Do you put Wegovy in the fridge — and what happens if you don't?

What does 'keep Wegovy in the fridge' actually mean in practice?

Semaglutide is a biological medicine, a protein-based compound that degrades when exposed to heat, freezing temperatures or prolonged light. That is why the packaging says 2–8°C. In everyday terms: the fridge shelf, not the door (temperatures fluctuate near the door), and nowhere near the ice-making section. If you travel, a cool bag with an ice pack is fine, though the ice pack itself should not touch the pen directly. Keeping the pen in its original cardboard carton matters too, because the carton filters light as well as making the pen easier to handle.

Many people keep their current pen in the fridge door out of habit, and our guide to whether you have to put Wegovy in the fridge explains exactly why moving it to a middle shelf, where the temperature stays steadier, is genuinely worth the small effort. A small practical detail, but biological medicines are sensitive in ways that paracetamol simply is not.

For a fuller explanation of how semaglutide works as a weight-loss treatment, the Wegovy treatment overview covers the mechanism and clinical background in plain language.

Can you leave Wegovy out of the fridge, and for how long?

The short answer is yes, temporarily, but the time limit matters and it is not the same across all GLP-1 medicines. For Wegovy, the licensed position as stated in the SmPC and Patient Information Leaflet is that a pen can be kept at room temperature (up to 30°C) for a defined maximum number of days. That figure is specified in your leaflet. We do not repeat a specific day count here because the approved information is the source to trust, and citing an internet page over your leaflet creates confusion when clinical decisions are involved.

What is clearly established: once that room-temperature window closes, a pen that has not been used must be discarded. Returning a pen to the fridge does not reset the clock. Questions about whether you can put Wegovy back in the fridge after it has been left out are worth reading through carefully, because the answer depends on how long it has been out and at what temperature.

Planning around your supply can reduce the risk of accidentally losing a pen to a storage error. Some patients find it helpful to think about holidays, bank holidays and work travel well in advance, a pen arriving on a Friday before a long weekend can sit in transit longer than usual, so ordering with time to spare is sensible. If timing matters to you, the Wegovy cost and supply page covers how private dispensing and delivery timelines work.

What should you do if you think your Wegovy has been stored incorrectly?

Do not use a pen you suspect has been compromised. Signs that something may be wrong include a pen that was left in a hot car, a parcel that sat on a doorstep in summer heat for hours, a pen that has accidentally frozen (this can happen in some fridge compartments), or a pen that looks discoloured or cloudy when you inspect the liquid through the viewing window. Semaglutide solution should be clear and colourless to slightly yellow. Any change in appearance is a reason to contact your pharmacist before injecting.

For people getting Wegovy through a clinical service, the right first step is always to contact your prescriber or pharmacy team. They can advise whether the pen should be replaced. Do not try to compensate for a potentially degraded dose by injecting more; the prescriber decides dosing, and our Wegovy click calculator can help you understand how doses are measured if you have questions about what you are injecting. You can also report any suspected product quality issue through the MHRA Yellow Card scheme, which handles medicine quality concerns as well as side-effect reports.

Storage questions are among the most common practical queries our prescribers field, so if something feels off, it is always reasonable to ask. You can find more detail on why Wegovy's fridge storage requirements exist and how the rules compare across different semaglutide formulations.

Does the Wegovy tablet (oral semaglutide) also need refrigerating?

No. This is one of the meaningful practical differences between the injection and the oral form. The Wegovy tablet, approved by the MHRA in June 2026 as the first oral GLP-1 weight-loss medicine in the UK, is stored at room temperature. No fridge required. That makes it considerably more straightforward for people who travel frequently, live in shared accommodation, or simply find cold-chain logistics stressful.

The trade-off is in how the tablet must be taken: first thing in the morning, on a completely empty stomach, with a small amount of plain water, and with at least 30 minutes before any food, drink other than plain water, or other oral medicines. The oral form has its own set of instructions that are just as important to follow as the fridge rule is for the injection. For a broader look at how the injection and tablet compare on convenience, effectiveness and eligibility, the weight-loss treatment overview is a useful starting point.

If you are considering Wegovy and want to discuss which form might suit your lifestyle, a prescriber can talk through the options as part of a clinical assessment. That conversation is where questions like "I travel every other week" or "I hate needles" belong, and at nume, checking your eligibility starts the process at no cost.