Mounjaro Weight Loss Injection

(6 customer reviews)

Price range: £149.99 through £899.97

Mounjaro UK – Secure Current Pricing

Mounjaro is a weekly self injectable pen used for weight loss. It contains tirzepatide, which works by regulating blood sugar and energy balance levels to help reduce appetite and prevent cravings. Price match guarantee.

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  • 🇬🇧 UK regulated pharmacy & prescribing clinicians
  • 💸 Start from £37.25 per week
  • ⭐ Trusted by 10,000+ UK patients
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Type of medicine

Prescription injection for weight loss in adults with obesity or excess weight

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Active Ingredient

Tirzepatide – a dual-action GLP-1 and GIP receptor agonist

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Effective within

Results typically seen within 4 to 8 weeks with diet and exercise

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Works by

Reduces appetite, slows digestion, and improves blood sugar control

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Side effects

May cause nausea, tiredness, constipation, or diarrhoea

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Not Suitable For

Not for use in pregnancy or thyroid-related conditions

Cheapest Mounjaro UK – Prices & Options

If you are searching for the cheapest Mounjaro UK, it is important to compare both pricing and clinical support. At The Care Pharmacy, we offer competitive pricing across all dose strengths, with treatment prescribed by qualified UK clinicians following a safe and regulated consultation.

Mounjaro (tirzepatide) is a prescription-only weekly injection designed to support weight loss and blood sugar control. You can learn more about how treatments like Mounjaro are assessed and approved by visiting the NICE guidelines website.

When comparing the cheapest Mounjaro UK, it’s important to ensure you are buying from a regulated provider. Read our guide on where to safely buy Mounjaro online in the UK to understand what to look for.

Mounjaro UK Price Comparison

For the ultimate guide click here.

Dose 1 Pen (4 Doses) 2 Pens (8 Doses) 3 Pens (12 Doses)
2.5mg £149.99 £299.98 £449.97
5mg £184.99 £369.98 £554.97
7.5mg £234.99 £469.98 £704.97
10mg £259.99 £519.98 £779.97
12.5mg £279.99 £559.98 £839.97
15mg £299.99 £599.98 £899.97

What is Mounjaro?

Mounjaro is a weekly self-injectable pen used for weight loss and the management of type 2 diabetes. It contains tirzepatide, which works by regulating blood sugar and energy balance levels to help reduce appetite and prevent cravings.

For patients comparing providers, finding the best Mounjaro UK deal option should always be balanced with safety, clinical oversight, and ongoing support. Treatment is only available following a consultation to ensure it is appropriate for your needs.

  • Once-weekly injection taken on the same day each week
  • Doses increased gradually to minimise side effects
  • Results vary depending on lifestyle and adherence
  • Ongoing clinical monitoring is essential
  • Not suitable for everyone

What is Mounjaro used for?

Mounjaro is prescribed to support both weight management and blood sugar control in adults.

  • Supports weight loss in patients with BMI 30+, or 27+ with related conditions
  • Helps regulate blood sugar in type 2 diabetes
  • Reduces appetite and improves portion control

Many patients searching for the cheapest Mounjaro UK are looking for a long-term solution rather than a quick fix. When combined with diet and exercise, Mounjaro can support sustainable weight loss and improved metabolic health.

How do Mounjaro injections work?

Mounjaro mimics two key hormones, GLP-1 and GIP, which regulate appetite and blood sugar.

    • Triggers insulin release when needed
    • Reduces sugar production in the liver
    • Slows digestion to help you feel fuller for longer

This dual mechanism makes it one of the most effective prescription weight loss treatments currently available in the UK. If you are considering treatment, you can also read our guide on how long Mounjaro takes to work to understand what results to expect.

Medically Reviewed by a UK Superintendent Pharmacist ✅

This content has been medically reviewed by Mohammed Ismail Lakhi (GPhC: 2072815), Superintendent Pharmacist at The Care Pharmacy.

Mohammed Ismail Lakhi is a UK-registered pharmacist responsible for overseeing clinical governance, patient safety, and prescribing standards across The Care Pharmacy. All treatments, including Mounjaro (tirzepatide), are prescribed following a structured clinical assessment to ensure they are safe, appropriate, and in line with UK regulatory guidance.

Our clinical content is regularly reviewed to ensure accuracy, compliance, and alignment with current UK medical guidelines.

6 reviews for Mounjaro Weight Loss Injection

  1. Paul (verified owner)

    Excellent weight loss treatment just a bit pricey

  2. Helen Shinkwin (verified owner)

    The website isn’t very user friendly, however the instant messaging service is brilliant and any problems are sorted quickly, within minutes. Speedy delivery

  3. Princess Yeboah Manu

    Very good

  4. Mrs Emma Cook (verified owner)

    Returned to mounjaro after trying wegovy as although wegovy was cheaper it was less effective. Returned at lowest dose to start again to get last couple of stone off, hopefully without having to go up too many mg

  5. Sian (verified owner)

    Very happy with the service quick easy and received my parcel on time will definitely use again

  6. Alison Timms (verified owner)

    great swift service

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Mounjaro weight loss injections may cause serious side effects, including:

  • Pancreatitis (Inflammation of the pancreas): Stop using Mounjaro and contact your healthcare provider immediately if you experience severe pain in your stomach area that doesn’t go away, with or without vomiting. The pain may also spread to your back.
  • Low blood sugar (Hypoglycaemia): Your risk may increase if you use Mounjaro with medications like insulin or sulfonylureas. Signs include dizziness, sweating, confusion, drowsiness, blurred vision, slurred speech, shakiness, rapid heartbeat, mood changes, and hunger.
  • Serious allergic reactions: Stop using Mounjaro and seek urgent care if you experience swelling of the face, lips, tongue, or throat, difficulty breathing or swallowing, severe rash or itching, fainting, or a very rapid heartbeat.
  • Kidney problems (Kidney failure): If you have existing kidney issues, vomiting and diarrhoea may lead to dehydration, worsening your condition. Stay hydrated to reduce the risk.
  • Severe stomach problems: Some users report serious stomach issues. Inform your healthcare provider if symptoms are severe or persistent.
  • Vision changes: Report any vision changes while using Mounjaro to your healthcare provider.
  • Gallbladder problems: Symptoms may include pain in the upper abdomen, fever, jaundice (yellowing of the skin or eyes), or pale stools. Contact your doctor immediately if you notice these signs.

Common Side Effects

The most common side effects of Mounjaro include:

  • Nausea
  • Diarrhoea
  • Reduced appetite
  • Vomiting
  • Constipation
  • Indigestion
  • Abdominal pain

This is not a full list of side effects. Speak to your healthcare provider if any side effects bother you or do not go away.

How Should Mounjaro Be Stored?

To keep your injections safe and effective:

  • Store pens in the fridge between 2°C and 8°C
  • Can be kept at room temperature (up to 30°C) for a maximum of 21 days
  • Protect from light and never freeze
  • Keep out of sight and reach of children

Always check the expiry date before use.

Who Should Avoid Mounjaro?

Mounjaro weight loss injections may increase the risk of developing thyroid tumours, including thyroid cancer. Although this risk has been identified in animal studies, it is still taken seriously as an important safety warning for patients. You should be aware of symptoms that could indicate a thyroid problem, such as a lump or swelling in your neck, a hoarse voice that does not improve, difficulty swallowing, or shortness of breath. If you notice any of these signs, contact your healthcare provider straight away for urgent advice.

Do not use Mounjaro if you or a family member have ever had a type of thyroid cancer called medullary thyroid carcinoma (MTC). You should also avoid Mounjaro if you have Multiple Endocrine Neoplasia syndrome type 2 (MEN 2). In addition, Mounjaro must not be used if you are allergic to tirzepatide or any of the other ingredients in the injection, as this could cause a serious allergic reaction.

It is important to understand that Mounjaro is not suitable for everyone, and it must only be used following a full clinical assessment. This is because certain health conditions, medications, and risk factors can make treatment unsafe or increase the likelihood of side effects. Always provide accurate medical information during your consultation so the prescribing clinician can make the safest decision for you.

To summarise, not everyone can take Mounjaro. Avoid this treatment if:

  • You have been diagnosed with type 1 diabetes
  • You are pregnant, trying to become pregnant, or breastfeeding
  • You have severe digestive conditions, including gastroparesis (delayed stomach emptying)
  • You have an allergy to tirzepatide or any ingredient listed in the medication
  • You are under 18

You should also speak to a healthcare professional before starting Mounjaro if you have any of the following, as extra caution or monitoring may be needed:

  • A history of pancreatitis
  • Gallbladder problems, including gallstones
  • Significant kidney disease or dehydration risk (especially if you are prone to vomiting)
  • Liver problems
  • Diabetic eye disease (diabetic retinopathy), particularly if your blood sugars may change quickly
  • A history of severe allergic reactions to injectable medicines
  • You take other diabetes medications, especially insulin or sulfonylureas, as your risk of low blood sugar may be higher

As with any prescription weight loss treatment, ongoing monitoring is important. If you experience severe stomach pain, persistent vomiting, signs of dehydration, or any worrying symptoms while using Mounjaro, seek medical advice promptly.

Always check with a healthcare professional before starting treatment to ensure Mounjaro is safe and appropriate for your health needs.

We only stock Mounjaro in a multi-dose pen. This means each pen contains four doses of the same strength. Be sure to follow your doctor’s instructions and the patient information leaflet that comes with your pen.

You should only inject Mounjaro (Tirzepatide) into the skin of your stomach or upper thighs, avoiding veins and muscles. If your upper arms have enough fat, you can inject there, but it’s best to have someone help you.

Use a new needle for each injection. Have a sharps bin nearby so you can safely dispose of the needle after you’re done.

Always check your pen and needle for any damage, and don’t use them if they’re unsealed or bent. Also, inspect the liquid – if it’s not clear and colourless or slightly yellowish, you may need to use a new pen.

Before taking your dose, double-check that you have the correct medication and dose according to the Mounjaro dosing schedule. This is particularly important if you also take other injectable medications like insulin.

Ready to start your weight loss journey? Start a Consultation for Mounjaro Online UK.

Mounjaro Dosage Schedule

Mounjaro contains tirzepatide as its active ingredient. Tirzepatide is a dual-action GLP-1 and GIP receptor agonist that helps regulate blood sugar levels and appetite, supporting effective weight loss and type 2 diabetes management.

In addition to the active ingredient, Mounjaro includes the following inactive ingredients to help stabilise the solution and maintain safety and effectiveness:

  • Metacresol
  • Sodium chloride
  • Sodium phosphate
  • Hydrochloric acid and/or sodium hydroxide (to adjust pH)
  • Water for injections

Mounjaro does not contain preservatives, gluten, or lactose. If you have known allergies to any of these ingredients, please speak with your healthcare provider before starting treatment.

The cheapest Mounjaro in the UK can vary depending on the provider, dose strength, and whether clinical support is included. While price is important, it’s essential to choose a UK-registered pharmacy that offers safe prescribing and ongoing support. At The Care Pharmacy, we provide competitive pricing across all Mounjaro doses alongside a fully regulated consultation process.
You may notice some changes to your appetite or digestion within the first week or two. However, it can take several weeks to see noticeable improvements in blood sugar levels or weight loss. Stick with it, and follow your diet and exercise plan for the best results.
Yes, but only if it's prescribed for weight management. Mounjaro is approved for adults with a BMI of 30 or more, or 27 or more with a weight-related condition. A healthcare professional will assess if it’s the right option for your needs.
If you miss a dose and it’s been less than 4 days (96 hours), take it as soon as possible. If more than 4 days have passed, skip the missed dose and take your next one on your usual day. Never take two doses at once.
No, Mounjaro works best when used alongside healthy lifestyle changes. Eating well and staying active will help maximise results and support your overall health.
Yes, if it continues to be effective and well-tolerated. Your doctor or nurse will monitor your progress and adjust the dose if needed. Don’t stop using it without speaking to a healthcare professional.

Inject Mounjaro subcutaneously (under the skin) in your stomach (abdomen), thigh, or upper arm. Use Mounjaro once a week, at any time of day.

For injecting Mounjaro

Stomach: Choose a spot at least 2 inches away from your belly button. Avoid the waistline and hip bones.

Thigh: Inject into the outer thigh. Do not use the inner thigh.

Back of the Upper Arm: Aim for 3 inches below the shoulder or above the elbow. This area is hard to reach when self-injecting, so it’s better if someone else gives you the injection.

Step-by-Step Guide

Check the Pen

  • Store unused pens in the fridge (2°C to 8°C). After use, they can be kept at room temperature (up to 30°C).
  • Ensure the pen is undamaged, the dose strength and medication name match your prescription, and the pen is not expired.
  • Check for cloudiness or particles. Air bubbles are normal. Do not use if there are any issues.

Wash Your Hands

  • Wash hands thoroughly with soap and water or use antibacterial hand sanitiser before injecting.

Choose Your Injection Site

  • Follow your doctor’s guidance on site selection (stomach or thigh).
  • For the back of the upper arm, seek assistance.
  • Rotate injection sites to avoid repetition.

Prepare the Pen

  • Wipe the inner red seal with a swab.
  • Use a new needle for each injection.
  • Remove the outer needle shield.

Prime the Pen

  • Turn the dose knob until you hear two clicks and '0' is displayed.
  • Tap the cartridge holder to remove air bubbles and release some medicine into the air.

Inject the Medicine

  • Turn the dose knob to '1', insert the needle into your skin, and push the dose knob until it stops.
  • Count to 5 slowly before removing the needle.

Remove the Needle

  • Ensure '0' is displayed before removing the needle.
  • If the full dose isn’t received, reinsert the needle without redialing the dose.

Dispose of the Needle

  • Replace the outer needle shield and unscrew the capped needle.
  • Dispose of the needle in a sharps container — never in household waste.
  • Each pen contains 4 doses and should be discarded after the final dose.

Mounjaro is generally considered more effective than Wegovy for weight loss. Clinical trails show that Mounjaro leads to an average weight loss of nearly 25% after one year, compared to Wegovy's average weight loss of around 16%.

In most cases, the side effects associated with Mounjaro may not last more than a few days. For example, nausea or diarrhoea may quickly go away after your body has gotten used to taking the medication. But some side effects may last longer, especially if they are serious. The slow digestion and reduced appetite caused by Mounjaro will continue for as long as you use the medication. Most digestive issues should improve within a month, but they might return temporarily when you increase your dose.
You can inject Mounjaro in three different areas: your abdomen, thigh, or upper arm. There isn't a single best site for the injection, so you can choose whichever location you find most comfortable. Some studies suggest that injecting into the abdomen might be less painful compared to the other sites.

Here are 3 Natural Alternatives to Mounjaro

1. Dietary Changes

  • High-Fibre Foods: Incorporate fruits, vegetables, whole grains, and legumes to improve satiety and support weight management.
  • Protein-Rich Foods: Include lean meats, fish, eggs, and plant-based proteins to help control hunger and preserve muscle mass.

2. Herbal Supplements

  • Green Tea Extract: May support weight loss and help boost metabolism.
  • Garcinia Cambogia: A tropical fruit extract that may reduce appetite and limit fat storage.
  • Glucomannan: A natural soluble fiber that promotes fullness and may support healthy weight loss.

3. Lifestyle Adjustments

  • Regular Exercise: Activities like walking, running, or strength training can help burn calories and improve insulin sensitivity.
  • Hydration: Drinking enough water supports weight management and overall health.
  • Mindful Eating: Eat slowly and listen to your body’s hunger and fullness cues to avoid overeating.
Yes, you can switch from Wegovy to Mounjaro for more efficient weight loss. You have to wait for 5 weeks after injecting the last dose of Wegovy. Consult with your healthcare provider before making the switch. Please keep in mind that you can not use both injections simultaneously.
Yes, our Mounjaro packaging includes swabs and needles. It is also mentioned in the ‘instructions leaflet’ to use swabs before injecting weight loss injections.
Yes, your GP can prescribe you Mounjaro for weight loss, but only under certain criteria under the NHS. You can also get a private prescription for Mounjaro from The Care Pharmacy - a UK-registered online pharmacy.