I Forgot to Refrigerate My Wegovy — What Should I Do?

Wegovy (semaglutide) is a biological medicine supplied in a pre-filled injection pen. Like many biological medicines, it needs to be stored correctly to remain effective — and heat or prolonged time outside the recommended temperature range can affect the medicine inside the pen.

Refrigerated storage

Wegovy pens are typically stored in a refrigerator (around 2–8 °C) until you are ready to use them. Keeping them in the fridge from the point of dispensing until use is the standard recommendation in the product information.

Room-temperature use

The patient information leaflet and the electronic Medicines Compendium (eMC) include guidance on how long a pen may be kept at room temperature — typically for a defined number of days and below a specified temperature threshold. Rather than relying on a recalled figure here, check your own leaflet or the eMC entry for Wegovy for the precise timeframe, as this is the safest approach.

Signs a pen may be compromised

If a pen has been left in excessive heat (such as a hot car or direct sunlight), or has been unrefrigerated for longer than the leaflet allows, the general guidance is not to use it. Inspect the solution — if it looks discoloured, cloudy, or contains particles, do not inject it. In any case of doubt, speak to your prescriber or pharmacist before using the pen.

If you are thinking about related questions on your Wegovy or Mounjaro journey — such as whether timing flexibility applies to similar medicines — the same principle holds: always let your prescriber guide decisions that affect your treatment.

One of the most useful things you can do after any disruption to your routine — including a storage mishap — is to keep an accurate record of what happened, so you can discuss it clearly with your prescriber or doctor at your next contact.

GLP Trackr's dose logging feature lets you record every injection: the date, time, and dose strength, so there is never any ambiguity about where you are in your weekly schedule. If you had to discard a pen or delay a dose, logging that in the app gives you a clear, timestamped note to bring to your next appointment rather than trying to recall the details later.

The app also includes dose reminders, which can help prevent the kind of routine disruption — such as travelling without a cool bag — that leads to storage questions in the first place. And if you are navigating questions about your wider journey, such as what life on a GLP-1 medicine actually looks like day to day, the community and check-in features can help you feel supported rather than alone.

For a broader understanding of how GLP-1 medicines work and what to expect, the Mounjaro guide covers many of the common questions people have during treatment — much of which applies to the GLP-1 class more generally.

Important: GLP Trackr helps you record and track your journey — it is not a substitute for advice from your prescriber or pharmacist. If you are genuinely unsure whether a pen is safe to use, always contact your healthcare professional before injecting. Never use a pen you have doubts about.

Keep your injection records clear and your routine consistent — download GLP Trackr on the App Store or Google Play and try it free for 7 days.