Wegovy Storage: What the Guidelines Generally Cover
Wegovy (semaglutide) is a prescription-only, once-weekly injectable medicine supplied in pre-filled pens. According to prescribing information, unopened pens should be stored in a refrigerator (typically around 2°C to 8°C) and protected from light. Once a pen is in use, or if refrigeration is temporarily not available, it can often be stored at room temperature below a specified upper limit — but always verify the exact duration and temperature threshold in your own leaflet or on the electronic Medicines Compendium (eMC), rather than relying on a remembered figure.
Things to avoid regardless of storage location
- Freezing: a pen that has been frozen should not be used — freezing can damage the medicine.
- Direct sunlight and heat: do not leave pens in a hot car, on a windowsill, or near a radiator.
- Refrigerator door storage: the door fluctuates in temperature more than the main body of the fridge, so the main shelf is generally preferable.
If you are travelling and refrigeration is temporarily unavailable, a cool bag or insulated pouch can help — but again, refer to your leaflet for the specific guidance that applies to your pen. If you are unsure whether a pen has been stored correctly, speak to your prescriber or pharmacist before using it.
If you are also using Mounjaro and wondering about storage rules for that pen, see our guides on leaving Mounjaro out of the fridge and how Mounjaro should be refrigerated for a comparable overview.
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Keeping Track of Your Pens with GLP Trackr
One practical way to stay on top of storage is to log each injection as soon as you take it. GLP Trackr's dose logging feature lets you record the date, time, and dose strength of every shot — so you always know exactly when a pen was first used and how long it has been out of the fridge. That record can help you cross-check against the timeframe in your leaflet without relying on memory.
The app's dose reminders also mean you are less likely to leave a pen sitting forgotten on a shelf; a gentle prompt on injection day keeps your weekly schedule on track. And if you ever have a concern about a pen's storage history to raise with your prescriber, the injection log gives you accurate dates to bring to that conversation.
For a broader look at managing your Wegovy journey — including side-effect tracking and progress insights — visit our GLP-1 medication tracker hub. If you have ever noticed changes in mood while on Wegovy, you may also find it useful to read about Wegovy and low mood.
If you are ever uncertain whether your pen is still safe to use after being stored outside the fridge, contact your prescriber, pharmacist, or healthcare professional before injecting — they are best placed to advise based on your specific situation.
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Frequently asked questions.
An in-use Wegovy pen can generally be kept at room temperature for a limited period, but the exact duration and temperature limit should be confirmed in the patient information leaflet or the eMC entry for your pen — do not rely on a remembered figure.
Exposure to excessive heat or direct sunlight may degrade the medicine. If you think your pen has been stored incorrectly, speak to your pharmacist or prescriber before using it rather than assuming it is still safe.
No. Wegovy pens should not be frozen. A pen that has been frozen should not be used. Always store unopened pens in the main body of a refrigerator (typically 2°C to 8°C), away from the freezer compartment.
Logging your injection date in GLP Trackr the moment you first use a pen gives you an accurate record. You can then cross-check that date against the room-temperature storage window in your leaflet without relying on memory.
The most reliable sources are the patient information leaflet supplied with your pen and the Wegovy entry on the electronic Medicines Compendium (eMC) at medicines.org.uk. Your pharmacist can also clarify the storage rules for your specific pack.