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Mounjaro (Tirzepatide) Injections

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Mounjaro (tirzepatide) is the latest "dual-action" weight loss injection. Clinical trials (SURMOUNT-1) show it helps patients lose up to 22.5% of their body weight by targeting the hormones that control appetite and blood sugar.

Mounjaro is a cold-chain medication and must be stored in the fridge (2°C to 8°C). It can be kept out of the fridge for up to 21 days, provided the temperature stays below 30°C.

From £147.99* per pen (4 doses).

Also available: Wegovy and Saxenda.

Stock Update: High demand expected. If your order shows 'on-hold', we are securing your fresh stock allocation.
  • Effective: Superior weight loss results vs Wegovy.
  • Convenient: Once-weekly injection pen.
  • Safe: Includes free FitXpress body scan verification.
  • Fast: Cold-chain, temperature-controlled shipping.
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More information

Mounjaro for Weight Loss and Type 2 Diabetes: A Doctor’s Explanation

Dr Shane Charles (MBBS, MRCS, PgDip SEM) - GMC Number 8085739

GP and surgeon Dr Shane Charles (MBBS, MRCS, PgDip SEM) explains that "Mounjaro (tirzepatide) is a prescription medicine used to treat type 2 diabetes and can also be prescribed to support weight loss. It works by activating GLP-1 and GIP receptors, which are natural hormones that help control appetite and blood sugar".

If you feel this treatment may be suitable for you, you can begin an online consultation. A registered prescriber will review your information and decide whether it is clinically appropriate. If prescribed, your medication can be delivered straight to your home.

Why Choose UK Meds?

Order Mounjaro online from a fully regulated UK prescription service that prioritises safety, speed and discretion.

  • Proven Results: Clinical trials show up to 22.5% weight loss.
  • Fast Access: Online consultation with no GP visit required.
  • Safety First: Free FitXpress body scan included to ensure clinical safety.
  • Genuine Stock: Sourced directly from UK-licensed wholesalers and shipped in cold-chain packaging.

Meet the Mounjaro KwikPen

Mounjaro Kwikpen overview - Weekly dosage, easy-to-use pre-filled pen, lasts 1 month

Mounjaro Price and Dosage Guide

Mounjaro prices start from £147.99 per month. The cost depends on the dosage strength prescribed. Each KwikPen contains 4 weekly doses (one month's supply).

Current Mounjaro UK Price List
Dosage StrengthPrice (Per Pen)Treatment Phase
2.5 mg (4 doses)£147.99Month 1 (Initiation)
5 mg (4 doses)£194.99Month 2
7.5 mg (4 doses)£244.99Step-up Dose
10 mg (4 doses)£274.99Step-up Dose
12.5 mg (4 doses)£294.99Step-up Dose
15 mg (4 doses)£299.99Maintenance Dose
Why have Mounjaro prices changed?

The manufacturer, Eli Lilly, recently increased the supply cost of Mounjaro to UK providers. UK Meds has absorbed as much of this cost as possible. If you placed an order before the increase with allocated stock, your original price will be honoured.

Standard Titration Schedule

You will typically start on the lowest dose and increase every 4 weeks to help your body adjust to the medication.

WeeksDosePurpose
1–42.5 mgStarter dose to adjust body
5–85 mgFirst therapeutic dose
9+7.5 mg - 15 mgIncreases based on results & side effects

What is Mounjaro and How Does it Work?

Mounjaro (active ingredient tirzepatide) is a "dual agonist" injection used for weight loss and type-2 diabetes. While other medicines target a single hormone, Mounjaro mimics two naturally occurring hormones: GLP-1 and GIP.

Mechanism of Action

  • Suppresses Appetite: Signals the brain to reduce hunger and "food noise".
  • Slows Digestion: Keeps you feeling full for longer after meals.
  • Balances Blood Sugar: Improving insulin sensitivity helps prevent sugar spikes that trigger cravings.

Studies like Nauck & D'Alessio (2022) suggest this dual action makes Mounjaro more effective than single-hormone treatments like Wegovy or Ozempic.

Clinical Results

In the SURMOUNT-1 clinical trial, participants on the highest dose lost an average of 22.5% of their body weight over 72 weeks. Most users notice appetite suppression within the first 4 weeks.

Who is Eligible? (BMI Requirements)

Eligibility Criteria To Buy Mounjaro In The UK including BMI chart

To buy Mounjaro in the UK, you must meet specific Body Mass Index (BMI) criteria:

  • BMI 30+: Suitable for obesity management.
  • BMI 27+: Suitable if you also have a weight-related condition (e.g., prediabetes, high blood pressure, high cholesterol).

Unsure if you qualify? Read our Beginner's Guide to Mounjaro.

FitXpress: Faster Approval with Safety Scans

We use FitXpress, an AI-assisted tool, to verify your BMI instantly. This removes the need for a GP referral and speeds up your order dispatch.

Tips for a successful scan:

  • Wear tight-fitting clothes (or activewear).
  • Stand against a plain, light-coloured wall.
  • Ensure the room is well-lit.
  • Use the "A" pose (arms slightly away from body) for the front photo.

Important Safety Warnings

Mounjaro is not suitable for everyone. Do not use this medicine if:

  • You have a personal or family history of medullary thyroid carcinoma (MTC) or Multiple Endocrine Neoplasia type 2 (MEN 2).
  • You are pregnant, breastfeeding, or planning to conceive (stop Mounjaro at least 1 month before trying for a baby).
  • You have a history of pancreatitis.
  • You have severe digestive problems, such as gastroparesis.
  • You have Type 1 diabetes.

Diabetic Retinopathy: Tell your prescriber if you have eye problems, as rapid blood sugar changes can temporarily affect vision.

Practical Guide: Using & Storing Mounjaro

Correct use is vital for your safety and results. Mounjaro is a once-weekly injection. For full instructions, read our guide on How to Take Mounjaro.

How to Inject

Inject into the fatty tissue just under the skin (subcutaneous). Rotate your injection site every week to avoid soreness.

Diagram showing Mounjaro injection sites: Stomach, Thighs, Upper Arms

Best Injection Sites:

  • Stomach: Keep 5cm away from your belly button.
  • Thighs: The front of your thighs.
  • Upper Arms: The back of the arm (best if someone helps you).

Watch our video guide:

Storage and Expiry

  • Before Use: Store in the fridge (2°C to 8°C). Do not freeze.
  • In Use: Can be kept out of the fridge (below 30°C) for up to 21 days.

Warning: Each pen contains 4 doses. Do not attempt to extract a "5th dose" from the pen, as this carries significant safety and infection risks. Read more about why you should not use a fifth dose.

What if I Miss a Dose?

  • < 4 Days Late: Take the missed dose immediately.
  • > 4 Days Late: Skip it. Take your next dose on your normal scheduled day.
  • Warning: Never take two doses within 3 days (72 hours).

Side Effects and Safety

Monalisa Kapinga - Pharmacist and Clinical Safety Officer - GPhC Number 2232744

Independent pharmacist and Clinical Safety Officer Monalisa Kapinga explains the most common side effects and how to manage them:

"Mounjaro may cause digestive, metabolic and general side effects, especially during the early weeks of treatment. Nausea, vomiting, diarrhoea or constipation are among the most common changes. Eating smaller meals, avoiding rich or spicy foods and staying hydrated can help. Burping or stomach discomfort may improve by eating slowly and avoiding fizzy drinks.

Seek urgent medical help if you experience signs of gallbladder issues, severe abdominal pain or vomiting, which may indicate pancreatitis. A rash, swelling of the face, lips or tongue, or breathing difficulty may suggest an allergic reaction. Stop Mounjaro and seek emergency care if this happens."

Common Side Effects

Most side effects are mild and improve as your body adjusts.

  • Nausea: Very common. Sip water and eat bland foods.
  • Digestive changes: Diarrhoea or constipation. Increase fibre intake gradually.
  • Fatigue: Feeling tired or dizzy.

For full safety details, refer to the Patient Information Leaflet (PIL). You can also read more on our blog: How long do Mounjaro side effects last?

Alternative Weight Loss Treatments

While Mounjaro is highly effective, we also prescribe other licensed treatments. Wegovy (semaglutide) and Saxenda (liraglutide) are popular alternatives. Ozempic is also available for type-2 diabetes management.

Weight Loss Treatment Comparison
FeatureMounjaroWegovySaxendaOrlistat
FrequencyWeekly InjectionWeekly InjectionDaily InjectionDaily Pill (With meals)
Clinical Efficacy*High (up to 22.5%)High (up to 15%)ModerateModerate
Active IngredientTirzepatideSemaglutideLiraglutideOrlistat

*Efficacy percentages refer to maximum weight loss observed in clinical trials.

Switching Medicines: If switching from Wegovy to Mounjaro, you must leave a 7-day washout period between your last dose of Wegovy and your first dose of Mounjaro. Read our full switching guide here.

Frequently Asked Questions

Dr David Nkamare - GMC Number 7868554

UK Meds spoke with Dr David Nkamare to address the most common questions people have about Mounjaro for weight loss. You can read the full conversation here: Doctor Answers Your Questions About Mounjaro.

Is it legal to buy Mounjaro online in the UK?

Yes, provided you use a registered service like UK Meds. Our prescribers review every order. If approved, we issue a private prescription (included in the cost) and dispense the medication from our GPhC-registered pharmacy.

Can I drink alcohol on Mounjaro?

Alcohol does not directly interact with tirzepatide, but it can lower blood sugar and worsen nausea. It is best to limit intake, especially when you first start treatment. Read more: Can you drink alcohol on Mounjaro?

Does Mounjaro affect the contraceptive pill?

Because Mounjaro slows stomach emptying, it might affect how oral contraceptives are absorbed. It is recommended to use an additional barrier method of contraception (like condoms) for 4 weeks after starting Mounjaro and for 4 weeks after each dose increase.

Delivery & Shipping Information

Mounjaro is a temperature-sensitive medication. We use cold-chain packaging with ice packs to ensure it arrives within the safe range (2°C - 8°C).

MethodCostCut-off Time
Next-Day Delivery£4.95Order by 2:30pm (Mon-Thu)
DPD Next-Day (Pre-12pm)£9.95Priority Morning Slot
Friday Orders-Dispatch on Monday (unless Saturday delivery is selected at checkout).

Important Delivery Rules:

  • Sign on Receipt: Someone must be available to accept the package. Missed cold-chain deliveries cannot be re-sent or refunded due to spoilage risks.
  • Thursday Orders: Orders placed after 2:30pm on Thursday will likely be dispatched the following Monday to avoid sitting in a depot over the weekend.

Start Your Journey

Ready to order? The process is simple:

  1. Complete the online consultation.
  2. Submit your FitXpress safety photos.
  3. Receive your Mounjaro via next-day cold-chain delivery.

Start Consultation

UK Meds Mounjaro Resource Hub

Sources & Medical References

Our Commitment to Content Accuracy

UK Meds is committed to providing clear, accurate and up-to-date medical information in line with our Editorial Policy and Content Policy. All content is regularly reviewed to help you make informed decisions before starting a consultation with a registered prescriber.

Medical Disclaimer: The information on this page is not a substitute for medical advice. Always speak to a doctor, pharmacist or healthcare professional before beginning any treatment or making changes to your health routine.

Page Last Updated: 27th November 2025

Author

Content author

Scott Weaver

Medical Content Writer • Bachelor of Arts Degree

Scott is an experienced, skilled medical content writer dedicated to creating helpful and accessible health and wellbeing content for UK Meds.

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Medically Reviewed By:

Medically Reviewed By:

Alexis Missick

General Practitioner (GP) • MBChB

With over a decade of experience in the NHS and six years internationally, Alexis is a seasoned General Practitioner hailing from Turks and Caicos.

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