Short answer: yes — the refrigerator is Wegovy®'s default home. Unlike some other GLP-1 devices, Wegovy® ships in one format only: a single-dose pen, so there's just one storage rule set to keep straight, not several. Getting it right matters: semaglutide is a temperature-sensitive medication, and heat or freezing can damage it in ways you can't see.
The short answer
Store Wegovy® in the refrigerator at 36–46°F. If needed, an unused pen can sit at room temperature (up to 86°F) for up to 28 days total, in its original carton — then it must be discarded. That 28-day clock starts the moment a pen leaves the fridge and never resets, even if you put it back. Never use a Wegovy® pen that has frozen.
The default rule: refrigerate at 36–46°F
Every Wegovy® pen ships and stores refrigerated at 36–46°F (2–8°C). Keep it in the original carton to protect it from light, toward the middle of the fridge rather than against the back wall — the rear of many refrigerators runs cold enough to freeze, and a frozen pen must be thrown away even after it thaws. Don't store it in the door either, where the temperature swings every time it opens.
Wegovy® comes in five dose strengths, and during dose escalation it's common to have two strengths in the fridge at once — check the label before every injection, not just the shelf you grabbed from.
The room-temperature window: 28 days
If you need to keep a pen out of the fridge — travel, a broken refrigerator, a shipment that arrives while you're away — it can be stored at up to 86°F for up to 28 days, in its original carton. The clock starts the moment it leaves refrigeration and doesn't reset: putting it back in the fridge doesn't recover any days. Mark the date on the carton, and discard the pen after day 28 if it's still unused.
If you're not sure how long a pen has been out, or the timeline is fuzzy, don't guess — call your pharmacy before injecting.
Heat is the real enemy
86°F is the ceiling, and everyday situations blow past it quickly:
- A parked car can pass 100°F within minutes on a warm day, even with windows cracked. A pen that rode in a hot trunk or sat in a sun-baked mailbox may be compromised.
- Direct sunlight on a countertop or windowsill can overheat a pen even in an air-conditioned room.
- A checked suitcase can experience both heat on the tarmac and freezing at altitude — one reason medication always travels in your carry-on.
Heat damage isn't visible. If your Wegovy® pen has plausibly been above 86°F, call your pharmacist before using it — describing what happened takes two minutes and removes the guesswork.
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- Always carry it on. Checked baggage exposes medication to temperature extremes and the risk of loss. TSA permits injectable medications and their needles in carry-on bags — keep everything in its original labeled packaging, and tell the officer you're carrying medication if asked.
- Use an insulated case for long travel days. A small medication cooler keeps the temperature stable. If you use ice packs, keep a barrier between them and the medication so it can't freeze against them.
- Trips under 28 days usually need no fridge at all, as long as you stay under 86°F. Mark the date each pen left refrigeration so you can track the window.
- Crossing time zones? Wegovy® is a weekly medication, so the dose day matters far more than the hour. If a trip complicates your schedule, message your provider before you leave rather than improvising.
What about compounded semaglutide?
The rules above are for FDA-approved Wegovy® from Novo Nordisk. Compounded semaglutide is a different product prepared per-patient by a compounding pharmacy: compounded medications are not FDA-approved, are not generic versions of brand-name drugs, and have not been evaluated by the FDA for safety, efficacy, or quality — and their storage rules are set by the pharmacy that prepared yours, not by the Wegovy® label. Follow the storage instructions and beyond-use date printed on your own pharmacy label, and call that pharmacy with any storage questions.
When to call your provider or pharmacist
Call before injecting if your pen froze, spent time above 86°F, looks cloudy or discolored, has particles floating in it, or has been out of the fridge longer than its window allows. And if a storage mishap means you'll miss your weekly dose, message your provider for guidance on getting back on schedule — don't double up.
Using a different device? See our step-by-step guide to the Wegovy® pen, the Ozempic® pen, or our storage guide for Zepbound®, and check current availability in your state in the GLP-1 state directory.
Frequently asked questions
An unused pen can be kept at room temperature (up to 86°F) for up to 28 days total, in its original carton, after which it must be discarded. Wegovy® ships only as a single-dose pen — there's no multi-dose or vial format with a different rule to track.
Returning it to the fridge doesn't reset the clock. The 28-day window starts when the pen first leaves refrigeration and keeps counting regardless of where it's stored afterward. Mark the date it came out, and if you're unsure how long it's been, call your pharmacist before using it.
Throw it away — even after it thaws and even if it looks normal. Freezing can damage the medication in ways you can't see. This is also why you shouldn't store it against the back wall of the refrigerator or directly against ice packs while traveling.
Possibly not. The storage ceiling is 86°F, and a parked car can exceed 100°F within minutes even on a mild day. Heat damage isn't visible, so don't judge by appearance — call your pharmacist, describe how long it was exposed and roughly how hot it was, and let them advise before you inject.
Always in your carry-on, never checked luggage — cargo holds swing between heat and freezing. TSA permits injectable medications and their needles in carry-on bags; keep everything in its original labeled packaging. For long travel days, an insulated medication case keeps the temperature stable — just keep a barrier between the medication and any ice packs so it can't freeze.
Not necessarily. The rules on this page come from the FDA-approved Wegovy® label. Compounded semaglutide is prepared per-patient by a compounding pharmacy — it is not FDA-approved, is not a generic version of a brand-name drug, and has not been evaluated by the FDA for safety, efficacy, or quality — and its storage requirements and beyond-use date are set by the pharmacy that prepared it. Follow your own pharmacy label and call that pharmacy with storage questions.
References
Storage temperatures, room-temperature windows, and in-use handling follow the FDA-approved Wegovy® prescribing information and Instructions for Use. Always follow the specific instructions in your carton and on your pharmacy label.
- Novo Nordisk. WEGOVY® (semaglutide) prescribing information and Instructions for Use. 2026.
Bottom line: Refrigerate Wegovy® at 36–46°F by default. An unused pen gets one 28-day room-temperature window that never resets once it's left the fridge. Never use it frozen, treat 86°F as a hard ceiling, fly with it in your carry-on — and when in doubt, call your pharmacist instead of guessing.
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A licensed Pallas provider can review your plan and answer storage and dosing questions — usually by message, no appointment required.
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