Do you have to keep Wegovy in the fridge?

You've just had your Wegovy delivered, here's what to do in the next ten minutes

The pen arrives cold for good reason. Semaglutide is a biological medicine: it degrades if it freezes or overheats, and a damaged pen will not work as the trials showed it should. The moment the box lands with you, move the unused pens to the fridge. Keep them in the original carton so they are shielded from light, and place them away from the ice-making section or freezer drawer, anything that risks contact with ice will destroy the medicine. The full Wegovy overview on our site covers what to expect once treatment is underway, but for storage the immediate step is simply: fridge, not freezer, still in the box.

Temperature at home matters more than most people expect. A fridge thermostat that drifts above 8°C, or a habit of leaving the pen on the kitchen counter for a few days, can compromise the medicine. If you are unsure whether a pen has been stored correctly, contact your prescribing team rather than injecting it and hoping for the best. The NHS semaglutide medicine guide reinforces that improperly stored pens should not be used.

Once a pen is in use: the room-temperature rule explained

A question our prescribers hear most weeks is whether the pen has to go back in the fridge between doses. The honest answer is: it can stay at room temperature for a defined period, but the exact number of days is stated in your Patient Information Leaflet and it is not the same across every batch or formulation, so we deliberately do not print a figure here that might override your leaflet. What is consistent is the upper limit: no warmer than 30°C. Leave a pen on a south-facing windowsill in July and you have likely exceeded that.

If you use alcohol swabs to clean the injection site before each dose, keep those and the pen together somewhere cool and dark, away from direct sun. Practical tip: a small, opaque washbag in a bedroom drawer works well for the in-use pen during the room-temperature window. Once that window closes, any remaining doses in an unfinished pen should be discarded, the SmPC and Patient Information Leaflet are the authoritative source on this, and your prescriber can clarify if you are unsure. For more detail on how the storage rules interact with how long you can leave a pen out, our page on keeping Wegovy out of the fridge goes further.

Travel, holidays and situations where a fridge is harder to guarantee

Travelling with Wegovy takes a little planning. Airlines generally allow pre-filled biological pens in hand luggage with a doctor's letter or a copy of your prescription, and travel cooler bags with ice packs will maintain the 2–8°C range for several hours. If you are wondering whether you have to put Wegovy in the fridge at your destination, the short answer is yes for unused pens, but minibars vary enormously and some run far colder than 2°C. Freezing is as damaging as overheating.

For longer trips, the room-temperature window (again, consult your leaflet for the specific days) can actually make short breaks easier if the timing works out. On longer journeys, a medical-grade travel cooler is a better investment than hoping for the best. If you are curious about how Wegovy storage compares with other semaglutide products, our page on whether semaglutide needs refrigeration covers the category more broadly. The Wegovy SmPC on the eMC is the definitive technical reference if your question goes beyond what a patient leaflet covers.

One situation that catches people out: returning home after a weekend away to find the pen has been sitting at 28°C for 48 hours. Whether that is still within the permitted window depends on the leaflet's stated days, and our guidance on how to store Wegovy in the fridge correctly can help you assess what to do when you get back. Do not guess with a biological medicine.

If you use the oral Wegovy tablet: no fridge needed

The semaglutide tablet (the oral formulation, approved in the UK in June 2026) stores at room temperature throughout, no refrigeration at any stage. That is a meaningful practical difference if cold-chain logistics feel daunting, or if you travel frequently. Our weight-loss treatment overview explains both the injection and tablet options and how a prescriber decides which may be more appropriate for you. For context on how to access semaglutide treatment through a clinically regulated route, the where to buy Wegovy page walks through your options honestly, including what to look for when verifying an online pharmacy. If Wegovy is something you are considering and you have not yet spoken to a prescriber, a free consultation with our clinical team is the practical next step.