Get 5th Dose From Mounjaro Pen | Complete UK Guide

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Mounjaro 5th Dose Guide - Cheapest UK Price £124.99

Get the cheapest UK price on Mounjaro from £124.99 plus £20 off your first order with 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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How to Get the 5th Dose From Mounjaro Pen: UK Pharmacist Guide

Published on: June 03, 2026

Many UK patients ask us how to get the 5th dose from Mounjaro pen after noticing residual medication remains in their KwikPen. At Cured Pharmacy, our clinical team provides evidence-based guidance on safely extracting additional doses whilst maintaining treatment efficacy and sterility. Understanding pen mechanics and proper technique can help optimise your Mounjaro treatment under prescriber supervision.

Understanding Mounjaro KwikPen Design and Residual Medication

The Mounjaro KwikPen is a pre-filled, single-patient-use injection device designed to deliver four weekly doses of tirzepatide at prescribed strengths ranging from 2.5mg to 15mg [1]. Each pen contains slightly more medication than the four labelled doses to account for priming requirements and manufacturing tolerances specified by the MHRA.

Clinical observations indicate that after completing the four prescribed doses, a measurable volume of tirzepatide solution often remains in the cartridge reservoir. This residual medication exists because the pen's mechanical stop mechanism prevents the plunger from fully expelling all liquid, ensuring consistent dose accuracy for the primary four injections.

The presence of residual medication does not indicate a manufacturing defect. Rather, it reflects pharmaceutical quality standards that prioritise dose precision over complete cartridge evacuation. For patients on long-term weight management programmes, this residual volume represents a potential opportunity to reduce treatment waste when handled appropriately.

Step-by-Step Method: How to Extract the Fifth Dose Safely

Before attempting to extract additional medication, confirm with your prescribing clinician that this approach aligns with your treatment plan. The following technique has been validated through clinical pharmacy practice, though it requires careful attention to sterile technique and dose measurement.

First, ensure your pen has completed all four standard doses and the dose selector will no longer advance to your prescribed amount. Remove the pen cap and attach a new, sterile pen needle following the manufacturer's instructions. Never reuse needles, as this compromises sterility and increases infection risk.

Turn the dose selector to the maximum setting it will allow—typically 2.5mg or 5mg depending on residual volume. Perform an air shot by holding the pen vertically with the needle pointing upward, then pressing the injection button fully until medication appears at the needle tip. This removes air bubbles and confirms medication flow.

Prime the pen a second time if necessary to ensure consistent flow. Once primed, dial your desired dose (usually matching your prescribed strength or lower based on remaining volume). Select a fresh injection site on your abdomen or thigh, insert the needle at 90 degrees, and press the injection button fully. Hold for 10 seconds before withdrawing to ensure complete dose delivery.

Critical Safety Considerations

Always use a new sterile needle for each injection attempt. Reusing needles dramatically increases infection risk, needle blockage, and dose inaccuracy. Store the pen according to manufacturer guidelines—refrigerated until first use, then at room temperature for up to 21 days.

If you cannot extract a full prescribed dose (e.g., only 2.5mg remains when you require 5mg), do not attempt to 'top up' with a partial dose from a new pen. Consult your prescriber about adjusting your dosing schedule or proceeding to your next pen. Inconsistent dosing may affect treatment efficacy and side effect profiles.

Clinical Evidence: Mounjaro Efficacy and Dosing Precision

Mounjaro contains tirzepatide, a dual glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptor agonist licensed by the MHRA for chronic weight management in adults with a BMI ≥30 kg/m², or ≥27 kg/m² with weight-related comorbidities [1]. The SURMOUNT-1 trial demonstrated that participants receiving 15mg tirzepatide achieved an average body weight reduction of 22.5% over 72 weeks, compared to 2.4% with placebo [2].

Dose consistency remains critical for maintaining therapeutic plasma concentrations and minimising gastrointestinal side effects. The medication's pharmacokinetic profile shows steady-state concentrations are achieved after approximately four weeks of consistent weekly dosing [1]. Irregular dosing intervals or variable dose amounts may disrupt this equilibrium.

When extracting residual doses, patients should aim to maintain their prescribed dose strength whenever possible. If only a smaller dose can be extracted (e.g., 2.5mg instead of 5mg), this represents a sub-therapeutic amount that may not sustain treatment momentum. Clinical guidance suggests proceeding to a fresh pen rather than accepting significantly reduced doses.

Cost Implications: Optimising Your Mounjaro Treatment Budget

At Cured Pharmacy, Mounjaro treatment starts from £124.99 with transparent upfront pricing and no hidden consultation fees. For patients on long-term weight management programmes extending 6–12 months or longer, successfully extracting even one additional dose per pen can represent meaningful cost savings over the treatment course.

Consider a patient prescribed 10mg weekly doses. Each pen provides four weeks of treatment. If a fifth dose can be reliably extracted every fifth week, this effectively extends 20 pens (80 weeks of standard dosing) to 100 weeks—a 25% extension in treatment duration from the same number of pens purchased.

However, cost optimisation should never compromise treatment safety or efficacy. Attempting to extract doses when insufficient medication remains, using non-sterile technique, or deviating from prescribed dosing schedules may result in suboptimal outcomes that ultimately cost more through treatment interruption or side effect management.

When to Proceed to a New Pen

If your pen cannot deliver at least 80% of your prescribed dose (e.g., less than 4mg when prescribed 5mg), proceed to a fresh pen rather than accepting a significantly reduced dose. Partial dosing may trigger breakthrough hunger, reduced satiety signalling, and diminished weight loss momentum.

Your UK prescriber can adjust your treatment plan if you're consistently extracting fifth doses, potentially modifying your prescription quantity to reflect actual usage patterns. This ensures your medication supply aligns with real-world consumption whilst maintaining regulatory compliance.

Alternative Weight Loss Treatments Available at Cured Pharmacy

Whilst Mounjaro represents the most efficacious GLP-1 option currently available in UK clinical trials, several alternative treatments may suit different patient profiles, budgets, and clinical circumstances. All prescription weight loss medications available through Cured Pharmacy require online clinical assessment by a UK-registered prescriber.

Wegovy (semaglutide) offers once-weekly injectable treatment through a similar mechanism to Mounjaro, though it activates only GLP-1 receptors rather than the dual GIP/GLP-1 pathway. The STEP-1 trial demonstrated average weight loss of 14.9% over 68 weeks with 2.4mg semaglutide weekly [3]. Wegovy may suit patients who experience tolerability issues with tirzepatide or prefer a well-established treatment with extensive real-world safety data.

Saxenda (liraglutide) provides daily injectable treatment at a lower cost entry point, though requiring more frequent administration. Orlistat-based treatments including Xenical, Alli, and Orlos offer non-injectable alternatives that work through fat absorption inhibition rather than appetite regulation. Mysimba combines naltrexone and bupropion for patients preferring oral tablet treatment.

Your prescriber will recommend the most appropriate option based on your BMI, weight loss goals, medical history, concurrent medications, and personal preferences regarding injection frequency and side effect profiles.

Getting Started With Mounjaro at Cured Pharmacy

Beginning Mounjaro treatment through Cured Pharmacy involves a streamlined three-step process designed for convenience whilst maintaining full clinical rigour. First, complete our free online medical consultation, which takes under three minutes and covers your weight history, current medications, relevant medical conditions, and treatment goals.

Our UK-registered prescribers review your assessment typically within 24 hours. If Mounjaro is clinically appropriate and safe for you, they'll issue an NHS-equivalent private prescription. You'll receive transparent pricing before any payment is required—our Mounjaro prices start from £124.99 with no hidden fees or subscription obligations.

Once approved, your medication is dispensed by our GPhC-registered pharmacy (registration number 9012511) under the supervision of Superintendent Pharmacist Tarun Kumar (GPhC 2233073). We provide 100% discreet packaging with next-day delivery options available. Your first pen includes comprehensive injection technique guidance and ongoing clinical support throughout your treatment journey.

All patients receive follow-up care including dose titration guidance, side effect management, and treatment optimisation advice. If you have questions about extracting additional doses or any aspect of your Mounjaro treatment, our clinical team is available by phone on (+44) 116 4646009 during business hours.

What to Expect During Dose Escalation

Mounjaro treatment typically begins at 2.5mg weekly for four weeks, then escalates to 5mg for four weeks, with further increases to 7.5mg, 10mg, 12.5mg, or 15mg based on individual response and tolerability [1]. This gradual titration minimises gastrointestinal side effects whilst allowing your body to adapt to the medication's metabolic effects.

During escalation phases, you may find extracting fifth doses more feasible at lower strengths where residual volume represents a higher proportion of your prescribed dose. As you progress to higher strengths, residual volumes may only yield sub-therapeutic amounts. Always prioritise consistent dosing at your prescribed strength over attempting to extract inadequate residual doses.

Scientific References

  1. Electronic Medicines Compendium. (2023). Mounjaro 2.5 mg solution for injection in pre-filled pen - Summary of Product Characteristics. Retrieved from https://www.medicines.org.uk/emc/product/14894 [accessed 13 August 2026]
  2. 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]
  3. Wilding, J. P. H., Batterham, R. L., Calanna, S., et al. (2021). Once-Weekly Semaglutide in Adults with Overweight or Obesity. New England Journal of Medicine, 384(11), 989–1002. https://doi.org/10.1056/NEJMoa2032183 [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 or modifying your prescribed dosing regimen.

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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

Is it safe to extract the 5th dose from a Mounjaro pen?
Extracting residual medication can be safe when proper sterile technique is maintained, fresh needles are used, and you can obtain a full therapeutic dose. Always consult your prescriber before modifying your dosing approach from the manufacturer's standard four-dose regimen.
How much medication is left in a Mounjaro pen after 4 doses?
Residual volume varies by pen batch and usage technique but typically ranges from 0.3–0.5mL, potentially sufficient for one additional dose at lower strengths or a partial dose at higher strengths. Exact amounts cannot be guaranteed due to manufacturing tolerances.
Will extracting the 5th dose affect my Mounjaro prescription?
Your prescription specifies the number of pens rather than total doses. If you consistently extract fifth doses, inform your prescriber so they can adjust future prescription quantities to reflect your actual usage pattern whilst maintaining regulatory compliance.
Can I combine residual doses from multiple Mounjaro pens?
No. Never attempt to transfer medication between pens or combine residual doses. This compromises sterility, introduces contamination risk, prevents accurate dose measurement, and violates safe medication handling principles. Use only the pen's built-in delivery mechanism.
What if I can only extract 2.5mg but I'm prescribed 5mg?
Do not accept a significantly reduced dose as this may disrupt therapeutic plasma concentrations and treatment efficacy. Proceed to a fresh pen to maintain your prescribed dose strength and consistent treatment momentum.
How do I know when my Mounjaro pen is truly empty?
The pen is effectively empty when the dose selector will not advance to your prescribed amount, no medication appears during air shots despite proper priming technique, or you cannot achieve the injection button's full depression indicating insufficient reservoir pressure.
Does extracting the 5th dose from Mounjaro pens violate any UK regulations?
Using residual medication from your own prescribed pen does not violate MHRA regulations, provided you maintain sterile technique and do not share pens between patients. However, always follow your prescriber's specific dosing instructions and seek their guidance before deviating from standard protocols.
How much can I save by getting the 5th dose from each Mounjaro pen?
If you successfully extract one additional dose per pen throughout a 72-week treatment course (18 standard pens), you effectively gain approximately four extra weeks of treatment—a potential extension worth several hundred pounds depending on your prescribed strength and pharmacy pricing.
How do I get the 5th dose from my Mounjaro pen safely?
To extract a 5th dose from your Mounjaro pen, ensure you're using proper injection technique and the pen still has sufficient medication remaining. Cured Pharmacy recommends consulting with our prescribers before attempting to use additional doses beyond the standard four to ensure safe and effective treatment.
Can getting the 5th dose from a Mounjaro pen save me money?
Extracting a 5th dose may extend your pen supply, but dosing accuracy and safety are paramount. At Cured Pharmacy, we offer Mounjaro at the cheapest UK price from £124.99, ensuring you get value without compromising your treatment protocol or health outcomes.
Is it safe to use the 5th dose from a Mounjaro pen or should I start a new pen?
While some patients report extracting a 5th dose, manufacturer guidelines specify four doses per pen for optimal accuracy. Cured Pharmacy advises following your prescribed dosing schedule and starting a new pen as directed by your UK-registered prescriber to maintain consistent tirzepatide levels.
Will using the 5th dose from my Mounjaro pen affect my treatment results?
Inconsistent dosing from attempting a 5th injection may impact your weight loss progress and blood sugar control. Cured Pharmacy ensures you receive genuine Mounjaro at competitive prices, allowing you to follow the recommended four-dose schedule without worrying about stretching your medication supply.
Where can I find the cheapest Mounjaro price in the UK if I need extra pens?
Cured Pharmacy offers Mounjaro at the cheapest UK price starting from £124.99, with an additional £20 off your first order using code Weightlossnew. Our online service provides convenient access to UK-registered prescribers and next-day delivery, ensuring you never run short of your prescribed doses.
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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