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Mounjaro (Tirzepatide) Injections

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Mounjaro is a revolutionary weekly self-injectable pen for weight loss. It contains tirzepatide which helps to regulate blood sugar levels and reduce appetite to aid an individual's weight loss journey. In clinical trials, participants have noticed around 20% of body weight reduction over an 18-month period. A Mounjaro injection is a safe and effective solution for adults seeking to manage their weight, treat type 2 diabetes, and improve their overall health. Mounjaro is a cold chain medication, meaning it needs to be stored in a fridge between 2°C to 8°C. It can be stored out of a fridge for up to 21 days as long as it is being stored below room temperature (30ºC).

We also offer the alternative weight loss treatments Wegovy (Semaglutide) and Saxenda (Liraglutide) and the alternative diabetes treatment Ozempic (Semaglutide).

If your order is placed on a Friday, you will be offered Saturday delivery at checkout. Orders placed after the cut-off time on Friday will be processed on Monday and delivered on Tuesday. As this product requires refrigeration, we take extra care to ensure it arrives safely and in suitable condition. Thank you for your understanding.

As Mounjaro (Tirzepatide) is required to be kept chilled, your order will be sent with ice packs and a temperature-controlled pouch. The delivery must be accepted on the first delivery attempt. UK Meds are not liable for any deliveries missed or address errors. We are only able to provide next-day delivery for Mounjaro. This is due to the refrigeration requirements of this medication.

  • Effectiveness: Avg. ~22% weight loss*
  • Dose: One weekly single dose (One pen per month)
  • Contains Tirzepatide
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A Doctor's Take On Mounjaro As Treatment For Weight Loss

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

GP and surgeon, Dr Shane Charles (MBBS, MRCS, PgDip SEM) provides a simple explanation of the medication below:

'Mounjaro (Tirzepatide) is a medication used for the treatment of Type 2 diabetes mellitus (T2DM), and can also be used as a weight loss treatment. It works by increasing the effects of the glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) receptors'.

If you think this is a treatment that can help you, start an online consultation now for a registered prescriber to review. If treatment is deemed suitable, they can prescribe it, and we can deliver it to you from the comfort of your own home with a range of convenient delivery and payment options for you to choose from. If you have any questions about a medication, you should always consult your doctor with any questions prior to starting treatment, to ensure that it is safe and suitable for you.

Buy Mounjaro (Tirzepatide) Online in the UK

IN STOCK NOW: Available in 2.5mg, 5mg, 7.5mg, 10mg, 12.5mg, and 15mg doses

Buy Mounjaro in the UK: Get started with you online consultation at UK Meds todayThe Different Strengths of Mounjaro 2.5mg, 5mg, 7.5mg, 10mg, 12.5mg, 15mg

How to Order Mounjaro Online in the UK

You can buy Mounjaro online in the UK through UK Meds with a valid UK prescription. To get started, simply fill out a free online consultation. A registered prescriber will review your BMI, medical history, and any current medications to check if Mounjaro (tirzepatide) is right for you.

How it Works:

  1. Complete a health consultation - Answer a few quick questions online about your health.
  2. Get a free private prescription - If approved, you’ll be able to place your order safely and securely.

Next-day delivery is available thanks to special cold-chain packaging that keeps your medicine at the right temperature.

Need more details before starting the GLP-1/GIP dual-agonist treatment? Read our full UK guide to buying Mounjaro.

Can I Get a Private Prescription for Mounjaro?

Yes, if you don’t qualify for weight loss treatment on the NHS, you can get a private Mounjaro prescription through UK Meds. After your online consultation, a qualified prescriber will check if it’s safe and suitable for you. If approved, your prescription is issued for free and you can order Mounjaro online for home delivery.

Is It Legal to Buy Mounjaro Online?

Yes, it’s legal to get a private Mounjaro prescription in the UK. The NHS only offers it to certain patients, for example, those with a BMI over 40 and other health risks. Private services offer a quicker and more flexible option for people who want to manage their weight with professional medical support.

As of 23 March 2025, the NHS now restricts Mounjaro to specialist weight management clinics. With private care, you get faster access to treatment, with every order reviewed by a registered healthcare professional.

Why Choose UK Meds?

  • Free online consultation - no GP appointment needed
  • Next-day delivery in refrigerated packaging
  • Genuine Mounjaro from UK-registered pharmacies
  • Secure, discreet, and trusted service

Whether you want to buy Mounjaro in the UK, order tirzepatide online, or explore safe private weight loss injections, UK Meds offers a legal, convenient, and fast way to get started.

Delivery Options

Choose the Best Delivery Options

Decide on the best discreet delivery option for your order below.

Delivery MethodPriceDescription
Standard Delivery

£2.95 (or FREE with orders over £49.99)

Royal Mail Tracked 48. Delivery in 3-4 working days.
Next-Day Delivery

£4.95

Delivered the next day. Monday to Saturday, if ordered before 2:30pm via Yodel. Royal Mail Tracked 24 also available.
DPD Saturday Delivery

£9.95

Delivery on a Saturday. 
DPD Next-Day Before 12pm£9.95Delivery before 12pm (only on weekdays) if ordered before 2.30pm.
DPD Standard Delivery£5.95Your order delivered in 1-3 working days. Deliveries Monday-Friday.
DPD Next-Day Delivery£6.95Delivery in the UK before close of business the following working day, if ordered before 2.30pm.

Please note: Delivery options and pricing are subject to change. For the latest information on UK Meds delivery options please visit our delivery page to learn more. You can also read our other policies including our returns process.

Mounjaro UK Pricing

Looking to buy Mounjaro in the UK? Below is a guide to current prices for the Mounjaro KwikPen across all available strengths. Each pen contains four weekly doses and is priced based on the dosage prescribed as part of your treatment plan.

The cost per pen starts from £134.99* / month. If titrating all the way up to the maximum dose and maintaining, the annual cost is £1,934.60.

How Much Does Mounjaro Cost?

Mounjaro Doses and Prices
DosagePrice (per pen)Typical Use in Treatment PlanPrice per Dose
1 Pen - 4 x 2.5mg doses£134.99Usually started for the first 4 weeks under prescriber supervision£33.75
1 Pen - 4 x 5mg doses£134.99Typically used in the second month if well tolerated£33.75
1 Pen - 4 x 7.5mg doses£149.99May be used as part of the gradual dose increase£37.50
1 Pen - 4 x 10mg doses£154.99Used if prescribed based on response and tolerability£38.75
1 Pen - 4 x 12.5mg doses£169.99Sometimes prescribed before reaching the maximum dose£42.50
1 Pen - 4 x 15mg doses£169.95Often used as a maintenance dose if clinically appropriate£42.49

One pen contains four doses, so a pen lasts for 4 weeks.

Please note: Pricing is subject to change. For the latest information please refer to the consultation section at the top of the product information page.

Patient Information Leaflet

For more information on this prescription medication patients should refer to the Mounjaro patient information leaflet.

What Do People in the UK Say About Mounjaro?

People using Mounjaro (tirzepatide) in the UK have reported a range of experiences, as responses to weight loss treatments can vary from person to person. What works well for one individual may differ for another based on factors like lifestyle, medical history, and how their body reacts to treatment.

Real Mounjaro Reviews

Curious about how others are getting on? Read our full collection of UK customer reviews and testimonials to see how Mounjaro has helped people on their weight loss journeys.

For broader insights, you can also browse international reviews on trusted platforms such as Drugs.com and WebMD.

Why Results May Vary

Everyone’s weight loss journey is unique. If you're considering Mounjaro, it's best to speak to your GP or a healthcare professional. If prescribed, you can monitor your own results and adjust treatment under medical supervision.

For further inspiration, explore real-life Mounjaro success stories from patients across the UK.

Mounjaro Summary

Condition it treats:Weight loss; Type-2 Diabetes
Type of drug:Dual glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptor agonist
Brand names:Mounjaro
Active ingredient:Tirzepatide
Available strengths:2.5mg, 5mg, 7.5mg, 10mg, 12.5mg, 15mg
Common side effects:Diarrhoea, decreased appetite, nausea, vomiting, indigestion, constipation, stomach pain

Key Facts About Mounjaro

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

What is Mounjaro?

Mounjaro (tirzepatide), pronounced “mown-JAHR-oh”, is a once-weekly injectable medicine used to treat type 2 diabetes and support weight loss. It works by regulating blood sugar, reducing appetite, and curbing cravings—especially when combined with a calorie-controlled diet and regular exercise.

Who Can Use Mounjaro?

Eligibility Criteria To Buy Mounjaro In The UK

Mounjaro is typically prescribed to adults who meet one of the following criteria:

  • Have a BMI of 30 or higher (classified as obese)
  • Have a BMI of 27 or higher and a related health condition such as:
    • Prediabetes
    • High blood pressure
    • High cholesterol
    • Heart disease

Consult a healthcare professional to determine if Mounjaro is suitable for you.

For more information, visit our Beginner's Guide to Mounjaro.

Do You Need a Prescription for Mounjaro?

Yes. Mounjaro is a prescription-only medicine in the UK. You'll need to complete a medical consultation to receive a prescription, whether for type 2 diabetes or weight management. Learn more in our guide: Do You Need a Prescription for Mounjaro?

How Does Mounjaro Work?

Mounjaro contains tirzepatide, a dual-action GLP-1 and GIP receptor agonist. These two naturally occurring gut hormones help regulate blood sugar and appetite:

  • GLP-1 (Glucagon-Like Peptide-1): Reduces hunger and supports blood sugar control.
  • GIP (Glucose-Dependent Insulinotropic Polypeptide): Enhances insulin response and appetite regulation.

How Mounjaro Supports Weight Loss

How Does Mounjaro Work For Weight Loss
  • Regulates blood sugar to reduce cravings and maintain stable energy
  • Suppresses appetite by mimicking fullness hormones
  • Slows digestion to keep you feeling full longer
  • Improves energy balance by working with the brain and fat cells

Its dual-action mechanism makes Mounjaro more effective for weight loss than GLP-1–only treatments like Wegovy and Ozempic (Nauck & D'Alessio, 2022).

How Effective is Mounjaro?

Clinical trials show Mounjaro delivers impressive results when combined with lifestyle changes:

Tirzepatide SURMOUNT-1 Trial - average weight loss of 22.5%
  • Up to 15.7% body weight loss in people with type 2 diabetes (Eli Lilly, 2023)
  • Up to 20% weight loss over 18 months in broader studies (Singh, 2024)
  • Up to 22.5% weight loss in non-diabetic individuals in the SURMOUNT-1 trial (Jastreboff et al., 2022)

Latest Evidence: Wegovy vs Mounjaro

Find out which weight loss injection performed better in the May 2025 head-to-head trial: Mounjaro or Wegovy?

Lose More Weight with Mounjaro®
Illustration of weight loss using GLP-1 injectable treatments showing it is 6 times more effective than diet alone

Studies show Mounjaro is up to 6× more effective than lifestyle changes alone and nearly doubles weight loss compared to other medications. High-dose tirzepatide with lifestyle changes led to:

  • 20.9% weight loss in 36 weeks
  • 25.3% weight loss in 88 weeks (JAMA, 2025)

What if You’re Not Losing Weight on Mounjaro?

Not seeing results? It may be due to inconsistent use, dietary habits, or underlying health conditions. Read our guide: Why Am I Not Losing Weight on Mounjaro?. Always consult your prescriber for advice.

How Long Does Mounjaro Take to Work?

Mounjaro starts working right away, but noticeable improvements in appetite and blood sugar may take a few weeks. For best results, follow your doctor’s guidance and maintain a healthy lifestyle.

Directions

How to Use the Mounjaro Pen

Mounjaro (tirzepatide) is a once-weekly injection used to support weight loss and manage type 2 diabetes. It comes in an easy-to-use prefilled KwikPen. Here's how to take it safely and effectively.

Where and How to Inject

Where to inject Mounjaro on your body - Usage instructions for the Mounjaro KwikPen
  • Stomach (abdomen): Inject at least 5cm away from your belly button.
  • Front of thighs: Suitable for self-injection.
  • Upper arms: Best administered by someone else.

Rotate injection sites weekly to help avoid irritation and improve absorption. Don’t inject into bruised, scarred, or irritated areas.

Step-by-Step: How to Use the KwikPen

  1. Set the dose: Turn the dial to match your prescribed amount.
  2. Inject under the skin: Choose the stomach, thigh or upper arm.
  3. Rotate sites: Use a different spot each week to minimise discomfort.

Watch a real demonstration to see how to use the Mounjaro KwikPen properly.

You can also follow UK Meds' full instructions here.

When to Take Mounjaro

  • Inject once a week, any time of day, with or without food.
  • Stick to the same day each week for consistency.
  • If you need to change the day, wait at least 3 days (72 hours) between doses.

Important: Always follow your prescriber’s advice to ensure Mounjaro is safe and effective for your treatment plan.

How to Store and Dispose of Mounjaro Pens

To keep your Mounjaro (tirzepatide) pens safe and effective, it’s important to follow proper storage and disposal steps. For a detailed overview, see our Mounjaro storage and temperature guide.

Storage Instructions

  • Fridge (recommended): Store between 2°C and 8°C in the original packaging to protect from light.
  • Room temperature: Can be kept below 30°C for up to 21 days. Do not use if left unrefrigerated for longer.
  • Do not freeze: Pens that have been frozen should not be used.

Expiry Information

  • Mounjaro pens have an expiry date printed on the packaging.
  • Do not use after this date, as the medication may no longer be effective.
  • Always check the date before each injection.

How to Dispose of Used Pens

  • Place used pens in a sharps disposal container. These are available from pharmacies or healthcare providers.
  • Do not throw used pens in household or recycling bins.
  • Follow local guidelines for safe medical waste disposal.

Tip: Proper storage and disposal help ensure your treatment stays safe, effective, and environmentally responsible.

What Dosage of Mounjaro Should I Take?

When using Mounjaro (tirzepatide) for weight loss, always follow your healthcare provider’s instructions. The dose is gradually increased over time to help your body adjust and reduce side effects.

Mounjaro Dosage Schedule

Mounjaro is taken once a week. Your prescriber will usually start you on a low dose and increase it gradually, based on how well you respond:

Typical Mounjaro Titration Plan
WeeksDosePurpose
1-42.5 mg weeklyStarter dose to allow your body to adjust
5-85 mg weeklyIncreased if tolerated well
9-127.5 mg weeklyFurther adjusted depending on response
13-1610 mg weeklyChecked for effectiveness
17-2012.5 mg weeklyMay be increased if appropriate
21+15 mg weeklyMaintenance dose if well tolerated

Need more help with your dosing schedule? Visit our Mounjaro Dosing and Titration Guide.

What If You Miss a Dose?

  • Take the missed dose within 4 days (96 hours) of your usual time.
  • If more than 4 days have passed, skip the missed dose and wait for your next scheduled injection.
  • Do not take two doses within three days of each other.

If you’re unsure what to do, speak to your doctor or pharmacist.

How Long Does One Mounjaro Pen Last?

  • Each KwikPen contains four doses – one pen lasts four weeks when used as directed.
  • If kept at room temperature (below 30°C), use within 21 days.

Sticking to your prescribed dose and injection schedule is key to getting the best results with Mounjaro. Always check with your prescriber before making any changes to your treatment plan.

The '5th Dose'

After the fourth dose, you may notice some liquid left in the pen. This is a buffer, not an extra dose, and should not be used. Using a fifth dose could lead to underdosing or overdosing, which may reduce effectiveness or increase side effects. For full details, read our guide on why you should not use a fifth dose of Mounjaro.

Warnings and Precautions

Important Safety Information

Before starting Mounjaro (tirzepatide), it’s important to understand the safety considerations and who may not be suitable for this treatment.

Who Should Be Cautious?

  • Thyroid Cancer Risk: Avoid Mounjaro if you or a close family member has a history of medullary thyroid carcinoma (MTC) or MEN 2 syndrome, due to a possible link between the medication and thyroid tumours.
  • Digestive Conditions: Not recommended for people with gastroparesis, as Mounjaro slows stomach emptying.
  • Pancreatitis: Consult your doctor if you’ve previously had pancreatitis, as this may increase your risk of recurrence.
  • Low Blood Sugar: If you’re taking insulin or sulphonylureas, Mounjaro may cause hypoglycaemia. Regular blood glucose monitoring is advised.
  • Eye Health: Speak to your doctor if you have diabetic retinopathy, as Mounjaro may worsen vision issues in some cases.

Who Can Take Mounjaro?

Mounjaro is licensed for adults (18+) with:

  • A BMI of 30 or above (obesity)
  • A BMI of 27 or above (overweight) with at least one weight-related condition, such as prediabetes, high blood pressure, high cholesterol or heart disease

It should be used alongside a healthy diet and regular exercise for best results.

Who Should Not Take Mounjaro?

Mounjaro is not suitable if you:

  • Are under 18
  • Are pregnant, trying to conceive, or breastfeeding
  • Have severe kidney or liver problems
  • Have type 1 diabetes
  • Are already using another GLP-1 receptor agonist (e.g. Ozempic, Saxenda, Wegovy)
  • Have a history of thyroid cancer (MTC)
  • Have severe digestive issues (such as gastroparesis)
  • Have had pancreatitis
  • Are allergic to tirzepatide or any other ingredients in Mounjaro

Pregnancy and Breastfeeding

  • Pregnancy: Mounjaro is not recommended during pregnancy. Stop use at least one month before trying to conceive.
  • Breastfeeding: It’s not known if Mounjaro passes into breast milk. Speak to your doctor before use.

Medication Interactions

Mounjaro may interact with prescription medicines, over-the-counter drugs, supplements or herbal products. Always inform your doctor about all treatments you're taking.

See the full interaction list on Drugs.com.

Monitoring and Reporting

Mounjaro is under enhanced safety monitoring in the UK. Report any side effects or unusual symptoms to your doctor or through the Yellow Card Scheme (MHRA).

Always read the full Patient Information Leaflet before starting treatment.

Can You Drink Alcohol on Mounjaro?

There are no known direct interactions between Mounjaro and alcohol, but it’s best to limit alcohol intake. Drinking may reduce the medication’s effectiveness and increase the risk of side effects. Learn more in our guide: Can You Drink Alcohol on Mounjaro?

Side Effects

What Are the Side Effects of Mounjaro (Tirzepatide)?

Mounjaro, like all medications, can cause side effects. While most people tolerate it well, others may experience mild or more serious reactions. Always follow medical advice and report anything unusual.

Common Side Effects

These side effects are usually temporary and improve as your body adjusts:

  • Nausea or vomiting
  • Diarrhoea or constipation
  • Fatigue
  • Dizziness or lightheadedness
  • Bloating or gas
  • Gallstones

Tip: Eating smaller meals and staying hydrated can help reduce stomach upset.

Serious Side Effects (Less Common)

  • Pancreatitis: Severe stomach pain that may reach your back, with persistent vomiting.
    Action: Seek urgent medical attention.
  • Severe allergic reaction (anaphylaxis): Swelling of the face, lips or tongue, or difficulty breathing.
    Action: Call 999 or go to A&E.
  • Gallbladder issues: Ongoing stomach pain, jaundice, or fever.
    Action: Contact your GP.
  • Low blood sugar (hypoglycaemia): Especially if taken with insulin or certain diabetes medicines. Symptoms include shaking, sweating, fast heartbeat, or confusion.
    Action: Eat something sugary and seek medical help.
  • Vision changes: Any eyesight issues should be assessed by a healthcare provider.
  • Kidney problems: Especially if dehydrated from vomiting or diarrhoea. Signs include dark urine or reduced urination.
    Action: Stay hydrated and consult a doctor.

What to Do if You Have Side Effects

  • Mild symptoms: Usually settle with rest, fluids, and smaller meals.
  • Severe symptoms: Stop using Mounjaro and seek immediate medical attention.

Reporting Side Effects

Tell your doctor, pharmacist or nurse if you notice anything unusual. You can also report side effects through the MHRA Yellow Card Scheme.

For a full list of side effects, refer to the Patient Inf

Alternative Weight Loss Treatments

If Mounjaro isn’t the right fit, other prescription options are available, including:

Each medicine works differently. Your prescriber can help you choose the most suitable option based on your health and weight loss goals.

Weight Loss Injection Comparison

FeatureWegovySaxendaOrlistatMounjaro
Active IngredientSemaglutideLiraglutideOrlistatTirzepatide
How It WorksAppetite suppressant (GLP-1)Appetite suppressant (GLP-1)Blocks fat absorptionDual-action: GLP-1 and GIP
DosingWeekly injectionDaily injectionOral capsule (up to 3 times daily)Weekly injection
EffectivenessUp to 86.5% lost ≥5% weight67.5% effective after 12 weeks60% lost ≥5% weightUp to 76% lost ≥5% weight
PrescriptionYesYesPrescription (Xenical); OTC (Alli)Yes

Mounjaro Compared to Other Weight Loss Injections

Mounjaro vs Wegovy

  • Ingredients: Tirzepatide (Mounjaro) vs Semaglutide (Wegovy)
  • Mechanism: Mounjaro targets both GLP-1 and GIP hormones, potentially offering added benefit
  • Effectiveness: Both are highly effective, though Wegovy has longer-term safety data available

For a full breakdown, visit our Mounjaro vs Wegovy guide.

Mounjaro vs Saxenda

  • Ingredients: Tirzepatide (Mounjaro) vs Liraglutide (Saxenda)
  • Dosing: Mounjaro is injected once weekly; Saxenda is taken daily
  • Mechanism: Mounjaro’s dual-hormone action may support greater appetite control

Mounjaro vs Ozempic

Ozempic vs Mounjaro - Comparison Table
  • Purpose: Mounjaro is licensed for weight loss in the UK; Ozempic is used for type 2 diabetes
  • Mechanism: Ozempic works via GLP-1 only; Mounjaro targets GLP-1 and GIP

Explore our Mounjaro vs Ozempic comparison for full details.

Switching Between Weight Loss Medications

  • Switching from Wegovy: A 4-week washout is generally advised
  • Switching from Ozempic: Your prescriber can recommend a safe transition plan

Not sure which treatment is right for you? Speak to a registered independent prescriber during your online consultation. You can also find helpful resources on the UK Meds blog.

Our Commitment To Content Accuracy

UK Meds is committed to providing you with the most accurate information possible regarding healthcare and lifestyle, as outlined in our Editorial Policy and Content Policy. We aim to regularly peer review and update our content as necessary to give you the most up-to-date medical information, helping you to be fully informed before starting a consultation with a registered prescriber for the treatment that you need.

Please note that our content is not a substitute for professional medical advice. Before starting any treatment or making any changes that could affect your lifestyle, you should always speak with your doctor, pharmacist or healthcare provider to ensure that it is safe and suitable for you.

Page Last Updated:

15 July 2025

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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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Medical Reviewer

Medical Reviewer

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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