How to Store GLP-1 Pens: The Full Table, Plus Travel and Heat

There is no single GLP-1 storage rule. There are at least seven, and which one applies to you depends not on your drug but on the exact device in your hand.

The same molecule, under the same brand name, can carry a 28-day out-of-fridge allowance in one presentation and a 56-day allowance in another. Tirzepatide’s allowance is 21 days, and it is cumulative. Two products need no refrigeration at all.

This article puts every rule in one place, taken from the FDA-approved labels, and then deals with the two situations the labels do not fully cover: heat and travel. It describes what the labels say. It is not medical advice, and if something has happened to your medication, your pharmacist or the manufacturer is the right call.

What is every GLP-1 storage rule, in one table?

Product and presentation	Before first use / unopened	Out-of-fridge allowance	Range
Ozempic multi-dose pen	Refrigerate to expiration	56 days after first use	59–86 °F (15–30 °C)
Ozempic single-dose prefilled syringe	Refrigerate to expiration	28 days	46–86 °F (8–30 °C)
Wegovy single-dose pen	Refrigerate	28 days before cap removal	46–86 °F (8–30 °C)
Wegovy HD 7.2 mg pen	Refrigerate	28 days before cap removal	46–86 °F (8–30 °C)
Wegovy single-dose prefilled syringe	Refrigerate	28 days before cap removal	46–86 °F (8–30 °C)
Wegovy FlexTouch multi-dose pen	Refrigerate	56 days after first use	59–86 °F (15–30 °C)
Zepbound / Mounjaro single-dose pen or vial	Refrigerate	21 days total	up to 86 °F (30 °C)
Zepbound / Mounjaro multi-dose vial or KwikPen, unopened	Refrigerate to expiration	30 days	up to 86 °F (30 °C)
Zepbound / Mounjaro multi-dose vial or KwikPen, opened	—	30 days from first use, 30 days total at room temp, or 4 doses	up to 86 °F (30 °C)
Saxenda / Victoza (liraglutide) pen	Refrigerate	30 days after first use	per label
Rybelsus / Ozempic tablets / Wegovy tablets	—	No refrigeration	68–77 °F, excursions 59–86 °F
Foundayo (orforglipron)	—	No refrigeration	68–77 °F, excursions 59–86 °F, protect from light

Sources: the Ozempic [1], Wegovy [2], Zepbound [3], Foundayo [4] and Saxenda [5] labels.

Three rules apply to every injectable on that list, without exception [1][2][3]:

1. Do not freeze, and do not use it if it has been frozen.
2. Do not store it directly adjacent to the refrigerator’s cooling element. This is named in the labels because it is how pens freeze by accident.
3. Keep it in the original carton until administration, to protect it from light.

Why does Ozempic get 56 days and Wegovy only 28?

Because the question is not really about the drug. It is about whether the device is a multi-dose pen that has been started or a single-use device that has not been opened.

A multi-dose pen — the Ozempic prefilled multi-dose pen, or the Wegovy FlexTouch — has an “in-use” period that begins at first injection. The label gives 56 days at 59 to 86 °F or refrigerated from that point [1][2]. (Novo Nordisk uses “FlexTouch” as the device-platform name; in the US labeling it is part of the product name for Wegovy FlexTouch, while the Ozempic pen is called simply a prefilled multi-dose pen. The dose-counter mechanics are close cousins, but the names are not interchangeable.)

A single-dose device — a Wegovy pen, a Wegovy prefilled syringe, an Ozempic prefilled syringe — has no in-use period, because it is used once. Its 28-day allowance is a window before the cap is removed, after which it is meant to be used immediately [1][2].

That is also why the temperature floors differ. The multi-dose in-use range starts at 59 °F (15 °C), which is USP controlled room temperature. The single-dose range starts at 46 °F (8 °C), just above refrigerator temperature, because it is describing a pen sitting somewhere cool but not cold.

The practical consequence: if your pharmacy switches you between Wegovy presentations, your out-of-fridge allowance may halve without anyone mentioning it. The Wegovy label separately requires that a change of presentation trigger new training and a reading of the new Instructions for Use [2].

What is different about tirzepatide?

Two things, and both are easy to get wrong.

The allowance is 21 days, and it is cumulative. The Zepbound label says single-dose pens and vials may be stored unrefrigerated at temperatures not to exceed 86 °F “for up to a total of 21 days,” and then: “Discard single-dose pen and single-dose vial after a total of 21 days at room temperature” [3].

Total means across every excursion, not per trip. Take a pen out for a weekend three times and you have used some of the 21 days. The label gives no method for counting partial days, which is a genuine gap, and the conservative reading is to count any day the pen spent out of the fridge.

Opened multi-dose devices run three clocks at once. For an opened multi-dose vial or KwikPen, the label says to discard “after a total of 30 days at room temperature, 30 days after first use, or after taking 4 weekly doses, even if there is medicine left in it” [3].

Whichever expires first governs. In practice, four weekly doses is 28 days, so a device used on schedule usually runs out of doses just before it runs out of days. A device that sat unopened at room temperature for a while before you started it has already spent part of its 30-day room-temperature budget.

Unopened multi-dose devices are simpler: refrigerated, usable until the expiration date; at room temperature, discard after 30 days [3].

What happens if a pen gets too warm?

This is where the day counts stop helping.

Every room-temperature allowance in every GLP-1 label is capped at 86 °F (30 °C) [1][2][3]. Above that, the allowance does not apply at all. There is no “how many hours at 95 degrees is acceptable” number in any label, because the labels do not contemplate it.

The Wegovy Instructions for Use treats heat exposure as a discard trigger in its own right, separate from the calendar. It says to throw the pen away if it has been frozen, “has been exposed to light or temperatures above 86 °F (30 °C), or has been out of the refrigerator for 28 days or longer” [2].

The Ozempic Instructions for Use puts the same point as a practical instruction to the patient: “Always keep your pen with you. Do not leave it in a car or other place where it can get too hot or too cold” [1]. It also says the pen “should be protected from excessive heat and sunlight.”

So: a pen left in a car on a summer afternoon, a pen in a beach bag, a pen sitting in a window. None of those is covered by the day allowance, and none of the labels give you a way to judge whether a particular exposure was too much.

What to do if it happens. The labels do not offer a home test, and neither will we. Call your pharmacist or the manufacturer — Novo Nordisk at 1-888-693-6742 for Ozempic or 1-833-934-6891 for Wegovy, Lilly at 1-800-545-5979 for Zepbound and Mounjaro. They handle this question routinely.

What you should not do is assume it is fine because the medicine still looks clear. The labels do require a visual inspection before every injection, but a normal appearance is not evidence that a heat excursion did no harm.

What if it froze?

Do not use it.

Every label says the same thing, in almost the same words: do not freeze, and do not use the product if it has been frozen [1][2][3]. There is no thawing step and no salvage.

The labels also name the most common cause, which is not a freezer at all: “Do not store in the freezer or directly adjacent to the refrigerator cooling element” [1]. The back wall and the coldest shelf of a home refrigerator regularly drop below freezing. A middle shelf, in the carton, away from the back, is the practical answer.

The Zepbound KwikPen Instructions for Use says it as bluntly as it can be said: “Do not freeze your Pen. Throw away (discard) the Pen if it has been frozen” [3].

Can you inject it cold, straight from the fridge?

For Zepbound and Mounjaro, there is a direct manufacturer answer. The Zepbound pen Instructions for Use lists it among its commonly asked questions:

“What if my pen is not at room temperature? It is not necessary to warm the pen to room temperature.” [3]

For Ozempic and Wegovy, we could not find an equivalent published statement from Novo Nordisk. What the Novo documents do say is not to warm a prefilled syringe using any heat source such as hot water or a microwave [1][2]. If cold injections bother you, that is a reasonable question for your pharmacist, who can tell you what is acceptable for your specific product.

Do the tablets need any of this?

No, and it is the cleanest advantage the oral products have.

Oral semaglutide — Rybelsus, Ozempic tablets and Wegovy tablets — is stored at 68 to 77 °F (20 to 25 °C), with excursions permitted to 59 to 86 °F (15 to 30 °C), which is USP Controlled Room Temperature [1][2].

But there is one instruction people miss. The Wegovy label says to “store and dispense WEGOVY tablets in the original bottle. Store WEGOVY tablet in the original bottle until use to protect tablets from moisture. Store WEGOVY tablets in a dry place away from moisture” [2].

That rules out a weekly pill organizer and a bathroom medicine cabinet. The tablets stay in the bottle they came in.

Foundayo (orforglipron) is stored the same way with one addition: it is light sensitive. The label says to “protect from light by keeping in the original bottle and carton and replacing the cap each time after opening. If the carton is no longer available, store bottle away from light” [4]. The bottles include a desiccant and a child-resistant closure.

What is the label’s actual visual check before injecting?

Every injectable label requires a look before each dose, and the expected appearance is not the same across molecules [1][2][3]:

• Semaglutide (Ozempic, Wegovy) should be clear and colorless. The Ozempic label: “Do not use OZEMPIC if particulate matter and coloration is seen.”
• Tirzepatide (Zepbound, Mounjaro) should be clear and colorless to slightly yellow. “Do not use ZEPBOUND if particulate matter or discoloration is seen.”

A faint yellow tinge is expected in tirzepatide and not expected in semaglutide. Worth knowing if you have switched between them.

Air bubbles are a separate matter, and they are normal. The Zepbound pen IFU, the Ozempic prefilled syringe IFU and the Wegovy prefilled syringe IFU all say so explicitly, and the syringe documents add that you should not try to remove them [1][2][3].

How does storage change what you can do on a trip?

It sets the outer boundary, and the ceiling matters more than the calendar.

For a week in a cool climate, every product on the table has enough room. For three weeks somewhere hot, the numbers get tight fast — especially on tirzepatide, where 21 cumulative days is the allowance and any period above 86 °F is outside it entirely.

The label-backed points for travel:

• Carry it with you. The Ozempic IFU says not to leave the pen in a car or anywhere too hot or too cold [1]. A carry-on bag is temperature-controlled; a cargo hold and a car trunk are not.
• Keep it in the carton. Light protection is a label requirement across the board.
• Do not press a frozen gel pack against the pen. The labels forbid freezing and specifically warn against storing the product against the refrigerator cooling element. A frozen pack in direct contact is the same hazard.
• Carry a spare if you can. The Ozempic IFU: “Always carry an extra pen and new needles with you, in case of loss or damage” [1].
• Cooling packs are allowed through TSA. Frozen liquid items and gel packs are allowed through the checkpoint when frozen solid at screening, and TSA publishes a carve-out for medically necessary gel ice packs regardless of their physical state, with a request that you notify the officer [6].

Insulated medication cases are widely sold for this. No manufacturer endorses a specific one, advertised hold times are vendor claims, and we have not found independent testing. Testing a case at home before relying on it is the sensible move.

The short version

• Ozempic pen and Wegovy FlexTouch: 56 days out of the fridge after first use.
• Wegovy single-dose pens and syringes, Ozempic prefilled syringe: 28 days.
• Zepbound and Mounjaro single-dose pens and vials: 21 cumulative days.
• Zepbound and Mounjaro multi-dose vials and KwikPens: 30 days opened, or four doses.
• Every allowance stops at 86 °F. Above that, the calendar does not apply.
• Frozen means gone, in every label, with no exceptions.
• Tablets need no fridge but must stay in the original bottle.

When something has gone wrong with a pen, the fastest reliable answer is the pharmacist or the manufacturer’s line on the carton. They have a script for this. Guessing is the only genuinely bad option.

Sources

1. Novo Nordisk. OZEMPIC (semaglutide) injection — US Prescribing Information, Medication Guide and Instructions for Use, June 2026. https://www.novo-pi.com/ozempic.pdf
2. Novo Nordisk. WEGOVY (semaglutide) injection and WEGOVY (semaglutide) tablets — US Prescribing Information, Medication Guide and Instructions for Use, June 2026. https://www.novo-pi.com/wegovy.pdf
3. Eli Lilly and Company. ZEPBOUND (tirzepatide) injection — US Prescribing Information and Instructions for Use for the single-dose pen, single-dose vial, multi-dose vial and KwikPen. https://uspl.lilly.com/zepbound/zepbound.html
4. US Food and Drug Administration / Eli Lilly and Company. FOUNDAYO (orforglipron) tablets — US Prescribing Information, April 2026. https://www.accessdata.fda.gov/drugsatfda_docs/label/2026/220934Orig1s000lbl.pdf
5. US Food and Drug Administration / Novo Nordisk. SAXENDA (liraglutide) injection — US Prescribing Information. https://www.accessdata.fda.gov/drugsatfda_docs/label/2023/206321s016lbl.pdf
6. Transportation Security Administration. What Can I Bring? Complete List (Alphabetical). https://www.tsa.gov/travel/security-screening/whatcanibring/all-list