Mounjaro — Lose Up to 22.5% of Your Body Weight

The UK's most effective GLP-1 weight loss treatment. Dual-action tirzepatide, prescribed by our independent pharmacist.

GPhC Registered Pharmacy
MHRA Licensed
UK Independent Prescriber
Discreet Packaging

How This Medication Works

GLP-1 Receptor Action

Tirzepatide activates GLP-1 receptors in your brain, reducing hunger and increasing feelings of fullness. This helps you eat less without conscious effort.

GIP Receptor Action

The GIP component improves glucose regulation and may enhance weight loss further. This dual action makes Mounjaro more effective than single-action medications.

Sustained Results

Weekly injections maintain steady medication levels. Most people begin seeing results within 2 to 4 weeks, with significant changes by 12 weeks.

Clinical Evidence

SURMOUNT-1 Trial

Participants treated with Mounjaro lost an average of 22.5% of their body weight over 72 weeks at the highest dose (15mg). This is the largest documented weight loss from any GLP-1 based medication.

The trial enrolled over 2,500 adults without type 2 diabetes. Results were consistent across age groups and starting weights.

These results represent average outcomes. Individual results may vary. Always discuss expected outcomes with your prescriber before starting treatment.

Dose Escalation Schedule

Weeks 1–4

2.5mg once weekly
Your starting dose. Allows your body to adapt and minimises initial side effects.

Weeks 5–8

5mg once weekly
First escalation. You should notice reduced appetite and increased satiety.

Weeks 9–12

7.5mg once weekly
Continue escalating. Weight loss momentum increases.

Weeks 13–16

10mg once weekly
Higher therapeutic dose. Most people see significant results here.

Weeks 17–20

12.5mg once weekly
Approaching maximum effective dose.

Week 21 Onwards

15mg once weekly (maintenance)
Maximum dose. Continue indefinitely or as prescribed by your pharmacist. Injected subcutaneously (under the skin).

Pricing

Dose Strength Monthly Price
2.5mg £179.99
5mg £199.99
7.5mg £269.99
10mg £269.99
12.5mg £339.99
15mg (maintenance) £349.99
Prices are placeholders and will be confirmed before launch.

Side Effects

Common Side Effects

  • Nausea (most common in weeks 2–4)
  • Diarrhoea
  • Constipation
  • Decreased appetite
  • Mild injection site reactions (redness or itching)
Good news: Most side effects are mild and reduce significantly after the first 4–6 weeks as your body adapts. Nausea is typically the most bothersome symptom, but it improves rapidly. Many patients experience no side effects beyond reduced appetite, which is the intended effect.

Who Is It Suitable For

BMI Requirements

BMI of 30 or higher, or BMI of 27 or higher if you have a weight-related health condition such as type 2 diabetes, high blood pressure, or high cholesterol.

Age

You must be 18 years or older to take Mounjaro for weight loss.

Health Conditions

Mounjaro is suitable if you have no contraindications such as a history of pancreatitis, severe kidney disease, or medullary thyroid cancer. Tell your pharmacist about all your health conditions.

Pregnancy

Mounjaro is not suitable during pregnancy or breastfeeding. If you are pregnant or planning to become pregnant, discuss this with your pharmacist before starting.

Frequently Asked Questions

How do I inject Mounjaro?

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Mounjaro is a subcutaneous injection, meaning you inject it under the skin. Once weekly, you inject 0.5ml of the solution into your abdomen, thigh, or upper arm. We provide full instructions and will walk you through the process. Most people find it painless after the first injection. The needle is very small and the injection takes less than 10 seconds.

What if I miss a dose?

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If you miss your weekly injection by 2 days or less, inject as soon as you remember. If more than 2 days have passed, skip that dose and resume your normal schedule the following week. Do not inject a double dose to make up for a missed one. Contact your pharmacist if you are unsure.

Can I drink alcohol on Mounjaro?

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Moderate alcohol consumption is generally acceptable on Mounjaro. However, alcohol can increase nausea and may affect blood sugar control, especially if you have diabetes. Limit alcohol intake and avoid binge drinking. Always drink with food. Discuss alcohol use with your pharmacist if you have concerns.

How is Mounjaro different from Wegovy?

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Mounjaro contains tirzepatide, a dual GLP-1 and GIP receptor agonist. Wegovy contains semaglutide, a single GLP-1 receptor agonist. Mounjaro produces slightly greater average weight loss (22.5% vs. 20.7%) and may have additional metabolic benefits from the GIP action. Mounjaro has a steeper dose escalation schedule, which can mean faster weight loss but also more initial side effects. Both are effective; the choice depends on your preferences and medical history.

When will I start seeing results?

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Most people notice reduced appetite within 1 to 2 weeks. Visible weight loss typically begins within 2 to 4 weeks, with significant results by 8 to 12 weeks. Individual timelines vary based on starting weight, diet, exercise, and metabolism. The longer you take Mounjaro (especially at higher doses), the more weight you lose. Maximum results usually occur around 16 to 20 weeks.

What happens if I stop taking Mounjaro?

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When you stop Mounjaro, appetite gradually returns over 2 to 4 weeks as the medication leaves your system. Weight regain is possible if diet and exercise habits do not change. Many people continue Mounjaro long-term to maintain weight loss. Discuss your treatment goals with your pharmacist to plan the duration that is right for you.

Check Your Eligibility for Mounjaro

Ready to lose up to 22.5% of your body weight? Our independent pharmacist will assess your medical history and determine whether Mounjaro is right for you.