Overview
A Wegovy® pen supplied through MedExpress is designed to provide 4 weekly doses, and how long it remains safe to use after that depends on whether it's still unopened or already in use, and how it has been stored.
Use this article when you want to:
Find out how long an unopened Wegovy® pen can be used
Find out how long an opened Wegovy® pen remains safe to use
Understand how refrigerated and room-temperature storage affect a Wegovy® pen's shelf life
How Long Does an Unopened Wegovy® Pen Last?
Refrigerated storage (2°C to 8°C): if an unopened Wegovy® pen is stored in a refrigerator between 2°C and 8°C, it can be used until the expiry date printed on the label.
Room-temperature storage (below 30°C): if an unopened Wegovy® pen is stored outside the refrigerator at temperatures not exceeding 30°C, it can be used for up to 42 days (6 weeks).
How Long Does an Opened or Used Wegovy® Pen Last?
Once a Wegovy® pen has been opened or used, all remaining doses must be used within 42 days (6 weeks) of first use, regardless of whether the Wegovy® pen is:
Stored in a refrigerator (2°C to 8°C), or
Stored at room temperature below 30°C.
For full storage guidance — including what to do if your MedExpress Wegovy® pen is exposed to extreme temperatures — see "How should I store my Wegovy pens?"