Wegovy vs Mounjaro UK: Which Works Best? | Cured Pharmacy

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Wegovy vs Mounjaro UK: Complete Comparison Guide

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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 £135.00

£36.25 / 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 £169.00

£44.75 / 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 £210.00

£55.00 / 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 £235.00

£61.25 / 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 £260.00

£67.50 / 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 £277.00

£71.75 / 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 £79.00

£22.25 / 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

£109 £99.00

£27.25 / Per Week

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

⭐ Future Orders at £109
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Wegovy (Semaglutide)
Weeks 9–12

1mg

1 pen • 4 Weeks

£119 £109.00

£29.75 / 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 £159.00

£42.25 / 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 £189.00

£49.75 / Per Week

Maximum dose – the highest available strength for optimal weight management

⭐ Future Orders at £199
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Wegovy vs Mounjaro UK: Complete Comparison Guide

Choosing between wegovy vs mounjaro uk comparison options requires understanding the clinical differences between these two leading weight loss injections. Both are licensed by the MHRA for weight management in the UK, but they work through distinct mechanisms and produce different results in clinical trials. At Cured Pharmacy, our UK-registered clinical team helps patients navigate this decision with transparent pricing and expert guidance.

How Mounjaro and Wegovy Work Differently

Mounjaro contains tirzepatide, the first dual GIP/GLP-1 receptor agonist licensed in the UK, whilst Wegovy contains semaglutide, a GLP-1 receptor agonist [1]. This fundamental difference in mechanism explains why clinical trial results vary between the two medications.

GLP-1 receptor agonists like semaglutide work by mimicking a single gut hormone that regulates appetite and blood sugar. Tirzepatide activates both GLP-1 and GIP receptors simultaneously, producing enhanced metabolic effects [1]. In practical terms, this dual action may lead to greater weight reduction in some patients, though individual responses vary significantly.

Both medications slow gastric emptying, reduce appetite, and improve insulin sensitivity. They're administered as once-weekly subcutaneous injections using pre-filled pens. Your UK prescriber will determine which mechanism better suits your medical history and weight management goals during your clinical assessment.

Clinical Trial Results: Wegovy vs Mounjaro UK Efficacy

The SURMOUNT-1 trial demonstrated that patients taking the highest Mounjaro dose (15mg) achieved an average 22.5% body weight reduction over 72 weeks [1]. In comparison, the STEP-1 trial showed Wegovy users lost an average of 14.9% of their body weight over 68 weeks [2].

These figures represent averages from controlled clinical trials. Individual results depend on numerous factors including baseline weight, adherence to treatment, lifestyle modifications, and metabolic response. Some patients respond better to semaglutide's single-pathway approach, whilst others benefit more from tirzepatide's dual mechanism [1][2].

Both medications require gradual dose escalation to minimise gastrointestinal side effects. Mounjaro typically starts at 2.5mg weekly, increasing to a maintenance dose between 5mg and 15mg. Wegovy begins at 0.25mg, escalating to a maintenance dose of 2.4mg weekly [3]. Your prescriber will tailor the escalation schedule to your tolerance and clinical response.

Time to Results

Most patients notice appetite reduction within the first week of either treatment, though measurable weight loss typically becomes apparent after 4-8 weeks [1][2]. Maximum effects generally occur after 6-12 months of continuous treatment at maintenance doses. Clinical trials measured outcomes over 68-72 weeks, demonstrating sustained weight reduction when combined with lifestyle interventions [1][2].

Side Effects: Comparing Mounjaro and Wegovy

Both medications share similar side effect profiles because they affect GLP-1 receptors. The most common adverse effects include nausea, diarrhoea, vomiting, constipation, and abdominal discomfort [3][4]. These gastrointestinal symptoms typically diminish after the first 4-8 weeks as your body adjusts to treatment.

In the SURMOUNT-1 trial, 81% of Mounjaro users experienced at least one gastrointestinal side effect, compared to 80% of Wegovy users in STEP-1 [1][2]. The frequency is comparable, though some patients report different tolerability between the two medications. Dose escalation protocols are specifically designed to minimise these effects.

Serious but rare side effects include pancreatitis, gallbladder disease, and thyroid C-cell tumours (observed in rodent studies but not confirmed in humans) [3][4]. Both medications carry a boxed warning regarding thyroid tumours and are contraindicated in patients with personal or family history of medullary thyroid carcinoma or Multiple Endocrine Neoplasia syndrome type 2. Your UK prescriber will screen for these contraindications during your assessment.

Managing Side Effects

Eating smaller, more frequent meals and avoiding high-fat foods can reduce nausea and gastrointestinal discomfort. Staying well-hydrated helps prevent constipation. If side effects persist beyond 8 weeks or become severe, contact your prescriber to discuss dose adjustment or alternative treatments. Never increase your dose faster than prescribed, as this significantly increases side effect risk.

Feature Mounjaro (Tirzepatide) Wegovy (Semaglutide)
Mechanism Dual GIP/GLP-1 receptor agonist GLP-1 receptor agonist
Average weight loss Up to 22.5% over 72 weeks Up to 14.9% over 68 weeks
Injection frequency Once weekly Once weekly
Starting dose 2.5mg weekly 0.25mg weekly
Maintenance dose 5mg to 15mg weekly 2.4mg weekly
Starting price at Cured Pharmacy From £145 From £89
Common side effects Nausea, diarrhoea, vomiting Nausea, diarrhoea, vomiting
MHRA licensed Yes Yes

Wegovy vs Mounjaro UK: Cost and Availability

At Cured Pharmacy, Mounjaro starts from £135.00 for genuine UK-licensed pens, whilst other weight loss treatments are available at competitive UK pricing [5]. Final costs depend on your prescribed dose and treatment duration, which your UK prescriber determines during your free online consultation.

Both medications require ongoing treatment to maintain weight loss. Clinical trials show that discontinuing either medication typically results in weight regain [1][2]. Most patients require 12-24 months of continuous treatment to achieve and stabilise their weight management goals, though individual timelines vary considerably.

Cured Pharmacy offers transparent upfront pricing before you complete your clinical assessment. There are no hidden consultation fees, and all prices include UK prescriber review, genuine MHRA-licensed medication, and discreet delivery. Our superintendent pharmacist Tarun Kumar (GPhC 2233073) ensures every prescription meets UK regulatory standards.

Who Can Use Mounjaro or Wegovy in the UK

NICE guidelines recommend GLP-1 receptor agonists for weight management in adults with a BMI of 30 kg/m² or above, or 27 kg/m² with at least one weight-related comorbidity such as type 2 diabetes, hypertension, or obstructive sleep apnoea [6]. Your UK prescriber will calculate your BMI and assess your medical history during consultation.

Both medications are contraindicated in pregnancy, breastfeeding, and patients under 18 years. They should not be used alongside other GLP-1 receptor agonists or if you have a personal or family history of medullary thyroid carcinoma [3][4]. Patients with severe gastrointestinal disease, diabetic retinopathy, or history of pancreatitis require careful evaluation before treatment.

Your online assessment at Cured Pharmacy takes under 3 minutes and covers your medical history, current medications, and weight management goals. A UK-registered prescriber reviews every application individually. If either Mounjaro or Wegovy is unsuitable, alternative treatments like Saxenda or Orlistat may be recommended based on your clinical profile.

Combination with Other Treatments

Neither Mounjaro nor Wegovy should be combined with other GLP-1 receptor agonists or weight loss medications without explicit prescriber approval. They can generally be used alongside most common medications for blood pressure, cholesterol, and other chronic conditions, though dose adjustments may be necessary. Always disclose all current medications during your clinical assessment to avoid potential interactions [3][4].

Making Your Choice: Wegovy vs Mounjaro UK

Clinical trial data suggests Mounjaro may produce greater average weight loss due to its dual receptor mechanism, but individual response varies significantly [1][2]. Some patients achieve excellent results with Wegovy's single-pathway approach, particularly if they've previously responded well to other GLP-1 treatments.

Practical considerations include injection frequency (both are once-weekly), pen design preferences, and individual tolerability. Both medications require similar lifestyle modifications including reduced calorie intake and increased physical activity for optimal results [6]. Your prescriber may recommend starting with one medication and switching if response is inadequate after 12-16 weeks.

At Cured Pharmacy, our UK clinical team provides personalised recommendations based on your medical history, previous treatment responses, and individual circumstances. Start your free online consultation to discuss whether Mounjaro or Wegovy better suits your weight management journey. All treatments are dispensed by our GPhC-registered pharmacy (9012511) with discreet packaging and reliable UK delivery.

Scientific References

  1. 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
  2. Wilding, J. P. H., et al. (2021). Once-Weekly Semaglutide in Adults with Overweight or Obesity. New England Journal of Medicine, 384(11), 989–1002. https://doi.org/10.1056/NEJMoa2032183
  3. Medicines and Healthcare products Regulatory Agency. (2023). Mounjaro 2.5 mg solution for injection in pre-filled pen: Summary of Product Characteristics. MHRA. https://products.mhra.gov.uk/
  4. Medicines and Healthcare products Regulatory Agency. (2023). Wegovy 2.4 mg solution for injection in pre-filled pen: Summary of Product Characteristics. MHRA. https://products.mhra.gov.uk/
  5. Cured Pharmacy. (2025). Weight Loss Treatment Pricing. Cured Pharmacy. https://curedpharmacy.com/collections/weight-loss
  6. National Institute for Health and Care Excellence. (2023). Obesity: identification, assessment and management (CG189). NICE. https://www.nice.org.uk/guidance/cg189

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. Individual results may vary. Weight loss medications work best when combined with a reduced-calorie diet and increased physical activity.

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Faq

Which is better for weight loss, Wegovy or Mounjaro?
Clinical trials show Mounjaro users achieved an average 22.5% weight reduction compared to 14.9% with Wegovy, though individual responses vary significantly. Your UK prescriber will recommend the most suitable option based on your medical history and treatment goals.
Can I switch from Wegovy to Mounjaro or vice versa?
Yes, switching between treatments is possible under prescriber supervision. Your UK clinician will determine appropriate timing and dosing if your current medication isn't producing adequate results after 12-16 weeks.
How much does Mounjaro cost compared to Wegovy in the UK?
At Cured Pharmacy, Mounjaro starts from £135.00 and Wegovy from £135.00. Final costs depend on your prescribed dose and treatment duration, determined during your free clinical assessment.
Do Wegovy and Mounjaro have the same side effects?
Both medications share similar gastrointestinal side effects including nausea, diarrhoea, and vomiting, affecting approximately 80% of users initially. These symptoms typically diminish within 4-8 weeks as your body adjusts to treatment.
How long does it take to see results with Wegovy vs Mounjaro?
Most patients notice appetite reduction within the first week of either treatment. Measurable weight loss typically becomes apparent after 4-8 weeks, with maximum effects occurring after 6-12 months at maintenance doses.
Can I buy Mounjaro or Wegovy without a prescription in the UK?
No, both medications are prescription-only in the UK and require clinical assessment by a UK-registered prescriber. Cured Pharmacy provides a free online consultation that takes under 3 minutes to complete.
Which medication has fewer side effects, Wegovy or Mounjaro?
Both medications have comparable side effect profiles, with approximately 80% of users experiencing gastrointestinal symptoms initially. Individual tolerability varies, and some patients find one medication easier to tolerate than the other.
Is Mounjaro or Wegovy available on the NHS?
Availability through NHS varies by region and clinical commissioning group guidelines. Both medications may be prescribed privately through UK-registered online pharmacies like Cured Pharmacy following clinical assessment by a UK prescriber.