Wegovy and refrigeration: what the storage rules actually mean

Step 1: from the pharmacy to your fridge door

When your Wegovy pen arrives (tracked, in plain packaging the next working day if you order through a GPhC-registered pharmacy) it should go straight into the fridge. The target temperature range is 2°C to 8°C, which is the standard middle shelf of most domestic fridges. If you want a full answer to whether Wegovy has to be refrigerated, including the reasoning behind the cold-chain requirement, that guide covers it in detail. Keep the pen in its original carton to protect it from light, and check that nothing in the fridge is pressing against it, since freezing even part of a pen renders it unusable.

It is also worth confirming on delivery that the pen feels appropriately cool and the liquid inside looks clear and colourless. The NHS patient information for semaglutide notes you should not use the medicine if the solution is cloudy, discoloured, or contains visible particles. If anything looks wrong, contact your pharmacy before injecting.

For a fuller look at what happens when a pen misses the cold chain, the guide on what happens if Wegovy is not refrigerated covers the deterioration process in plain terms.

Step 2: the room-temperature window, what it is and how to use it

Novo Nordisk's licensed product information allows Wegovy pens to be stored outside the fridge for a defined period, which makes the treatment practical for people who travel, work long hours, or simply want a pen in their bag on injection day. The exact number of days in this window is stated in the Patient Information Leaflet enclosed with your pens. That figure takes precedence over anything published elsewhere, because it reflects the most current approved data for your batch.

A few practical points follow from this. First, the room-temperature clock starts the first time the pen leaves refrigerated storage, it does not reset. Second, "room temperature" in this context means up to approximately 30°C; leaving a pen on a sunny windowsill or in a hot car goes well beyond that. Third, once the window closes, refrigerating the pen again does not extend or reset it. If you are uncertain whether the window has passed, the safest course is to contact your prescriber. The detail on how long a Wegovy pen can be kept refrigerated before use is a related question worth reading alongside this.

For anyone using the upper arm as an injection site, warming the pen to room temperature for a few minutes before injecting can make the process more comfortable, see the guidance on Wegovy upper arm injection technique for more detail.

Step 3: injection day and post-use storage

On the day of your weekly injection, take the pen out of the fridge and allow it to reach room temperature for about 30 minutes, a habit that slots neatly in before the kettle boils if you inject in the morning. Do not try to warm it using hot water, a microwave or direct heat; the medicine degrades with heat just as it does with freezing.

After injecting, recap the pen and return it to the fridge if doses remain. Wegovy pens are pre-filled, multi-dose devices, so each pen holds four weekly doses at the standard doses up to 2.4mg. Keeping used pens refrigerated between injections is part of the same storage rule that applies throughout treatment.

Needles should be changed with every injection and disposed of immediately into a purpose-built sharps container, never into household waste. Used pens themselves also require sharps disposal once empty. If you are starting Wegovy and want a broader picture of how the treatment works before thinking about storage logistics, the Wegovy overview covers the full picture from licence to titration schedule.

Travelling and edge cases

Short trips and holidays do not have to disrupt treatment, provided the room-temperature window is respected. For longer journeys, an insulin travel wallet or cool bag with an ice pack (the pen should not touch the ice directly) keeps the pen within range. Airlines permit injectable prescription medicines in hand luggage, carry your prescription or dispensing label and, ideally, a letter from your prescriber. If you are away for longer than the room-temperature window allows, refrigerator access at your destination is necessary.

People sometimes ask whether Wegovy storage differs from Ozempic's storage requirements. Both contain semaglutide and share the same cold-chain principle, but Ozempic is licensed for type 2 diabetes, not weight management, a prescriber would not issue it for weight loss through a legitimate UK route. The licensed weight-management medicine is Wegovy, and its storage rules are the ones that apply here.

If you have questions about storage that your Patient Information Leaflet does not resolve, our prescribers can help, contact the aftercare team seven days a week. The Wegovy SmPC on the electronic Medicines Compendium is also freely searchable and contains the definitive storage conditions for the licensed product.

Semaglutide for weight management is a prescription-only medicine. If you are considering treatment, start your free consultation with our clinical team, a GPhC-registered prescriber reviews every application the same day.