How Many Doses in Mounjaro Pen? UK Dosing Guide

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Cheapest Mounjaro Pen Doses - UK Price £124.99

Each Mounjaro pen delivers 4 doses at the cheapest UK price from £124.99 with £20 off using code Weightlossnew.

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Our Pricing

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 £124.99

£31.25 / 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 £159.00

£39.75 / 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 £200.00

£50.00 / 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 £225.00

£56.25 / 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 £250.00

£62.50 / 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 £267.00

£66.75 / 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 £69.00

£17.25 / 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

£99 £79.00

£19.75 / Per Week

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

⭐ Future Orders at £99
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Wegovy (Semaglutide)
Weeks 9–12

1mg

1 pen • 4 Weeks

£119 £99.00

£24.75 / 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 £149.00

£37.25 / 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 £179.00

£44.75 / Per Week

Maximum dose – the highest available strength for optimal weight management

⭐ Future Orders at £199
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Wegovy Oral Pill
Weeks 1–4

1.5mg

1 pen • 4 Weeks

£83.00 £63.00

£20.75 / Per Week

Your starting dose – eases your body into treatment with minimal side effects

⭐ Future Orders at £83.00
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Wegovy Oral Pill
Weeks 5–8

4mg

1 pen • 4 Weeks

£110.00 £90.00

£27.50 / Per Week

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

⭐ Future Orders at £110.00
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Wegovy Oral Pill
Weeks 9–12

9mg

1 pen • 4 Weeks

£140.00 £120.00

£35.00 / Per Week

Mid-range dose – where most patients start seeing meaningful results

⭐ Future Orders at £140.00
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Wegovy Oral Pill
Weeks 13+

25mg

1 pen • 4 Weeks

£199.00 £179.00

£49.75 / Per Week

Maximum dose – the highest available strength for optimal weight management

⭐ Future Orders at £199.00
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Your How Many Doses In Mounjaro Pen Questions Answered

Published on: June 03, 2026

Understanding how many doses in mounjaro pen you'll receive is essential for planning your weight loss treatment. Each Mounjaro KwikPen contains four single-use doses, designed for once-weekly subcutaneous injection over a four-week period. At Cured Pharmacy, our UK-registered clinical team provides comprehensive guidance on Mounjaro dosing, storage, and administration to ensure safe, effective treatment.

How Many Doses Are in Each Mounjaro Pen?

Every Mounjaro KwikPen contains exactly four pre-measured doses, regardless of the strength prescribed. Whether you're using the 2.5mg starter dose or the maximum 15mg maintenance dose, each pen delivers four weekly injections [1]. This standardised design simplifies treatment adherence and helps patients track their monthly supply accurately.

The pen mechanism is engineered as a single-patient, multi-dose device with a dose counter window that displays remaining doses. After each injection, the counter advances automatically, providing clear visual confirmation of how many doses remain in your current pen [2]. This eliminates guesswork and reduces the risk of missed or duplicated doses.

UK prescribers typically initiate treatment with one 2.5mg pen (four doses over four weeks), then escalate the dose every four weeks based on tolerability and clinical response. Understanding this four-dose-per-pen structure helps patients anticipate when they'll need their next prescription and plan refills accordingly.

Mounjaro Dosing Schedule and Escalation

The MHRA-approved dosing schedule for Mounjaro begins at 2.5mg once weekly for the first four weeks, serving as an initiation dose to minimise gastrointestinal side effects [1]. After completing your first pen, your prescriber may increase the dose to 5mg weekly for the next four weeks, then continue escalating in 2.5mg increments every four weeks until reaching your optimal maintenance dose.

Clinical trials demonstrate that gradual dose escalation significantly reduces the incidence of nausea, vomiting, and diarrhoea compared to starting at higher doses [3]. The maximum licensed dose is 15mg once weekly, though many patients achieve substantial weight loss at lower maintenance doses of 10mg or 12.5mg.

Each dose strength requires a separate pen prescription. For example, if you're escalating from 5mg to 7.5mg, you'll receive a new pen containing four 7.5mg doses. This ensures precise dosing throughout your treatment journey and prevents accidental under- or over-dosing.

Choosing Your Injection Day

Mounjaro offers flexible once-weekly dosing on any day that suits your routine. Most patients select the same day each week to establish a consistent habit, though you can adjust your injection day if needed. If you must change your regular day, ensure at least three days (72 hours) have passed since your last injection [2].

Setting a weekly reminder on your phone or marking your calendar helps maintain adherence. Consistent weekly dosing optimises the medication's appetite-suppressing and glucose-regulating effects, supporting steady weight loss throughout your treatment programme.

How Long Does a Mounjaro Pen Last?

A single Mounjaro KwikPen lasts exactly four weeks when used according to the once-weekly dosing schedule. This four-week supply aligns with standard monthly prescription cycles in UK clinical practice, making it straightforward to coordinate refills with your healthcare provider.

Before first use, unopened Mounjaro pens remain stable when refrigerated between 2°C and 8°C until the expiry date printed on the label. Once you begin using a pen, it can be stored in the refrigerator or at room temperature (up to 30°C) for up to 21 days [2]. This flexibility accommodates travel and varying storage conditions without compromising medication efficacy.

After 21 days of first use, any remaining doses in the pen should be discarded, even if doses remain. Most patients complete all four doses well within this timeframe when following the weekly schedule. Always check the dose counter before each injection to confirm doses are available and inspect the solution for clarity—it should be colourless to slightly yellow and free from particles.

Treatment Doses Per Pen Dosing Frequency Starting Price
Mounjaro (tirzepatide) 4 doses Once weekly From £124.99
Wegovy (semaglutide) 4 doses Once weekly From £69.00
Saxenda (liraglutide) 30 doses Daily injection From £68.00

Proper Mounjaro Pen Storage and Handling

Correct storage preserves tirzepatide's molecular stability and ensures each dose delivers the intended therapeutic effect. Store unopened pens in their original carton in the refrigerator, protected from light and away from the freezer compartment [2]. Never use a pen that has been frozen, even if it has subsequently thawed, as freezing permanently damages the medication's protein structure.

Once in use, you may keep the pen at room temperature (below 30°C) for convenience, particularly if you travel frequently or prefer not to inject cold medication. Many patients find room-temperature injections more comfortable and less likely to cause injection-site reactions. Remove the pen from the refrigerator 15-30 minutes before injection to allow it to warm naturally—never use external heat sources like microwaves or hot water.

Always replace the pen cap after each use to protect the medication from light exposure and contamination. Store the pen with the cap on in a safe location away from children and pets. Dispose of used pens in a sharps container according to your local council's guidelines for pharmaceutical waste.

Travelling with Your Mounjaro Pen

When travelling, carry your Mounjaro pen in your hand luggage with a copy of your prescription or a letter from your prescriber. Use an insulated medication travel case with a cool pack (not ice) to maintain appropriate temperatures during transit. UK passengers can take medication in hand luggage through airport security when accompanied by supporting documentation.

If refrigeration is unavailable during short trips, the 21-day room temperature storage window provides adequate flexibility for most travel scenarios. For longer journeys, portable medication coolers designed for injectable treatments maintain stable temperatures without freezing.

Mounjaro Pen Administration Technique

Each Mounjaro KwikPen is designed for subcutaneous injection into the abdomen, thigh, or upper arm. The pen's pre-filled, pre-measured design eliminates the need for dose calculation or needle attachment—simply remove the cap, select your injection site, press the pen firmly against your skin, and press the dose button until you hear a click [2].

Rotate injection sites weekly to reduce the risk of lipohypertrophy (fatty lumps under the skin) and injection-site reactions. For example, if you inject into your abdomen one week, choose your thigh the following week. Avoid injecting into areas with scars, bruises, or skin abnormalities, and maintain at least 5cm distance from your navel.

After pressing the dose button, keep the pen pressed against your skin for at least 10 seconds to ensure complete dose delivery. You'll see the dose counter return to zero, confirming the injection is complete. Remove the pen, dispose of it safely after the fourth dose, and apply gentle pressure to the injection site if needed—do not rub.

Understanding Mounjaro Treatment Value and Costs

At Cured Pharmacy, Mounjaro treatment starts from £124.99, with transparent pricing displayed before your clinical consultation. This upfront cost clarity helps you plan your weight loss investment without hidden fees or unexpected charges. Each pen provides four weeks of treatment, making it straightforward to calculate monthly expenses.

The cost per pen varies with dose strength, as higher-dose pens contain more active tirzepatide. Your UK prescriber determines the appropriate dose based on your treatment response, tolerability, and weight loss goals during your free online assessment. Many patients find that the significant weight loss achieved with Mounjaro—averaging over 20% body weight reduction in clinical trials—represents substantial value compared to alternative interventions [1][3].

Unlike some weight loss treatments that require daily dosing or frequent clinic visits, Mounjaro's once-weekly self-administration reduces treatment burden and long-term costs. The four-dose pen design also minimises waste compared to single-dose vials, ensuring you receive full value from each prescription. All Mounjaro supplied by Cured Pharmacy is UK-licensed, genuine medication dispensed by our GPhC-registered pharmacy team.

Comparing Mounjaro to Other Weight Loss Treatments

When evaluating weight loss options, consider both clinical efficacy and practical factors like dosing frequency and pen longevity. Mounjaro's dual GIP/GLP-1 mechanism produces greater average weight loss than single-pathway GLP-1 treatments in head-to-head trials [3]. The four-dose pen provides a full month of treatment, whereas some alternatives require daily injections or multiple pens per month.

Your choice of treatment should be guided by your UK prescriber's clinical assessment, considering your medical history, weight loss goals, and lifestyle factors. Cured Pharmacy offers a comprehensive range of MHRA-licensed weight loss treatments, ensuring you receive the most appropriate option for your individual needs.

Scientific References

  1. Jastreboff, A. M., Aronne, L. J., Ahmad, N. N., 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 [accessed 13 August 2026]
  2. Eli Lilly and Company. (2023). Mounjaro 2.5 mg solution for injection in pre-filled pen: Summary of Product Characteristics. Electronic Medicines Compendium. Retrieved from https://www.medicines.org.uk/emc/product/14598 [accessed 13 August 2026]
  3. Ludvik, B., Giorgino, F., Jódar, E., et al. (2021). Once-weekly tirzepatide versus once-daily insulin degludec as add-on to metformin with or without SGLT2 inhibitors in patients with type 2 diabetes (SURPASS-3): a randomised, open-label, parallel-group, phase 3 trial. The Lancet, 398(10300), 583–598. https://doi.org/10.1016/S0140-6736(21)01443-4 [accessed 13 August 2026]
  4. NHS. (2026). Tirzepatide: a medicine to manage type 2 diabetes and treat obesity. https://www.nhs.uk/medicines/tirzepatide/ Accessed 13 August 2026.
  5. NHS. (2026). Overweight and obesity in adults. https://www.nhs.uk/conditions/overweight-and-obesity/ Accessed 13 August 2026.
  6. NHS England. (2026). Weight management injections. https://www.england.nhs.uk/ourwork/prevention/obesity/medicines-for-obesity/weight-management-injections/ Accessed 13 August 2026.

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. Mounjaro is a prescription-only medicine and suitability is determined on an individual basis following consultation with our clinical team.

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Real people, real results

Jane L.

"Brilliant. Lost 4 stone on mounjaro no side effects at all. Cured pharmacy are excellent. Always helpful pens sent out quickly always comes with needles and sterile wipes. If you want to go on GLP-1 go to cured pharmacy. So professional. Thank you cured pharmacy you changed my health and well being."

Ann-Marie

"I absolutely love this product, I have been using 2.5mg as maintenance dose and have managed to control my weight without any side effects and can still eat well balanced meals. The pharmacy is very efficient friendly and helpful I would not purchase from anywhere else."

Sacha W.

"So far I'm really impressed by my results it's crazy cause I'm not snacking like how I used to do and I see my face slimming down already and it's only been 2 and a half weeks. Can't wait to give my feedback in 5 months time thank you cured pharmacy."

Kimberly G.

"Mounjaro has corrected my hormonal weight gain during menopause. I am using it now to maintain that balance. The results for me have been exceptional!"

Jennifer

"Great really helps cure those nasty habits can't wait for my next mounjaro pen."

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Faq

How many doses in mounjaro pen are included?
Each Mounjaro KwikPen contains exactly four pre-measured doses, designed for once-weekly subcutaneous injection over a four-week period. The dose counter window displays remaining doses after each use.
Can I use a Mounjaro pen for more than four weeks?
No. Each pen is designed for four weekly doses only and should be discarded after the fourth injection or 21 days after first use, whichever comes first, even if the dose counter shows remaining doses.
What happens if I miss a weekly Mounjaro dose?
If you miss a dose and fewer than four days have passed, inject as soon as you remember and resume your regular weekly schedule. If more than four days have passed, skip the missed dose and inject on your next scheduled day.
Do different Mounjaro dose strengths have different numbers of doses?
No. All Mounjaro KwikPen strengths—from 2.5mg to 15mg—contain exactly four doses. The pen design is standardised across all dose strengths for consistency and ease of use.
How do I know when my Mounjaro pen is empty?
The dose counter window on your pen displays the number of remaining doses. After your fourth injection, the counter will show zero, indicating the pen is empty and should be disposed of in a sharps container.
Can I share my Mounjaro pen with someone else?
Absolutely not. Mounjaro pens are single-patient devices and must never be shared, even if the needle is changed. Sharing injection devices risks transmission of blood-borne infections and is unsafe.
How should I store my Mounjaro pen between doses?
Store unopened pens in the refrigerator between 2°C and 8°C. Once in use, you may refrigerate or store at room temperature (up to 30°C) for up to 21 days. Always replace the cap after each use and protect from light.
Does Cured Pharmacy require a prescription for Mounjaro?
Yes. Mounjaro is a prescription-only medication in the UK. Our UK-registered prescribers conduct a free online clinical assessment to determine suitability before dispensing, ensuring safe and appropriate treatment.
How many doses are in each Mounjaro pen?
Each Mounjaro pen contains 4 doses, designed for 4 weekly injections. After 4 weeks, you will need a new pen to continue your treatment with Cured Pharmacy.
Does the number of doses in a Mounjaro pen change with higher strengths?
No, every Mounjaro pen contains exactly 4 doses regardless of strength, from 2.5mg to 15mg. Each pen is pre-filled to deliver 4 weekly injections at the prescribed dose level available through Cured Pharmacy.
What happens if I miss a dose from my Mounjaro pen?
If you miss a dose and it's within 4 days of your scheduled injection, take it as soon as possible. If more than 4 days have passed, skip the missed dose and resume your normal schedule with the remaining doses in your pen from Cured Pharmacy.
Can I use a Mounjaro pen for longer than 4 weeks?
No, each Mounjaro pen is designed for exactly 4 weekly doses and should be discarded after 30 days, even if it contains leftover medication. Cured Pharmacy recommends ordering your next pen in advance to avoid treatment interruption.
How do I know how many doses are left in my Mounjaro pen?
Each Mounjaro pen has a dose counter window that displays the number of doses remaining after each injection. You can visually check this before each weekly injection to track your usage throughout the month with Cured Pharmacy.
Tarun Kumar, Prescribing Pharmacist

Medically reviewed by

Tarun Kumar, Prescribing Pharmacist (GPhC 2233073)

Reviewed on: June 03, 2026

Last reviewed: 13 August 2026

Last updated on 13 August 2026.

Review History

Our experts continually monitor new findings in health and medicine, and we update our articles when new information becomes available.

Why this page was updated on 13 August 2026

Content checked and updated as part of our periodic review, to ensure accuracy and currentness.

Current version (13 August 2026)

Edited by: The Editorial Team

Medically reviewed by:

Tarun Kumar, GPhC No. 2233073, Prescribing Pharmacist


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