatment

⭐ Future Orders at £145
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Mounjaro (Tirzepatide)
Weeks 5–8

5mg

1 pen • 4 Weeks

£179 £159.00

£39.75 / Per Week

First step up – builds on your progress as your body adapts to treatment

⭐ Future Orders at £179
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Mounjaro (Tirzepatide)
Weeks 9–12

7.5mg

1 pen • 4 Weeks

£220 £200.00

£50.00 / Per Week

Mid-range dose – for continued progression and enhanced results

⭐ Future Orders at £220
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Mounjaro (Tirzepatide)
Weeks 13–16

10mg

1 pen • 4 Weeks

£245 £225.00

£56.25 / Per Week

Higher strength dose – supports significant weight loss progress

⭐ Future Orders at £245
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Mounjaro (Tirzepatide)
Weeks 17–20

12.5mg

1 pen • 4 Weeks

£270 £250.00

£62.50 / Per Week

Advanced dose – for patients requiring stronger therapeutic effect

⭐ Future Orders at £270
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Mounjaro (Tirzepatide)
Weeks 21+

15mg

1 pen • 4 Weeks

£287 £267.00

£66.75 / Per Week

Maximum dose – the highest available strength for optimal results

⭐ Future Orders at £287
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Wegovy (Semaglutide)
Weeks 1–4

0.25mg

1 pen • 4 Weeks

£89 £69.00

£17.25 / Per Week

Your starting dose – eases your body into treatment with minimal side effects

⭐ Future Orders at £89
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Wegovy (Semaglutide)
Weeks 5–8

0.5mg

1 pen • 4 Weeks

£99 £79.00

£19.75 / Per Week

First step up – continues building tolerance for long-term success

⭐ Future Orders at £99
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Wegovy (Semaglutide)
Weeks 9–12

1mg

1 pen • 4 Weeks

£119 £99.00

£24.75 / Per Week

Mid-range dose – where most patients start seeing meaningful results

⭐ Future Orders at £119
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Wegovy (Semaglutide)
Weeks 13–16

1.7mg

1 pen • 4 Weeks

£169 £149.00

£37.25 / Per Week

Higher strength – supports accelerated weight loss progress

⭐ Future Orders at £169
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Wegovy (Semaglutide)
Weeks 17+

2.4mg

1 pen • 4 Weeks

£199 £179.00

£44.75 / Per Week

Maximum dose – the highest available strength for optimal weight management

⭐ Future Orders at £199
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Wegovy Oral Pill
Weeks 1–4

1.5mg

1 pen • 4 Weeks

£83.00 £63.00

£20.75 / Per Week

Your starting dose – eases your body into treatment with minimal side effects

⭐ Future Orders at £83.00
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Wegovy Oral Pill
Weeks 5–8

4mg

1 pen • 4 Weeks

£110.00 £90.00

£27.50 / Per Week

First step up – continues building tolerance for long-term success

⭐ Future Orders at £110.00
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Wegovy Oral Pill
Weeks 9–12

9mg

1 pen • 4 Weeks

£140.00 £120.00

£35.00 / Per Week

Mid-range dose – where most patients start seeing meaningful results

⭐ Future Orders at £140.00
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Wegovy Oral Pill
Weeks 13+

25mg

1 pen • 4 Weeks

£199.00 £179.00

£49.75 / Per Week

Maximum dose – the highest available strength for optimal weight management

⭐ Future Orders at £199.00
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Orlistat vs Mounjaro: Clinical Comparison for UK Patients

Published on: June 03, 2026

Understanding the orlistat vs mounjaro uk comparison is essential for choosing the right weight loss treatment. At Cured Pharmacy, our UK-registered clinical team helps patients navigate these two distinct approaches—Orlistat's fat-blocking mechanism versus Mounjaro's dual-hormone action—with transparent pricing and expert guidance throughout your weight loss journey.

How Orlistat and Mounjaro Work Differently

Orlistat and Mounjaro represent fundamentally different approaches to weight management, each licensed by the MHRA for distinct patient groups. Orlistat (including branded Xenical and Alli) works locally in your digestive system by blocking approximately 25% of dietary fat absorption through lipase enzyme inhibition [1]. This unabsorbed fat passes through your system, requiring commitment to a reduced-fat diet to minimise gastrointestinal side effects.

Mounjaro contains tirzepatide, the first dual GIP/GLP-1 receptor agonist licensed in the UK for weight management [2]. Unlike Orlistat's digestive mechanism, tirzepatide works systemically by activating two natural hormone pathways that regulate appetite, slow gastric emptying, and improve insulin sensitivity. This dual-action approach produces substantially greater weight reduction in clinical trials compared to single-pathway treatments.

The choice between these medications depends on your BMI, medical history, weight loss goals, and tolerance for different administration methods. Orlistat requires three daily capsules with meals, whilst Mounjaro involves a single weekly subcutaneous injection administered via a pre-filled pen device.

Clinical Trial Data: Orlistat vs Mounjaro Weight Loss Results

Clinical evidence demonstrates markedly different efficacy profiles between these treatments. In pooled analyses of Orlistat trials, patients achieved an average additional weight loss of 2.9 kg compared to placebo over 12 months when combined with dietary modification [1]. This translates to approximately 5-10% total body weight reduction for compliant patients following a reduced-calorie, lower-fat eating plan.

Mounjaro's clinical trial programme shows substantially greater results. In the SURPASS-3 trial, patients receiving the 15 mg maintenance dose achieved an average 22.5% body weight reduction over 72 weeks [2]. The SURMOUNT-1 trial specifically examining weight management demonstrated that 91% of participants on the highest dose achieved at least 5% weight loss, with 57% achieving 20% or greater reduction [3].

These differences reflect the distinct mechanisms and patient populations each treatment serves. Orlistat provides modest, steady weight loss for patients requiring digestive-focused intervention, whilst Mounjaro delivers more substantial reductions through systemic metabolic effects. Your UK prescriber will assess which approach aligns with your clinical profile and weight management objectives.

Time to Results: What to Expect

Orlistat typically produces gradual weight loss visible within 2-4 weeks of consistent use alongside dietary changes. Maximum benefit usually occurs within 6 months, with weight maintenance thereafter requiring continued medication and lifestyle adherence. Mounjaro follows a dose-escalation schedule over 4-5 months, with most patients noticing appetite reduction within the first fortnight and measurable weight loss by week 4. Peak efficacy develops over 6-12 months as you reach your optimal maintenance dose [2][3].

Side Effects and Tolerability Profile

Orlistat's side effects directly relate to its fat-blocking mechanism. The most common include oily spotting, flatulence with discharge, faecal urgency, and fatty or oily stools—effects that intensify when consuming meals exceeding 30% fat content [1]. These gastrointestinal symptoms affect approximately 15-30% of users but typically improve with dietary fat reduction. Orlistat also reduces absorption of fat-soluble vitamins, so supplementation with vitamins A, D, E, and K is recommended, taken at least 2 hours apart from Orlistat doses.

Mounjaro's side effect profile centres on gastrointestinal adaptation to GLP-1 receptor activation. The most frequently reported effects include nausea (reported by 20-30% of trial participants), diarrhoea, decreased appetite, vomiting, and constipation [2]. These symptoms typically occur during dose escalation phases and diminish as your body adapts. Starting at lower doses and following the prescribed titration schedule significantly improves tolerability. Rare but serious risks include pancreatitis and gallbladder disease, which your prescriber will discuss during assessment.

Both medications require clinical monitoring, though the nature differs. Orlistat necessitates attention to fat-soluble vitamin levels and bowel habit changes, whilst Mounjaro requires monitoring for signs of pancreatitis, changes in heart rate, and potential thyroid effects. Neither medication should be used during pregnancy, and both require disclosure of all current medications to avoid interactions.

Feature Orlistat Mounjaro
Active Ingredient Orlistat Tirzepatide
Mechanism Blocks 25% fat absorption Dual GIP/GLP-1 receptor agonist
Administration 3 capsules daily with meals Once-weekly injection
Average Weight Loss 5-10% body weight over 12 months Up to 22.5% body weight over 72 weeks
Starting Price at Cured From £124.99 From £124.99
Common Side Effects Oily stools, flatulence, urgency Nausea, diarrhoea, decreased appetite
Dietary Requirements Low-fat diet essential Flexible eating approach
BMI Requirement 28+ (with conditions) or 30+ 27+ (with conditions) or 30+

Orlistat vs Mounjaro: Cost Comparison at Cured Pharmacy

Pricing represents a significant consideration when comparing these treatments. At Cured Pharmacy, Orlistat starts from £135.00 for generic formulations, with branded Xenical available from £135.00 and lower-dose Alli from £135.00. These prices reflect monthly supply costs, making Orlistat the more economical option for budget-conscious patients seeking modest weight reduction.

Mounjaro pricing reflects its advanced dual-receptor technology and more substantial clinical outcomes, starting from £124.99 per monthly supply at Cured Pharmacy. Whilst representing a higher investment, many patients find the greater efficacy, once-weekly administration, and reduced dietary restrictions justify the additional cost. New patients can access 10% savings using code WEIGHTLOSSNEW, reducing initial treatment costs.

Cost-effectiveness extends beyond unit pricing. Orlistat requires consistent three-times-daily dosing and strict dietary fat limitation, whilst Mounjaro's weekly injection and flexible eating approach may improve long-term adherence for some patients. Your UK prescriber will help weigh financial considerations against clinical suitability, expected outcomes, and lifestyle factors during your free consultation.

Transparent Pricing Before Consultation

Unlike many online services, Cured Pharmacy displays exact treatment costs before you begin your clinical assessment. This transparency allows informed decision-making about which weight loss approach fits both your clinical needs and budget. All prices include UK prescriber consultation, with no hidden fees or surprise charges at checkout.

Who Should Choose Orlistat vs Mounjaro?

Orlistat suits patients with BMI 28 or above (with weight-related health conditions) or BMI 30 or above, who prefer oral medication, have concerns about injections, or require a lower-cost option. It works best for individuals committed to dietary fat reduction and who can manage potential gastrointestinal effects. Orlistat may be particularly appropriate for patients with contraindications to GLP-1 receptor agonists or those seeking modest, steady weight reduction as part of comprehensive lifestyle modification.

Mounjaro is licensed for adults with BMI 30 or above, or BMI 27 or above with weight-related comorbidities such as hypertension, type 2 diabetes, or dyslipidaemia [2]. It represents the optimal choice for patients seeking maximum weight reduction, those who have not achieved goals with previous treatments including Orlistat, or individuals who prefer once-weekly administration. Mounjaro may also suit patients unable to tolerate Orlistat's gastrointestinal effects or those requiring more flexible dietary approaches.

Certain medical histories preclude one or both treatments. Orlistat is contraindicated in chronic malabsorption syndrome, cholestasis, or during pregnancy and breastfeeding. Mounjaro should not be used by patients with personal or family history of medullary thyroid carcinoma, multiple endocrine neoplasia syndrome type 2, or during pregnancy. Your Cured Pharmacy prescriber will conduct thorough medical screening to determine which treatment—if either—is clinically appropriate for your individual circumstances.

Combination and Sequential Approaches

Some patients begin with Orlistat to achieve initial weight loss before transitioning to Mounjaro if greater reduction is needed. Others may use Orlistat for weight maintenance after completing a Mounjaro course. These sequential strategies require prescriber guidance and cannot be implemented simultaneously due to different mechanisms and monitoring requirements. Your UK clinical team will advise whether staged approaches might benefit your long-term weight management plan.

Starting Your Weight Loss Treatment at Cured Pharmacy

Beginning treatment requires completion of our comprehensive online medical questionnaire, reviewed by UK-registered prescribers within our clinical team led by Superintendent Pharmacist Tarun Kumar (GPhC 2233073). The assessment takes under 3 minutes and evaluates your medical history, current medications, weight loss goals, and suitability for Orlistat, Mounjaro, or alternative treatments including Wegovy and Saxenda.

If your prescriber approves treatment, your medication is dispensed from our GPhC-registered pharmacy (9012511) and dispatched in 100% discreet packaging via tracked delivery. For Mounjaro, your first prescription includes detailed injection technique guidance, storage instructions, and dose escalation schedule. Orlistat prescriptions include dietary advice to optimise efficacy and minimise side effects. Both treatments include ongoing prescriber access for questions or concerns throughout your treatment journey.

We maintain the lowest prices guaranteed across the UK online pharmacy sector, with transparent upfront costs displayed before consultation. New patients save £20 using code WEIGHTLOSSNEW at checkout. All consultations are provided free of charge—you pay only for approved medication. Should your prescriber determine that neither Orlistat nor Mounjaro is clinically appropriate, they may recommend alternative approaches or suggest consultation with your NHS GP for further evaluation.

Scientific References

  1. Yanovski, S. Z., & Yanovski, J. A. (2014). Long-term drug treatment for obesity: a systematic and clinical review. JAMA, 311(1), 74–86. https://doi.org/10.1001/jama.2013.281361 [accessed 13 August 2026]
  2. Jastreboff, A. M., et al. (2022). Tirzepatide Once Weekly for the Treatment of Obesity. New England Journal of Medicine, 387(3), 205–216. https://doi.org/10.1056/NEJMoa2206038 [accessed 13 August 2026]
  3. Garvey, W. T., et al. (2022). Tirzepatide once weekly for the treatment of obesity in people with type 2 diabetes (SURMOUNT-2): a double-blind, randomised, multicentre, placebo-controlled, phase 3 trial. The Lancet, 402(10402), 613–626. https://doi.org/10.1016/S0140-6736(23)01200-X [accessed 13 August 2026]
  4. NHS. (2026). Tirzepatide: a medicine to manage type 2 diabetes and treat obesity. https://www.nhs.uk/medicines/tirzepatide/ Accessed 13 August 2026.
  5. NHS. (2026). Overweight and obesity in adults. https://www.nhs.uk/conditions/overweight-and-obesity/ Accessed 13 August 2026.
  6. NHS England. (2026). Weight management injections. https://www.england.nhs.uk/ourwork/prevention/obesity/medicines-for-obesity/weight-management-injections/ Accessed 13 August 2026.

Information on this page is for educational purposes only and is not medical advice. All prescription treatments require clinical assessment by a UK-registered prescriber. Always consult a qualified healthcare professional before starting any new medication. Weight loss results vary between individuals and depend on adherence to treatment and lifestyle modifications.

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Jane L.

"Brilliant. Lost 4 stone on mounjaro no side effects at all. Cured pharmacy are excellent. Always helpful pens sent out quickly always comes with needles and sterile wipes. If you want to go on GLP-1 go to cured pharmacy. So professional. Thank you cured pharmacy you changed my health and well being."

Ann-Marie

"I absolutely love this product, I have been using 2.5mg as maintenance dose and have managed to control my weight without any side effects and can still eat well balanced meals. The pharmacy is very efficient friendly and helpful I would not purchase from anywhere else."

Sacha W.

"So far I'm really impressed by my results it's crazy cause I'm not snacking like how I used to do and I see my face slimming down already and it's only been 2 and a half weeks. Can't wait to give my feedback in 5 months time thank you cured pharmacy."

Kimberly G.

"Mounjaro has corrected my hormonal weight gain during menopause. I am using it now to maintain that balance. The results for me have been exceptional!"

Jennifer

"Great really helps cure those nasty habits can't wait for my next mounjaro pen."

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Faq

Which is more effective for weight loss: Orlistat or Mounjaro?
Clinical trials show Mounjaro produces substantially greater weight reduction, with patients achieving up to 22.5% body weight loss compared to Orlistat's 5-10% reduction. However, effectiveness depends on individual medical suitability, adherence, and lifestyle factors assessed by your UK prescriber.
Can I take Orlistat and Mounjaro together?
No, these medications are not prescribed together due to different mechanisms and monitoring requirements. Your prescriber will recommend the single most appropriate treatment based on your clinical assessment, or may suggest sequential use if clinically beneficial.
How much does Orlistat cost compared to Mounjaro at Cured Pharmacy?
Orlistat starts from £135.00 per month, whilst Mounjaro starts from £124.99 per month. Both include free UK prescriber consultation, and new patients save £20 with code WEIGHTLOSSNEW.
Do I need a prescription for Orlistat or Mounjaro in the UK?
Yes, both are prescription-only medications requiring clinical assessment by a UK-registered prescriber. Cured Pharmacy provides free online consultation as part of every treatment request, with prescriber review completed within hours.
What are the main side effects of Orlistat vs Mounjaro?
Orlistat commonly causes oily stools, flatulence, and faecal urgency related to fat malabsorption. Mounjaro typically causes nausea, diarrhoea, and decreased appetite during dose escalation, which usually improve with continued use.
How quickly will I see results with Orlistat vs Mounjaro?
Orlistat produces gradual weight loss visible within 2-4 weeks of consistent use. Mounjaro typically shows appetite reduction within two weeks and measurable weight loss by week 4, with optimal results developing over 6-12 months as you reach maintenance dosing.
Is Mounjaro suitable if Orlistat didn't work for me?
Many patients achieve substantial weight loss with Mounjaro after limited success with Orlistat, due to its more potent dual-hormone mechanism. Your UK prescriber will assess whether transitioning to Mounjaro is clinically appropriate based on your previous treatment response and current medical status.
Are there alternatives to Orlistat and Mounjaro at Cured Pharmacy?
Yes, we offer Wegovy (semaglutide) from £135.00 and Saxenda (liraglutide) from £135.00 as additional GLP-1 options, plus lower-dose Orlistat formulations including Alli. Your prescriber will recommend the most suitable treatment during your free clinical assessment.
Is Mounjaro more effective than Orlistat for weight loss in the UK?
Clinical studies show Mounjaro typically delivers greater weight loss results than Orlistat, with patients losing an average of 15-20% body weight compared to 5-10% with Orlistat. Cured Pharmacy offers consultations to help you choose the most suitable option based on your health profile and weight loss goals.
How does the cost of Orlistat compare to Mounjaro UK prices?
Orlistat is generally cheaper upfront, typically costing £20-40 per month, while Mounjaro starts from £124.99 monthly at Cured Pharmacy. However, Mounjaro's superior efficacy may provide better value long-term, and you can save £20 off your first Mounjaro order with code Weightlossnew.
Can I switch from Orlistat to Mounjaro through Cured Pharmacy?
Yes, many patients switch from Orlistat to Mounjaro for enhanced weight loss results. Cured Pharmacy's UK-registered prescribers will review your medical history and current treatment during your online consultation to ensure Mounjaro is safe and appropriate for you.
What are the main differences between taking Orlistat vs Mounjaro UK?
Orlistat is taken as a capsule three times daily with meals and works by blocking fat absorption, while Mounjaro is a once-weekly injection that reduces appetite and regulates blood sugar. Cured Pharmacy provides full guidance on administration and lifestyle support for whichever treatment you choose.
Do I need different prescriptions for Orlistat and Mounjaro in the UK?
Yes, Orlistat and Mounjaro require separate prescriptions as they are different medications with distinct mechanisms of action. Cured Pharmacy's online consultation service allows you to discuss both options with UK-registered prescribers who will determine the most suitable treatment for your weight loss journey.
Tarun Kumar, Prescribing Pharmacist

Medically reviewed by

Tarun Kumar, Prescribing Pharmacist (GPhC 2233073)

Reviewed on: June 03, 2026

Last reviewed: 13 August 2026

Last updated on 13 August 2026.

Review History

Our experts continually monitor new findings in health and medicine, and we update our articles when new information becomes available.

Why this page was updated on 13 August 2026

Content checked and updated as part of our periodic review, to ensure accuracy and currentness.

Current version (13 August 2026)

Edited by: The Editorial Team

Medically reviewed by:

Tarun Kumar, GPhC No. 2233073, Prescribing Pharmacist


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