Mounjaro and Wegovy Storage: What You Need to Know
Mounjaro (tirzepatide) pens are designed to be stored in a refrigerator at around 2°C to 8°C. This applies before first use and while you are working through a course of pens. Wegovy (semaglutide) carries the same general refrigeration requirement — check your own patient information leaflet or the electronic Medicines Compendium (eMC) for the precise figures that apply to your specific product, as these are the authoritative source.
Can Mounjaro be kept out of the fridge?
Once removed from the fridge, Mounjaro pens can generally be kept at room temperature for a limited period — but the exact timeframe varies by product version and packaging. Rather than relying on a recalled figure, always check the leaflet that came with your pen or the eMC entry for your specific strength and batch. If you are unsure whether a pen has been stored correctly, speak to your pharmacist or prescriber before using it.
Temperature matters
Exposure to extreme heat, freezing temperatures, or direct sunlight can affect the medicine. Mounjaro should not be frozen — if a pen has been frozen, do not use it. Keep pens away from the freezer compartment at the back of the fridge, and away from sunny windowsills or hot car interiors when travelling.
For a closer look at the specific numbers, see our detailed guide on what temperature Mounjaro should be stored at. If you have already had a storage mishap, the guides on leaving Mounjaro out of the fridge overnight and whether you can put Mounjaro back in the fridge cover those situations in more detail.
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Knowing a pen has been stored correctly is only half the picture — you also need to remember when you used it, which dose strength it was, and when your next injection is due. That is where GLP Trackr helps.
The app's dose logging feature lets you record every injection — the date, time, and dose strength — so you always have a clear record of where you are in your treatment. Combined with dose reminders, it means a weekly injection is far less likely to be missed or accidentally delayed because you lost track of the schedule.
If you ever have a concern about a pen — whether it was stored at the wrong temperature or left out longer than expected — logging the event in the app gives you something concrete to discuss with your prescriber at your next appointment, rather than relying on memory.
If anything about your medication storage or condition worries you, contact your pharmacist or prescriber promptly. They can advise on whether a pen is still suitable to use — that decision should never be made by guesswork. You can find more storage guidance in our Mounjaro overview.
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Frequently asked questions.
Yes. Mounjaro pens should be stored in a refrigerator at around 2°C to 8°C before use. Always check the patient information leaflet or the electronic Medicines Compendium for the exact storage guidance for your specific pen and strength.
Yes. Like Mounjaro, Wegovy pens are generally stored refrigerated at 2°C to 8°C. Check the leaflet supplied with your pen or the eMC for precise instructions, as details can vary by product version.
Mounjaro pens can typically be kept at room temperature for a limited period once removed from the fridge, but the exact timeframe depends on your specific product. Check your patient information leaflet for the figure that applies to your pen, and ask your pharmacist if unsure.
Mounjaro is generally stored at 2°C to 8°C in a refrigerator. It should not be frozen. For travel or short-term out-of-fridge storage, check your leaflet or the eMC for the specific temperature limits that apply to your pen.
Do not use a pen that has been frozen, exposed to extreme heat, or stored outside the recommended conditions without first checking with your pharmacist or prescriber. They can advise whether the pen is still suitable to use.