Does Semaglutide Need to Be Refrigerated?

Medically reviewed by Amber Patel, MD · Last updated July 15, 2026. Nouri content is reviewed by licensed clinicians and updated as guidance changes.

Does semaglutide need to be refrigerated?

Yes. Semaglutide is a peptide, and peptides are fragile — heat and freezing both break them down in ways you can't see and can't undo. Every FDA-approved semaglutide product carries the same core rule: store it refrigerated at 2–8°C (36–46°F) until you're ready to use it, keep it in its original carton to protect it from light, and never freeze it. That applies to Ozempic and to Wegovy (including the newer 7.2 mg pen). A practical note the labels make explicitly: don't store it against the back wall of the fridge where things freeze, and don't use the door, where the temperature swings every time you open it.

The one exception is oral semaglutide (Rybelsus tablets, and the Wegovy tablet): those are stored at room temperature, 20–25°C (68–77°F), kept dry in their original packaging — not refrigerated. Everything below is about the injectable forms.

GLP-1 storage at a glance

Here's every common GLP-1, with the temperature it needs and the room-temperature window it tolerates once it leaves the fridge:

Product	Before first use	Room-temperature window	Freeze?
Ozempic (multi-dose pen)	Fridge, 2–8°C	Up to 56 days at ≤30°C (86°F) — the in-use limit	Never
Ozempic (single-dose syringe)	Fridge, 2–8°C	Up to 28 days at 8–30°C	Never
Wegovy pen (incl. 7.2 mg)	Fridge, 2–8°C	Up to 28 days at 8–30°C, then discard after use	Never
Zepbound / Mounjaro (tirzepatide)	Fridge, 2–8°C	Up to 21 days total at ≤30°C (don't return to fridge)	Never
Compounded semaglutide or tirzepatide (vial)	Fridge, 2–8°C — refrigerate throughout	Follow the beyond-use date on your pharmacy label	Never
Oral semaglutide (Rybelsus / Wegovy tablet)	Room temp, 20–25°C — not refrigerated	Keep dry, in original packaging	—

How long can semaglutide be out of the fridge?

It depends on the product, and the windows are not interchangeable. For Ozempic, the multi-dose pen can be kept up to 56 days once you start using it — either at room temperature (15–30°C) or back in the fridge — and then it's discarded whether or not it's empty. The newer Ozempic single-dose prefilled syringe is a tighter 28 days at room temperature. Wegovy pens tolerate up to 28 days at up to 30°C before use. These are the manufacturers' tested limits, not estimates — past them, the drug isn't guaranteed to work, so the label says discard.

The mistake worth avoiding: treating "does ozempic need to be refrigerated" as a yes/no when the real answer is "yes before use, and then you have a countdown." Note the day you first take it out, and don't rely on memory for a 56-day window.

Does tirzepatide need to be refrigerated?

Yes — Zepbound and Mounjaro follow the same 2–8°C refrigeration rule as semaglutide, with one meaningfully shorter room-temperature allowance: each single-dose pen or vial can sit unrefrigerated at up to 30°C (86°F) for up to 21 days total, and once it's out, the label's guidance is not to move it back into the fridge. Like every GLP-1, it must never be frozen and should be protected from heat and light in its original carton. If you're mapping out a titration schedule alongside storage, our tirzepatide dosing chart covers the dose side of the same routine.

Does compounded semaglutide need to be refrigerated?

Yes — and this is where compounded medication genuinely differs from a brand pen, so it's worth getting right. Compounded semaglutide and tirzepatide are usually dispensed as multi-dose vials, and the storage rule that governs them isn't a manufacturer's package insert — it's the beyond-use date (BUD) your compounding pharmacy prints on the label. That date is assigned under United States Pharmacopeia standards (USP <797>) based on how the preparation was made and how it's stored, and it is the authority for your specific vial.

In practice, compounded vials are meant to stay refrigerated at 2–8°C throughout — they generally don't carry the multi-week room-temperature allowance that a brand pen does, so the safest habit is to keep the vial in the fridge and only have it out for the minute it takes to draw and inject. Once the vial is first punctured, an in-use countdown begins, and the beyond-use date on the label already accounts for it. Give the solution a look before each dose, too: it should be clear and colorless to slightly yellow, and anything cloudy, discolored, or with particles gets discarded. Because compounded vials use a U-100 insulin syringe rather than a fixed-dose pen, drawing the right amount matters as much as storing it right — our semaglutide dose calculator converts your prescribed dose to units for your vial's concentration.

How long is compounded semaglutide good for once opened?

There's no single universal number — that's the honest answer, and any page that gives you one flat figure is guessing. A compounded vial's shelf life is set by the pharmacy and constrained by USP <797>, which caps beyond-use dates by storage temperature (refrigeration allows a longer date than room temperature because cold slows microbial growth). Real-world BUDs for compounded GLP-1 vials commonly land somewhere in the range of about a month to a few months refrigerated, but your label's date is the only one that counts. If the printed date has passed, don't use it — reorder. Compounded semaglutide is not FDA-approved and has not been evaluated by the FDA for quality; that makes following the pharmacy's dating and handling instructions more important, not less.

Can you use semaglutide that was left out overnight?

Sometimes — it depends entirely on the product and how long and how warm. If a brand pen stayed within its labeled window (an Ozempic pen inside its 56 days, a Wegovy pen inside its 28 days, tirzepatide inside its 21 days) and didn't exceed 30°C/86°F, the label treats it as still usable — a single night on the counter in a normal room is typically inside those allowances. What you can't undo is heat: semaglutide and tirzepatide are proteins, and once they've been degraded by high temperature or by exceeding the room-temperature window, chilling them again doesn't restore them. So if it was left somewhere hot, left out well beyond the window, or you're not sure how long, the safe move is to discard it.

For compounded vials the tolerance is narrower and formulation-specific, so the consistent instruction is simpler: call your compounding pharmacy, tell them roughly how warm and how long, and let them tell you to use it or replace it. Most will err toward replacing it, and a legitimate pharmacy will take that call — one more reason to use a provider that names the pharmacy behind your prescription.

What happens if a GLP-1 freezes?

Don't use it. This is the one storage rule with no gray area: every semaglutide and tirzepatide label states plainly that if the medication has been frozen, it must be discarded — even after it thaws and looks normal. Freezing damages the peptide structurally, and there's no way to verify from the outside whether a thawed dose still works. If your fridge runs cold or the pen drifted against the back wall and froze, replace it rather than risk an ineffective dose.

Storing your GLP-1 while traveling

Short trips are manageable: an insulated bag with a cold pack (not directly touching the medication, which could freeze it) keeps a vial or pen in range, and the room-temperature windows above buy you flexibility for a day out. Air travel, hotel mini-fridges, and international customs each add wrinkles worth planning for — our guide to traveling with GLP-1 medication covers TSA rules, keeping cold on a long flight, and crossing borders with injectables.

How storage works with a Nouri prescription

Everything above is the reference; your vial's label is the specific instruction. Nouri's compounded semaglutide and tirzepatide are prepared by state-licensed 503A compounding pharmacies and ship with the beyond-use date and storage guidance on the label — refrigerate on arrival, keep it out only to dose, and message your Care Team if a shipment sits out too long or a storage question comes up. If you're still choosing a provider, our walkthrough of getting semaglutide online covers what to expect from intake to delivery.

Frequently asked questions

Does Ozempic need to be refrigerated?

Yes — store Ozempic in the refrigerator at 2–8°C (36–46°F) before first use, protected from light, and never freeze it. After first use, the multi-dose pen can be kept up to 56 days at room temperature (up to 30°C) or in the fridge; the single-dose syringe lasts 28 days at room temperature.

How long can semaglutide be left out of the fridge?

For an in-use Ozempic pen, up to 56 days at room temperature (≤30°C); for a Wegovy pen, up to 28 days before use. Past those windows, or above 86°F, discard it. Compounded semaglutide should stay refrigerated — follow the beyond-use date on your pharmacy label.

Does compounded semaglutide need to be refrigerated?

Yes. Compounded semaglutide is dispensed as a multi-dose vial that should be kept refrigerated at 2–8°C throughout, out only briefly to draw each dose. The pharmacy's beyond-use date on the label is the authority for how long it lasts.

How long is compounded semaglutide good for once opened?

It varies by pharmacy and formulation — there's no universal number. The beyond-use date printed on your vial, assigned under USP <797> standards, is the definitive shelf life. If that date has passed, replace the vial rather than use it.

Can you use semaglutide that was left out overnight?

If a brand pen stayed within its labeled room-temperature window and below 30°C/86°F, it's typically still usable. If it was left somewhere hot, well past the window, or you're unsure, discard it — heat damage to the peptide isn't reversed by re-refrigerating. For compounded vials, call your pharmacy.

What happens if my GLP-1 freezes?

Discard it. Every semaglutide and tirzepatide label says a product that has been frozen must not be used, even after it thaws and looks normal — freezing damages the peptide in ways you can't see.

Does tirzepatide need to be refrigerated?

Yes — Zepbound and Mounjaro are stored at 2–8°C before use and can be kept unrefrigerated at up to 30°C for a total of 21 days, after which they're discarded. Never freeze them. Compounded tirzepatide follows its pharmacy label's beyond-use date.

Sources

• Ozempic (semaglutide) Prescribing Information, Storage — DailyMed. dailymed.nlm.nih.gov
• Wegovy (semaglutide) Prescribing Information, Storage — DailyMed. dailymed.nlm.nih.gov
• Zepbound (tirzepatide) Prescribing Information, Storage — DailyMed. dailymed.nlm.nih.gov
• Mounjaro (tirzepatide) Prescribing Information — DailyMed. dailymed.nlm.nih.gov
• Rybelsus (oral semaglutide) Prescribing Information — DailyMed. dailymed.nlm.nih.gov
• USP Compounding — Beyond-Use Dating fact sheet (USP <797>). usp.org
• FDA — FDA's Concerns with Unapproved GLP-1 Drugs Used for Weight Loss. fda.gov

Considering treatment? See if you qualify with Nouri — a five-minute health intake, reviewed by a U.S.-licensed physician. Medication ships from a named, state-licensed pharmacy with storage guidance on every label.

Compounded semaglutide and tirzepatide are not FDA-approved and have not been evaluated by the FDA for safety, effectiveness, or quality, and are not therapeutically equivalent to Ozempic, Wegovy, Zepbound, or Mounjaro. The storage information above describes FDA-approved product labels and general USP standards; it is educational, not medical advice, and never a substitute for the instructions on your own pharmacy label or your prescriber's guidance. Nouri connects patients with licensed, independent physicians who make all prescribing decisions.