What the Ozempic, Wegovy, Mounjaro, and Zepbound prescribing information says about refrigeration: unopened pens at 2 to 8 °C. Not medical advice.
Key points
- 01Unopened pens are stored refrigerated (2 to 8 °C). The Ozempic, Wegovy, Mounjaro, and Zepbound prescribing information describes storing unopened pens refrigerated at 2 to 8 °C (36 to 46 °F). That is the manufacturer-documented condition until first use.
- 02Never freeze the pen. Every GLP-1 prescribing information describes discarding a frozen pen. Freezing alters the protein structure of semaglutide and tirzepatide. Do not store the pen against the back wall or cooling element of the refrigerator, where it can freeze.
- 03A fixed time-out-of-fridge window applies after first use. Ozempic: up to 56 days at room temperature below 30 °C or refrigerated, per the label. Wegovy: up to 28 days. Mounjaro and Zepbound: up to 21 days. The window starts when the pen first leaves refrigeration. Always verify the current package insert.
- 04Mark the date the pen first left the fridge. Because the room-temperature window starts at first removal, the Instructions for Use describe writing that date on the carton. This lets you identify the discard day reliably, regardless of how the pen was stored afterward.
- 05Let a refrigerated dose warm before injecting. GLP-1 pen Instructions for Use describe a refrigerated dose as more uncomfortable to inject. A room-temperature dose is associated with less stinging in the patient-education literature. The out-of-fridge window permits this adjustment.
- 06Keep the pen below 30 °C and away from direct heat. The documented upper limit for room-temperature storage is 30 °C (86 °F). A car in summer sun, a windowsill, or a hotel room with broken air conditioning can exceed it. Sustained heat above 30 °C is the variable that actually pushes a pen out of spec.
- 07Replace the cap and remove the needle. The Instructions for Use describe removing the needle after each use and replacing the cap. A needle left attached can let air into the cartridge and cause leaking or inaccurate dosing. See the guide on how to dispose of needles safely for disposal.
- 08For travel, a simple cooling pouch is often enough. For trips inside the time-out-of-fridge window, a cooling pouch is optional. For long ground time in hot climates, an evaporative pouch holds contents at roughly 18 to 26 °C. The flying with GLP-1 medications guide covers airport security and cooling cases.
Frequently asked questions
Does Ozempic need to be refrigerated?+
Unopened Ozempic pens are stored refrigerated at 2 to 8 °C (36 to 46 °F) per the prescribing information. After first use, the label permits room-temperature storage below 30 °C or refrigeration for up to 56 days. Verify against the current package insert.
How long can Ozempic be left out of the fridge?+
The Ozempic prescribing information describes a window of up to 56 days at room temperature below 30 °C (86 °F) after first use. The window starts when the pen first leaves refrigeration, not at each individual dose.
Is it the same for Wegovy, Mounjaro, and Zepbound?+
The windows differ. Wegovy: up to 28 days. Mounjaro and Zepbound: up to 21 days, each at room temperature up to 30 °C after first removal from the fridge. Unopened pens of all four are stored refrigerated at 2 to 8 °C. The authoritative source is each current FDA label.
What happens if Ozempic was frozen?+
The prescribing information describes discarding a frozen pen; it must not be used. Freezing alters the protein structure of the active ingredient. Do not store the pen against the cold back wall of the refrigerator.
Is a pen still usable after a day at room temperature?+
As long as the temperature stays at or below 30 °C, the pen remains inside its documented time-out-of-fridge window. A single day at 25 to 28 °C is well within these windows. Sustained heat above 30 °C is the reason to discard a pen.
