Does Ozempic Need to Be Refrigerated? How Long It Lasts Out of the Fridge
Yes, until you start the pen. An unused Ozempic pen is a refrigerator item. Once you have used it for the first time, the label lets the pen live in the fridge or at room temperature for up to 56 days, and that is the number most people searching this are really after. This page gives the label figures, what they do and do not allow, what to do on a flight, and where compounded semaglutide differs.
The short answer
Unused pen: refrigerate at 36 to 46 F (2 to 8 C), in the carton, until the expiration date. Pen in use: 56 days at 59 to 86 F (15 to 30 C) or in the fridge, cap on, away from heat and sunlight, then throw it away even if some is left. Prefilled syringe: fridge, or up to 28 days at 46 to 86 F if needed. Never frozen. Compounded semaglutide has no label allowance: follow the pharmacy.
The label figures, side by side
These are the storage statements from the US prescribing information and the patient Instructions for Use for Ozempic (Novo Nordisk, DailyMed label published 10 June 2026). Check the leaflet in your own box, because labels are updated.
| Form | Before first use | Once started, or out of the fridge | Never |
|---|---|---|---|
| Ozempic pen (several weekly doses) | Refrigerate, 36 to 46 F, in the carton, until the expiration date | After first use: 56 days at 59 to 86 F or in the fridge. Throw away after 56 days | Freeze it, or use it after it has frozen. Leave it in heat or direct sun |
| Ozempic prefilled syringe (single dose) | Refrigerate, 36 to 46 F, in the carton | If needed, 46 to 86 F for up to 28 days. Note the date it came out | Freeze. Warm it with hot water or a microwave |
| Compounded semaglutide vial | Refrigerate; follow the pharmacy label | No label allowance. Ask the pharmacy | Freeze. Use past the beyond-use date |
| Research vial, reconstituted | Refrigerate, use within 2 to 4 weeks | Not a storage option. Hours for an injection, not days | Freeze or leave in light |
The part people miss: the 56 days starts at first use
Search results often say Ozempic "can be kept at room temperature for 56 days". That is true of a pen in use. The label's wording for an unused pen is refrigerator only, until the expiration date, with no room temperature allowance written for it. So a spare pen in the glove box or a bag on a hot day is not covered by the 56 days, and the label does not hand you a number for it either.
If an unused pen has been somewhere warm, do not guess. The patient instructions print Novo Nordisk's line, 1-888-693-6742, and a pharmacist can tell you the same day. The label does give the rules that matter in daily use: cap on when not in use, protect from excessive heat and sunlight, store without a needle attached, and never next to the refrigerator's cooling element.
What counts as too hot
86 F (30 C) is the top of the in-use range on the label. A parked car in summer passes it in minutes, and a window ledge in sun does too. A kitchen counter in a normal home does not come close. The label does not say what to do with a pen that has been hotter than 86 F, which is exactly why that case belongs with the pharmacist or the manufacturer rather than with a forum thread.
One more label line worth knowing for the prefilled syringe: do not warm it with a heat source such as hot water or a microwave. It does not need warming.
Flying with an Ozempic pen
Keep the pen in your carry-on so you control where it sits. The label forbids freezing and warns against heat, and you cannot see either happening in a checked bag. At the checkpoint the rule is TSA's rule for medically necessary liquids.
TSA's own wording, from its Disabilities and Medical Conditions page (read 7 October 2026):
- "TSA allows larger amounts of medically necessary liquids, gels, and aerosols in reasonable quantities for your flight, but you must declare them to TSA officers at the checkpoint for inspection."
- "Before the screening begins, inform the TSA officer that you have medically necessary liquids and/or medications. Place them in a bin or bowl separate from other property, along with accessories associated with your liquid medication such as freezer packs, IV bags, pumps and syringes."
- "Ice packs, freezer packs, gel packs and other accessories may be presented at the screening checkpoint in a frozen, partially frozen or melted state to keep medically necessary items cool."
The rule is written for medically necessary liquids in general and does not name a drug. TSA adds that a medically necessary liquid which alarms gets additional screening, and if the alarm cannot be resolved the item may not be allowed, so leave yourself time. Rules change; check tsa.gov before you fly. Outside the US, medicines are handled under each airport's own rules; EU airports exempt medicines from the 100 ml limit under Regulation 2015/1998, and the storage case guide has that text.
Where a cooler earns its place
For a weekend with a pen already in use you may not need a cooler at all: 56 days at up to 86 F covers it. A cooler matters when an unstarted pen has to stay at 36 to 46 F for longer: a road trip, a week somewhere hot, a hotel room with no fridge, or a spare pen you would rather not leave in a bag. The peptide fridge guide compares what each type of cooler actually holds.
Of the small battery units, the VialHaus Cold is a thermoelectric box with a 13,600 mAh battery (10 to 20 hours rated) that holds 36 to 46 F in rooms up to about 75 F and runs warmer in a hot car or a room above about 80 F. It is built around vials: the tray takes 28 upright, and pens lie flat in a side bay with an inside size of 7.3 x 4.1 x 1.6 in, so measure your pen before you order. It costs 299 dollars, ships from a US warehouse in 3 to 8 days, and is a storage and travel box, not a medical device (disclosure: same founder as the Bureau).
Compounded and research semaglutide
A compounded vial from a 503A or 503B pharmacy has no manufacturer stability study behind it, so the 56 days is not a rule for it. Its storage terms are the pharmacy's label and beyond-use date; ask what room temperature time is allowed and write it down. More in compounded semaglutide. Research-grade powder follows the peptide storage guide: tolerant as a powder, a two to four week fridge item once mixed.
Signs a pen should be discarded
- It has been frozen, even once.
- It has been in use for 56 days, even with medicine left. Write the disposal date on the calendar when you start it, as the instructions suggest.
- The medicine is cloudy or has particles in it. The label describes it as clear and colorless, and says not to use the pen if it looks cloudy or contains particles.
- It is past the expiration date on the label.
For a pen that has been somewhere hot, the label has no printed answer. Ask the pharmacist.
Related reading
Does Wegovy need to be refrigerated: the same drug in the Wegovy label. Does Zepbound need to be refrigerated and Mounjaro: the tirzepatide figures. Semaglutide dosage guide. Storage and travel cases.
Frequently asked questions
Does Ozempic need to be refrigerated?
Yes, until you start the pen. An unused pen goes in the refrigerator at 36 to 46 F (2 to 8 C) in the original carton. After first use the label allows the pen to be kept in the fridge or at 59 to 86 F (15 to 30 C), for up to 56 days. Never freeze it.
How long can Ozempic be out of the fridge?
A pen in use can live at room temperature, 59 to 86 F, for up to 56 days. The label gives no out-of-fridge allowance for a pen that has not been started. The single-dose prefilled syringe can be kept at 46 to 86 F for up to 28 days if needed.
How long does an Ozempic pen last after first use?
56 days at 59 to 86 F or in the refrigerator. The label says to throw the pen away after 56 days even if it still has medicine in it.
Can I take Ozempic on a plane?
Yes. TSA allows medically necessary liquids in reasonable quantities above the usual 3.4 oz limit, but you must declare them at the checkpoint and place them in a separate bin. Ice packs and gel packs may be presented frozen, partially frozen or melted.
What if an Ozempic pen has been frozen?
Do not use it. The label says not to use Ozempic that has been frozen. The label also says not to store it directly next to the refrigerator's cooling element, which is where a fridge is coldest.
Does compounded semaglutide need to be refrigerated?
Yes by default, and the branded 56 days does not apply to it. A compounded vial follows its pharmacy's label and beyond-use date, which is usually shorter. If the label is silent, ask the pharmacy.
Sources
- Ozempic prescribing information, section 16.2, and Instructions for Use, Novo Nordisk, DailyMed label published 10 June 2026.
- TSA, Disabilities and Medical Conditions, and What Can I Bring: Medical, read 7 October 2026.
Storage figures from the US Ozempic label as of October 2026. Labels change; the leaflet in your box wins. Educational content, not medical advice.