Forgot To Refrigerate Wegovy? UK Storage Guide

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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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What To Do If You Forgot To Refrigerate Your Wegovy

Published on: June 03, 2026

If you forgot to refrigerate Wegovy UK pens overnight or during travel, don't panic—understanding the medication's temperature stability is crucial before deciding whether your pen remains safe to use. Wegovy (semaglutide) has specific storage tolerances that allow temporary room temperature exposure, but exceeding these limits can compromise the medication's effectiveness and safety.

How Long Can Wegovy Stay Out of the Fridge?

Unopened Wegovy pens can remain at room temperature (up to 30°C) for up to 28 days without compromising the medication's stability [1]. This built-in tolerance accounts for typical scenarios like postal delays, travel, or accidental overnight storage at room temperature. Once you've opened and used a Wegovy pen, it can stay out of refrigeration for the same 28-day period, provided temperatures don't exceed 30°C.

If your pen has been left out for less than 28 days and hasn't been exposed to direct sunlight or temperatures above 30°C, it's generally safe to continue using after returning it to the fridge. However, if you're unsure about the exact duration or temperature conditions, contact our clinical team at Cured Pharmacy on (+44) 116 4646009 for personalised guidance. Superintendent pharmacist Tarun Kumar (GPhC 2233073) and our UK-registered prescribers can assess your specific situation and advise whether a replacement pen is necessary.

Signs Your Wegovy Pen May Be Compromised

Temperature abuse doesn't always produce visible changes immediately. Semaglutide's molecular structure can degrade at elevated temperatures even when the solution still appears clear [1]. This is why adherence to the 28-day room temperature limit and 30°C maximum is critical—exceeding these parameters may reduce the medication's glucose-lowering and weight-loss efficacy without obvious visual cues.

If you've accidentally frozen Wegovy (temperatures below 2°C), the pen must be discarded immediately, even if it later thaws and appears normal. Freezing irreversibly damages semaglutide's protein structure, rendering it ineffective and potentially unsafe [2].

Visual Inspection Checklist

Before using a Wegovy pen that's been left unrefrigerated, inspect the solution carefully through the pen window. Semaglutide should appear clear and colourless—any cloudiness, discolouration, particles, or crystallisation indicates the medication has degraded and should not be used [2]. Even if the pen was only out of the fridge briefly, these visual changes mean the active ingredient has become unstable.

Additionally, check the pen's physical integrity. If the pen was exposed to temperatures above 30°C (such as in a hot car or near a radiator), the plastic components may have warped slightly, and internal seals could be compromised. When in doubt, err on the side of caution and request a replacement through your prescriber rather than risk injecting degraded medication.

Proper Wegovy Storage Guidelines UK

Store unopened Wegovy pens in a refrigerator at 2°C to 8°C, ideally in the original carton to protect from light. Never store pens in the freezer compartment or directly against the back wall of the fridge where temperatures may drop below 2°C. Many patients find storing Wegovy on a middle shelf or in the door compartment (if temperatures remain stable) prevents accidental freezing.

Once you've used a Wegovy pen for the first time, you can choose to keep it refrigerated or store it at room temperature (below 30°C) for up to 28 days. Many patients prefer room temperature storage for in-use pens, as this reduces injection-site discomfort—cold injections can cause temporary stinging. Always replace the pen cap after each use to protect the medication from light and contamination.

When travelling with Wegovy, use an insulated medication pouch with a temperature monitor if you'll be away from refrigeration for extended periods. Avoid leaving pens in checked luggage (where temperatures can drop below freezing at altitude) or in vehicles during warm weather. If you're travelling internationally, carry your prescription documentation and consider requesting a letter from your prescriber confirming your need for refrigerated medication.

Medication Refrigerated Storage Room Temperature Limit Maximum Temperature
Wegovy (semaglutide) 2°C to 8°C 28 days 30°C
Mounjaro (tirzepatide) 2°C to 8°C 21 days 30°C
Saxenda (liraglutide) 2°C to 8°C 30 days 30°C

What Happens If You Use Improperly Stored Wegovy

If you suspect you've been using improperly stored Wegovy and have noticed diminished effects, contact your prescriber rather than increasing your dose independently. Your healthcare provider may recommend continuing with a fresh pen at your current dose level or adjusting your treatment plan based on your recent glucose readings and weight loss trajectory.

Reduced Efficacy vs Safety Concerns

Using Wegovy that's been stored incorrectly primarily risks reduced therapeutic effect rather than immediate harm. Degraded semaglutide may not adequately suppress appetite or regulate blood glucose, potentially stalling your weight loss progress or causing glucose fluctuations if you're using the medication for type 2 diabetes management [3]. You might notice increased hunger, less satiety after meals, or slower weight loss compared to previous weeks.

While improperly stored semaglutide is unlikely to cause acute toxicity, using degraded medication introduces unnecessary uncertainty into your treatment plan. The STEP clinical trials that demonstrated semaglutide's average 15% body weight reduction over 68 weeks relied on properly stored, stable medication [3]. Using compromised pens means you're not receiving the evidence-based treatment that regulatory bodies like the MHRA licensed based on those trial results.

Forgot to Refrigerate Wegovy: Immediate Steps

If you discover your Wegovy pen has been left out, immediately note the time it's been unrefrigerated and the ambient temperature conditions. Place the pen back in the fridge (not the freezer) and mark the date on the pen label. Calculate whether the total room temperature exposure exceeds 28 days—if not, and temperatures stayed below 30°C, the pen should remain effective.

Perform a visual inspection as described earlier: hold the pen up to light and check for clarity. If the solution appears normal and you're within the 28-day window, you can continue your dosing schedule as planned. However, if you're approaching your next dose and have any doubts about the pen's integrity, it's safer to delay injection and consult a healthcare professional first.

Document the incident for your records, especially if you notice any changes in the medication's effectiveness over subsequent doses. This information helps your prescriber assess whether the storage lapse affected your treatment outcomes. At Cured Pharmacy, our clinical team can review your situation during a brief consultation and arrange a replacement pen if necessary, ensuring continuity of your weight loss programme.

Wegovy Storage vs Other Weight Loss Injections

All GLP-1 medications share the same fundamental vulnerability: they're protein-based molecules that degrade when exposed to temperature extremes or prolonged heat. Whether you're using Wegovy, Saxenda, or Mounjaro, establishing a consistent storage routine—checking fridge temperatures monthly, using insulated travel cases, and setting phone reminders to return pens to refrigeration—protects your investment in these prescription treatments and ensures you receive their full clinical benefit.

Comparing Semaglutide and Tirzepatide Stability

Different GLP-1 receptor agonists have varying storage requirements. Saxenda (liraglutide), which requires daily injections, can stay at room temperature for 30 days after first use—similar to Wegovy's 28-day window [4]. However, Saxenda's daily dosing means patients go through pens faster, reducing the cumulative risk of prolonged room temperature exposure.

Mounjaro (tirzepatide), available from £79.00 at Cured Pharmacy, follows comparable storage guidelines: refrigerate at 2°C to 8°C, with up to 21 days allowed at room temperature (below 30°C) for in-use pens [4]. Tirzepatide's dual GIP/GLP-1 mechanism produces greater average weight loss in clinical trials compared to semaglutide alone, but both medications require the same careful attention to storage conditions to maintain their molecular stability.

Scientific References

  1. Novo Nordisk. (2023). Wegovy 0.25 mg, 0.5 mg, 1 mg, 1.7 mg, 2.4 mg solution for injection in pre-filled pen: Summary of Product Characteristics. Electronic Medicines Compendium. https://www.medicines.org.uk/emc/product/13799 [accessed 13 August 2026]
  2. Medicines and Healthcare products Regulatory Agency. (2022). Semaglutide (Wegovy): Storage and handling guidance for healthcare professionals. GOV.UK. https://www.gov.uk/drug-safety-update/semaglutide-wegovy-storage-and-handling [accessed 13 August 2026]
  3. Wilding, J. P. H., Batterham, R. L., Calanna, S., Davies, M., Van Gaal, L. F., Lingvay, I., McGowan, B. M., Rosenstock, J., Tran, M. T. D., Wadden, T. A., Wharton, S., Yokote, K., Zeuthen, N., & Kushner, R. F. (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. Eli Lilly and Company. (2023). Mounjaro 2.5 mg solution for injection in pre-filled pen: Summary of Product Characteristics. Electronic Medicines Compendium. https://www.medicines.org.uk/emc/product/14298 [accessed 13 August 2026]
  5. NHS. (2026). Tirzepatide: a medicine to manage type 2 diabetes and treat obesity. https://www.nhs.uk/medicines/tirzepatide/ Accessed 13 August 2026.
  6. NHS. (2026). Overweight and obesity in adults. https://www.nhs.uk/conditions/overweight-and-obesity/ Accessed 13 August 2026.
  7. 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.

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Faq

Can I use Wegovy if I forgot to refrigerate it overnight?
Yes, if your Wegovy pen was left at room temperature (below 30°C) for one night and the total unrefrigerated time doesn't exceed 28 days, the medication should remain stable and safe to use.
How do I know if my Wegovy pen is still good after being left out?
Inspect the solution through the pen window—it should be clear and colourless with no particles or cloudiness. If it appears normal and hasn't exceeded 28 days at room temperature or 30°C, it's likely still effective.
What happens if Wegovy gets too warm?
Exposure to temperatures above 30°C can degrade semaglutide's molecular structure, reducing its effectiveness at suppressing appetite and regulating glucose, even if the solution still appears clear.
Can I put Wegovy back in the fridge after leaving it out?
Yes, return the pen to refrigeration immediately (2°C to 8°C) and mark the date. As long as total room temperature exposure stays under 28 days and temperatures didn't exceed 30°C, the pen remains usable.
Does Wegovy need to be refrigerated once opened?
Opened Wegovy pens can be stored in the fridge or at room temperature (below 30°C) for up to 28 days. Many patients prefer room temperature storage for in-use pens to reduce injection discomfort.
What should I do if I accidentally froze my Wegovy?
Discard any Wegovy pen that has been frozen (below 2°C), even if it later thaws and appears normal. Freezing permanently damages semaglutide's protein structure, making it ineffective and potentially unsafe.
How long can Wegovy stay unrefrigerated during travel?
Wegovy can remain unrefrigerated for up to 28 days at temperatures below 30°C. Use an insulated medication pouch for travel and avoid leaving pens in hot vehicles or checked luggage where temperatures fluctuate significantly.
Will my weight loss stop if I use improperly stored Wegovy?
Degraded semaglutide may provide reduced appetite suppression and glucose regulation, potentially slowing weight loss progress. If you notice diminished effects after a storage incident, consult your prescriber about continuing with a fresh pen.
What happens if I forgot to refrigerate Wegovy UK pens overnight?
If you forgot to refrigerate Wegovy in the UK for less than 28 days and kept it below 30°C, it remains safe to use. Cured Pharmacy can provide replacement pens from £69 if your medication has been compromised beyond recommended storage conditions.
Can I still use Wegovy if I left it out of the fridge for a week?
Wegovy can be stored at room temperature (below 30°C) for up to 28 days total. If it's been longer or exposed to higher temperatures, contact Cured Pharmacy for a replacement prescription to ensure medication safety and effectiveness.
How do I get a replacement Wegovy prescription if mine was stored incorrectly?
Cured Pharmacy offers fast online consultations with UK-registered prescribers who can issue replacement Wegovy prescriptions from £69. Complete our quick assessment and receive your new pen with next-day delivery available across the UK.
Does Wegovy lose effectiveness if not refrigerated properly in the UK?
Wegovy may lose potency if stored incorrectly beyond manufacturer guidelines. If you forgot to refrigerate Wegovy UK pens outside the 28-day room temperature window, replacement is recommended to maintain treatment efficacy and safe blood sugar control.
Where can I buy replacement Wegovy at the cheapest UK price after storage mistakes?
Cured Pharmacy offers the cheapest UK Wegovy prices from £69, with £20 off first orders using code WEIGHTLOSSNEW. Our UK-registered prescribers provide same-day approvals and discreet next-day delivery for replacement pens.
What should I do if I forgot to refrigerate Wegovy UK overnight?
If you forgot to refrigerate Wegovy in the UK for less than 28 days and it stayed below 30°C, the pen is usually still safe to use. Check the pen for discolouration or particles, and contact Cured Pharmacy if you're unsure whether your Wegovy is still effective.
How long can Wegovy be left out of the fridge before it goes bad?
Wegovy can be stored at room temperature (below 30°C) for up to 28 days after first use or if left unrefrigerated. If you forgot to refrigerate Wegovy UK pens beyond this period or exposed them to heat above 30°C, they should be discarded safely.
Can I still use my Wegovy pen if I forgot to refrigerate it once?
Yes, if you forgot to refrigerate Wegovy for a short period and it remained below 30°C, it should still be safe to use within the 28-day room temperature window. Cured Pharmacy advises inspecting the solution and consulting a pharmacist if you have any concerns about potency.
Does forgetting to refrigerate Wegovy affect how well it works?
Forgetting to refrigerate Wegovy briefly usually does not affect its effectiveness if stored correctly otherwise. However, prolonged exposure to heat or light can reduce the medication's potency, so always store unopened pens in the fridge and track room temperature storage time carefully.
Where can I get replacement Wegovy in the UK if mine was left out too long?
If your Wegovy was left unrefrigerated too long and needs replacing, Cured Pharmacy offers fast UK delivery from £69.00. Our UK-registered prescribers can review your needs online and arrange a replacement pen quickly and affordably.
What should I do if I forgot to refrigerate Wegovy overnight in the UK?
If you forgot to refrigerate Wegovy for less than 28 days and it stayed below 30°C, it remains safe to use. Cured Pharmacy recommends checking the pen for discolouration or particles, and if in doubt, contact our clinical team for personalised advice before your next injection.
Can I still use my Wegovy pen if I left it out of the fridge for a week?
Yes, Wegovy can be stored at room temperature up to 30°C for a maximum of 28 days. If your pen was left out for a week within this temperature range, it is still effective. Cured Pharmacy provides guidance on proper storage to ensure your treatment remains safe.
How long can Wegovy be unrefrigerated before it goes bad?
Wegovy remains stable for up to 28 days when stored below 30°C outside the fridge. Beyond this period, the medication may lose potency and should be discarded. Cured Pharmacy supplies fresh Wegovy pens and offers expert storage advice with every order.
Will leaving Wegovy out affect how well it works for weight loss?
If Wegovy was left unrefrigerated within safe limits (under 30°C for less than 28 days), its effectiveness is not compromised. However, exposure to higher temperatures or longer periods may reduce efficacy. Cured Pharmacy's clinical team can advise if you need a replacement pen.
Where can I get replacement Wegovy cheaply if mine was ruined by heat in the UK?
Cured Pharmacy offers Wegovy from £69.00, the cheapest UK price, with £20 off your first order using code WEIGHTLOSSNEW. Our UK-registered prescribers can quickly arrange a replacement pen with fast delivery if your medication was damaged by improper storage.
How long can Wegovy be left out of the fridge safely?
Wegovy can be stored at room temperature (up to 30°C) for up to 28 days if unopened. If you forgot to refrigerate Wegovy in the UK, check how long it's been out and ensure it hasn't exceeded this timeframe. Cured Pharmacy can advise if your pen is still safe to use or if you need a replacement.
What should I do if I forgot to refrigerate Wegovy overnight?
If you forgot to refrigerate Wegovy overnight in the UK, the pen should still be safe to use as long as it hasn't exceeded 30°C and the total time out of the fridge stays under 28 days. Return it to the fridge immediately and mark the date it was first left out. Contact Cured Pharmacy if you're unsure about your pen's safety.
Can I still use Wegovy if it's been left out for a week?
Yes, Wegovy left out for a week at room temperature is generally still usable, as it remains stable for up to 28 days outside refrigeration. However, ensure it hasn't been exposed to heat above 30°C. If you're concerned after forgetting to refrigerate Wegovy in the UK, Cured Pharmacy can provide guidance and offer replacement pens from £69.
Will Wegovy still work if I forgot to refrigerate it?
Wegovy will still work if you forgot to refrigerate it, provided it hasn't been at room temperature for more than 28 days or exposed to extreme heat. The medication's effectiveness remains intact within these conditions. Cured Pharmacy recommends keeping a record of storage times and can supply fresh pens quickly if needed.
Where can I get replacement Wegovy after a storage mistake in the UK?
Cured Pharmacy offers the cheapest UK price for replacement Wegovy pens from £69, with £20 off your first order using code WEIGHTLOSSNEW. If you forgot to refrigerate Wegovy and need a replacement, our UK-registered prescribers can issue a new prescription after a quick online consultation with fast delivery.
How long can Wegovy stay out of the fridge before it goes bad?
Wegovy can be stored at room temperature (below 30°C) for up to 28 days once opened. If you forgot to refrigerate Wegovy UK for more than 28 days total, or if exposed to heat above 30°C, you should discard the pen. Cured Pharmacy offers replacement pens from £69.00 with fast UK delivery.
Will my Wegovy still work if I left it out of the fridge?
If your Wegovy pen was left out briefly and shows no discolouration or particles, it should still be effective. However, prolonged exposure to heat can reduce potency. Cured Pharmacy advises inspecting the solution carefully and consulting our clinical team if you forgot to refrigerate Wegovy UK for an extended period.
Can I get a replacement Wegovy pen quickly if mine was left out too long?
Yes, Cured Pharmacy offers next-day delivery on replacement Wegovy pens from £69.00 across the UK. Our online consultation takes minutes, and a UK-registered prescriber will review your order the same day. Use code WEIGHTLOSSNEW for £20 off your first order.
Is Wegovy from Cured Pharmacy the cheapest UK price if I need a replacement pen?
Yes, Cured Pharmacy offers Wegovy from £69.00, making it one of the cheapest UK prices available online. All orders include a free consultation with a UK-registered prescriber, discreet packaging, and fast delivery nationwide.
What happens if I forgot to refrigerate Wegovy in the UK overnight?
If you forgot to refrigerate Wegovy overnight at room temperature (below 30°C), it is generally still safe to use. Wegovy can be stored at room temperature for up to 28 days. However, if it has been exposed to heat above 30°C or direct sunlight, contact Cured Pharmacy for guidance on whether the pen is still viable.
Can I still use Wegovy if it was left out of the fridge for a week?
Wegovy may still be used if left unrefrigerated for up to 28 days at room temperature (below 30°C). If it has been longer than 28 days or stored above 30°C, the medication may have lost its effectiveness and should be replaced. Cured Pharmacy can provide a replacement pen and advise on safe storage for your next supply.
How can I tell if my Wegovy pen is still good after being left out?
Check the liquid inside the Wegovy pen is clear and colourless with no particles or discolouration. If the solution appears cloudy, discoloured, or contains particles, do not use it. If you are unsure whether your pen is still effective after being left unrefrigerated, contact Cured Pharmacy for a replacement and further advice.
Will my Wegovy work properly if I forgot to refrigerate it once?
Yes, Wegovy will still work properly if you forgot to refrigerate it once, provided it was left at room temperature for less than 28 days and kept below 30°C. Single accidental exposures to room temperature typically do not damage the medication. If you have concerns about your pen's storage, Cured Pharmacy pharmacists can assess whether it is still safe to use.
Can I get a replacement Wegovy pen if mine was stored incorrectly in the UK?
Yes, Cured Pharmacy can provide a replacement Wegovy pen if yours was stored incorrectly and may no longer be effective. Contact the pharmacy team with details of how long the pen was left unrefrigerated, and they will arrange a replacement prescription and delivery at the cheapest UK price from £69.00.
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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