Quick Answer: US Storage Rules by Product and Device
Ozempic (semaglutide) multidose injection pens need refrigeration before first use. After first use, they can be kept for 56 days either refrigerated at 36°F–46°F (2°C–8°C) or at 59°F–86°F (15°C–30°C). That is not a storage rule for every medication or every device sold under the same brand.[3]
This guide covers the US presentations listed in the table, using manufacturer prescribing information checked September 13, 2026. It also covers Wegovy (semaglutide) single-dose pens, Mounjaro (tirzepatide), Zepbound (tirzepatide), Saxenda (liraglutide) pens, and Rybelsus (semaglutide) tablets. It is not a complete list of GLP-1 products. Ozempic syringes or tablets and Wegovy FlexTouch pens, syringes, or tablets are outside this table's scope; do not apply the pen rows to those presentations.[3][4]
Check the country, product name, device, and instructions on your own carton. Do not apply these rules to imported or compounded medicines. For compounded medication, ask the dispensing pharmacy for the formulation's storage instructions and beyond-use date; this brand-label table does not establish them.
The table summarizes storage labeling, not a dosing plan. Your prescriber determines your dose; do not change it because of a storage problem. Follow the package expiration date and any earlier applicable discard deadline.
| US product and presentation | Unopened / before first use | Once used or opened | Source |
|---|---|---|---|
| Ozempic multidose injection pen | Refrigerate at 36°F–46°F (2°C–8°C). Do not treat the 56-day in-use allowance as routine unopened storage. | Discard 56 days after first use, whether stored refrigerated at 36°F–46°F (2°C–8°C) or at 59°F–86°F (15°C–30°C). | [3] |
| Wegovy single-dose pen | Refrigerate at 36°F–46°F (2°C–8°C). If needed, before cap removal, keep in the original carton at 46°F–86°F (8°C–30°C) for up to 28 days. | Single use only; discard after use. The 28-day allowance is before use, not after cap removal. | [4] |
| Mounjaro single-dose pen or single-dose vial | Refrigerate at 36°F–46°F (2°C–8°C); if needed, up to 21 total days unrefrigerated at no more than 86°F (30°C). Discard after that total. | Single use only; discard after use, including any medicine remaining in the vial. | [1] |
| Mounjaro multidose vial or single-patient-use KwikPen | Refrigerate at 36°F–46°F (2°C–8°C) until expiration; if stored at room temperature up to 86°F (30°C), discard after 30 days. | Refrigerate at 36°F–46°F (2°C–8°C) or store at room temperature up to 86°F (30°C). Discard at the earliest of 30 total days at room temperature, 30 days after first use, or after 4 weekly doses. | [1] |
| Zepbound single-dose pen or single-dose vial | Refrigerate at 36°F–46°F (2°C–8°C); if needed, up to 21 total days unrefrigerated at no more than 86°F (30°C). Discard after that total. | Single use only; discard after use, including any medicine remaining in the vial. | [2] |
| Zepbound multidose vial or single-patient-use KwikPen | Refrigerate at 36°F–46°F (2°C–8°C) until expiration; if stored at room temperature up to 86°F (30°C), discard after 30 days. | Refrigerate at 36°F–46°F (2°C–8°C) or store at room temperature up to 86°F (30°C). Discard at the earliest of 30 total days at room temperature, 30 days after first use, or after 4 weekly doses. | [2] |
| Saxenda multidose pen | Refrigerate at 36°F–46°F (2°C–8°C). | Discard 30 days after first use, whether stored refrigerated at 36°F–46°F (2°C–8°C) or at 59°F–86°F (15°C–30°C). | [5] |
| Rybelsus tablets | Store at 68°F–77°F (20°C–25°C); permitted excursions to 59°F–86°F (15°C–30°C). Keep in the original bottle, dry and protected from moisture. | Keep tablets in the original closed bottle until ready to take one; do not transfer to another container. Follow the expiration date. There is no injectable-pen first-use clock. | [6] |
Do not freeze the injectable products in this table, and do not use them if they have frozen. Their labels also require protection from heat and light; keep the applicable carton or pen cap in place as directed.[1][3][5]
How Long Can Mounjaro Be Unrefrigerated?
Mounjaro Storage — Quick Answer
For US single-dose pens and single-dose vials: up to 21 total days at no more than 86°F (30°C), before use. The limit does not start at first injection. These containers are used once and then discarded; they are not stored for repeat doses.[1]
For US multidose vials and KwikPens: use the separate 30-day rules. An unopened container kept at room temperature must be discarded after 30 days. After opening, discard at the earliest of 30 total days at room temperature, 30 days after first use, or after 4 weekly doses, even if medicine remains. Refrigerated storage is allowed after opening, but it does not erase an existing time limit.[1]
Record both the time spent out of refrigeration and the first-use date when applicable. Time at room temperature before opening counts toward a total room-temperature limit. Do not start a fresh allowance each time a container is put back into the refrigerator.[1]
Mounjaro vs Ozempic Storage Rules
The useful comparison is device against device, not just brand against brand. Ozempic's multidose injection pen has a 56-day after-first-use limit. Mounjaro's single-dose pen or vial has a 21-total-day unrefrigerated allowance before use. Mounjaro's multidose vial and KwikPen instead have the 30-day and 4-weekly-dose discard limits described above.[1][3]
If you switch products or receive a different presentation at a refill, ask the pharmacist to show you the matching storage and Instructions for Use sections. Do not carry over the previous device's dates or handling assumptions.
For background on the medicines, see the Tirzepatide Guide: Mounjaro & Zepbound and Mounjaro vs Zepbound.
What If Mounjaro Was Left in a Hot Car?
There is no label-based rule that a certain number of minutes in a hot car is safe. The relevant limit is the medication's actual temperature and exposure time, not just the outdoor temperature. Mounjaro's room-temperature allowance does not cover temperatures above 86°F (30°C).[1]
Set the medication aside and call the pharmacist or manufacturer before using it if overheating is possible or the history is unknown. Give them the device type, how long it was left there, any measured temperatures, and whether it had already been opened. Cooling it again is not proof that it is usable.
Mounjaro solution should be clear and colorless to slightly yellow; the label says not to use it if particles or discoloration are seen. Normal appearance does not establish that an uncertain temperature exposure was acceptable.[1]
When to Call the Pharmacist About Mounjaro Storage
Ask before using it if you cannot identify the presentation, cannot reconstruct its room-temperature history, suspect freezing or overheating, or see an appearance change. If a discard limit has already been reached, follow the label rather than extending it yourself.[1]
Keep the carton, lot number, expiration date, and pharmacy details available. Ask about replacement options and what to do if your next scheduled dose is affected. Do not take extra medication to compensate for a suspected storage problem.
Storage by Brand: Details Beyond the Table
Ozempic Multidose Injection Pens
Before first use, the US label calls for refrigeration at 36°F–46°F (2°C–8°C), away from the cooling element, and the original carton until administration. After first use, write down the date and discard the pen after 56 days even if medicine remains. Store it without an injection needle attached and keep the pen cap on between uses.[3]
If an unused pen was accidentally left out or a refrigerator failed, ask the pharmacist or manufacturer about that specific exposure. Do not assume that being below 86°F automatically makes every unopened pen acceptable for 56 days. The table's 56-day rule is the label's after-first-use rule.[3]
Wegovy Single-Dose Pens
The 28-day allowance applies outside the refrigerator, in the original carton, before cap removal, at 46°F–86°F (8°C–30°C). Keep the cap on until ready to inject; discard after use. Cap removal does not start a fresh 28 days.[4]
The single-dose pen instructions say to throw it away if it has frozen, been exposed to light or temperatures above 86°F (30°C), or been out of the refrigerator for 28 days or longer. Follow those explicit discard instructions. This section is not the storage guide for Wegovy FlexTouch or other Wegovy presentations.[4]
Zepbound Pens and Vials
Zepbound's US prescribing information was checked separately from Mounjaro's. The current label specifies 21 total unrefrigerated days for single-dose pens and vials and separate 30-day limits for multidose vials and KwikPens. The opened multidose product must also be discarded after 4 weekly doses if that comes first. Keep it in the original carton to protect it from light.[2]
Do not assume every Zepbound device is single-dose or apply a multidose after-opening allowance to a single-dose vial. Read the presentation printed on the package.[2]
Saxenda Multidose Pens
Refrigerate new, unused pens. After first use, a pen may be kept refrigerated at 36°F–46°F (2°C–8°C) or at 59°F–86°F (15°C–30°C), but it must be discarded after 30 days. Keep its cap on, protect it from excessive heat and sunlight, and remove the injection needle before storage.[5]
Rybelsus Tablets
US Rybelsus tablets belong in their original bottle, not a blister pack or a pill organizer. Store the closed bottle in a dry place away from moisture at 68°F–77°F (20°C–25°C). The prescribing information permits excursions to 59°F–86°F (15°C–30°C); that does not make the full excursion range the routine storage target.[6]
Rybelsus does not use the refrigerated storage instructions for injection pens. This guide does not claim it is the only oral GLP-1 medicine or that all medicines in this treatment category have identical stability requirements.
Travel Storage Guide
Plan storage around the exact presentation and remaining allowance, including time outside refrigeration before the trip. A short trip does not automatically require ice packs if the product's label permits the planned temperature and duration. Conversely, an insulated bag alone does not demonstrate that medication stayed within its required range.
Flying with GLP-1 Medications
- Keep medication accessible in your carry-on rather than placing it in checked baggage, where you cannot monitor or retrieve it during the trip.
- Retain the original packaging and pharmacy label. Pack the matching instructions and a record of relevant storage dates.
- Check current TSA screening guidance, airline requirements, and destination rules before departure, especially for needles, liquids, and medically necessary cooling supplies. Do not assume a retailer's “TSA-approved” description certifies a cooler or its temperature performance.
- If refrigeration is needed, select a setup that can maintain the labeled temperature and monitor it with a thermometer. Separate medication from frozen packs to reduce freezing risk; a cloth barrier alone is not a temperature guarantee.
See Traveling with GLP-1 Meds and International Travel with GLP-1 Medications for additional planning topics. Verify current rules for your itinerary rather than relying only on an older travel checklist.
Road Trips
Bring medication inside when you park. Avoid the glove compartment, trunk, and direct sunlight. Check conditions around the medication rather than assuming an air-conditioned car or a cooler keeps it within range. If you suspect excessive heat, follow the pharmacist-contact advice above instead of using a minutes-in-the-car cutoff.
Hotel Stays
Check a refrigerator with a thermometer before using it for medication. A unit that feels cool is not enough: the injectable products covered here require 36°F–46°F (2°C–8°C) for refrigerated storage, and must not freeze.[1][3][5]
Keep medication away from cooling plates or freezer compartments. If the refrigerator cannot maintain the required range, ask the hotel about another monitored storage option, or check with your pharmacist whether your product's room-temperature allowance covers the stay. A hotel safe is not a refrigerator and does not provide temperature-controlled storage.
Power Outage Protocol
Do not use food-storage estimates, the duration of the outage alone, or a normal-looking solution as proof that a medicine is usable. Decisions depend on the actual temperature history, exact product and device, prior room-temperature time, and whether it has been used.
- Keep the refrigerator door closed as much as possible. Record when power failed and any thermometer readings. A minimum/maximum thermometer or temperature logger can provide more information than a single reading after power returns.
- Check the matching label row. A single-dose product's permitted unrefrigerated period is different from an opened multidose pen's first-use deadline. Record additional time outside the labeled refrigerated range; do not reset existing deadlines.
- Arrange monitored storage if needed. A cooler can be an option only if it maintains the required temperature without freezing the medicine. Keep frozen packs separated from medication and check the temperature near it.
- Assess before using. If the history is unknown, a limit was exceeded, or freezing is possible, contact the dispensing pharmacist or manufacturer. A cold refrigerator after power returns cannot establish how warm or cold the medicine became earlier.
Do not move injectable medication into a freezer. The labels for the injectable products covered here say not to use them if frozen.[1][3][5]
Mail-Order Delivery and Heat Exposure
Arrange to bring deliveries indoors promptly. Ask the pharmacy what to check on arrival and how to report a delayed or warm shipment. Save the shipping carton, packing materials, delivery time, and any temperature indicator readings.
Melted ice packs alone do not establish the medication's temperature history; neither does a cold pack guarantee that the medicine never froze or overheated. If a shipment is concerning, contact the dispensing pharmacy before using it. Ask it to assess the shipping conditions and product-specific limits rather than deciding from appearance alone.
When to Call the Pharmacist or Manufacturer
Contact the dispensing pharmacy or the manufacturer using the number on your package when:
- The actual storage temperature or time is unknown, or a label limit may have been exceeded.
- Medication may have frozen, been left in a hot car, or arrived under questionable shipping conditions.
- The liquid has particles or a change in appearance, or a device is damaged.
- The presentation on a refill differs from the one you used previously.
- You cannot determine the applicable expiration, first-use, or total room-temperature deadline.
Give them the brand, generic name, country, strength, device type, lot number, expiration date, first-use date if applicable, and exposure history. Do not assume all injections must be colorless: Mounjaro and Zepbound are described as clear and colorless to slightly yellow.[1][2]
Do not use medication that the label says to discard. For uncertain exposures, get product-specific advice before using it. Your prescriber or pharmacist can also advise on an affected scheduled dose; do not increase or repeat a dose to compensate for suspected loss of potency.
Storage Records and Supplies
Record the right event, not simply the pharmacy pickup date:
- Ozempic multidose pen and Saxenda pen: first-use date and the corresponding in-use discard date.[3][5]
- Wegovy single-dose pen: time out of refrigeration before cap removal, not an after-use date.[4]
- Mounjaro and Zepbound single-dose devices: total unrefrigerated time before use.[1][2]
- Mounjaro and Zepbound multidose vials or KwikPens: total room-temperature time, first-use date, and the 4-weekly-dose discard limit.[1][2]
Keep records without obscuring the medication label, expiration date, dose display, or viewing window. Store all medication out of children's reach and follow the device leaflet for disposal.
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- Refrigerator thermometer — Compare options for monitoring the temperature where your medication is stored. A single reading does not reconstruct an earlier exposure.
- Tooktake medication reminder labels — An optional way to record dates; a written log or phone reminder can serve the same purpose.
Storage accessories do not extend manufacturer discard limits. For packing considerations, see Best Travel Cases & Coolers for GLP-1 Pens; check the exact product's specifications rather than assuming it guarantees a medication-safe temperature.
Sources
Manufacturer US prescribing information and accompanying patient instructions checked September 13, 2026. These references support the presentation-specific rules above; the guide does not claim newly published stability research.
[1] Eli Lilly, Mounjaro US Prescribing Information, revised August 2026, section 16.2 and Instructions for Use: single-dose pen/vial versus multidose vial/single-patient-use KwikPen.
[2] Eli Lilly, Zepbound US Prescribing Information, revised August 2026, section 16.2 and Instructions for Use: single-dose pen/vial versus multidose vial/single-patient-use KwikPen.
[3] Novo Nordisk, Ozempic injection US Prescribing Information, revised May 2026, section 16, Recommended Storage Conditions, and pen Instructions for Use. This guide's row is for the multidose injection pen.
[4] Novo Nordisk, Wegovy US Prescribing Information, revised June 2026, section 16, Recommended Storage, and single-dose pen Instructions for Use. This guide's row is for the single-dose pen.
[5] Novo Nordisk, Saxenda US Prescribing Information, revised February 2026, section 16, Recommended Storage, and pen Instructions for Use.
[6] Novo Nordisk, Rybelsus and Ozempic tablets US Prescribing Information, revised January 2026, section 16, Storage and Handling, and Medication Guide. This guide's row is for Rybelsus tablets.