Key Takeaways
- Yes, semaglutide expires. Both brand-name and compounded forms have a defined shelf life.
- Unopened brand-name semaglutide (Ozempic, Wegovy) is good 18 to 24 months refrigerated, until the printed expiration date.
- Once a pen or vial is in use, it's good 28 to 56 days depending on the product. Discard after that even if drug remains.
- Compounded semaglutide is typically dated 28 to 90 days by the compounding pharmacy.
- Frozen, cloudy, or visibly damaged semaglutide should be discarded regardless of expiration date.
Direct answer (40-60 words, snippet-optimized)
Yes, semaglutide expires. Unopened brand-name pens (Ozempic, Wegovy) carry an 18 to 24-month expiration date when stored refrigerated at 36 to 46 F. Once in use, Ozempic pens are good for 56 days at room temperature; Wegovy pens for 28 days. Compounded semaglutide is typically dated 28 to 90 days from the compounding pharmacy.
Table of contents
- The 30-second answer
- Brand-name semaglutide expiration dates
- Compounded semaglutide expiration dates
- What "in use" means and the second clock
- Why semaglutide expires (the chemistry)
- How to read the expiration date on the package
- Storage rules that affect shelf life
- What happens if you use expired semaglutide
- How to dispose of expired semaglutide
- Travel and the cold chain
- FAQ
- Footer disclaimers
Brand-name semaglutide expiration dates
Both Ozempic and Wegovy are pre-filled pens manufactured by Novo Nordisk. Both carry a printed expiration date on the carton and on the pen body. The full shelf life is conditional on refrigerated storage at 36 to 46 F (2 to 8 C).
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Try the BMI Calculator →| Product | Unopened, refrigerated | Once in use | Maximum room temperature exposure (cumulative) |
|---|---|---|---|
| Ozempic 0.25/0.5 mg pen | Until printed date (typically 24 months from manufacture) | 56 days | 86 F (30 C) for the in-use period |
| Ozempic 1 mg pen | Until printed date | 56 days | 86 F (30 C) for the in-use period |
| Ozempic 2 mg pen | Until printed date | 56 days | 86 F (30 C) for the in-use period |
| Wegovy pen (all doses) | Until printed date | 28 days | 86 F (30 C) for the in-use period |
| Rybelsus (oral) | Until printed date | Tablet bottles must be used by printed date | Room temperature, 59 to 86 F |
The "in use" date starts the first time the pen is used. Most patients write the start date on the pen or on a calendar. Once the in-use period passes, discard the pen even if drug remains.
Compounded semaglutide expiration dates
Compounded semaglutide comes from a state-licensed compounding pharmacy that prepares the drug in response to an individual prescription. The pharmacy assigns a beyond-use date (BUD) based on USP Chapter 797 sterility limits and the formulation's stability data.
Typical BUDs for compounded semaglutide:
- Multi-dose vial, refrigerated, no preservative: 14 to 30 days
- Multi-dose vial, refrigerated, with preservative (benzyl alcohol or phenol): 28 to 90 days
- Single-dose vial: Use within 24 hours of opening
The exact date is printed on the vial label by the dispensing pharmacy. Always go by the label. Some pharmacies date conservatively to account for shipping time and patient handling. Others use the maximum allowable BUD under USP rules.
A compounded semaglutide vial is typically dispensed in a 30-day supply. By the time you get to the last weekly dose of a 4-week vial, you should be near the BUD but not past it. If you're past it, discard the vial and ask the pharmacy for replacement guidance.
What "in use" means and the second clock
Patients often miss this. Semaglutide has two expiration dates running at the same time:
- Manufacturer expiration date (or pharmacy beyond-use date for compounded). The hard limit on the unopened product.
- In-use date. A separate clock that starts when the pen or vial is first used.
Whichever clock runs out first wins. If you open a pen on day 1 of the in-use period and the manufacturer expiration is 60 days away, your hard limit is 56 days (Ozempic) or 28 days (Wegovy), whichever comes first.
If the manufacturer date passes while the pen is in use, you discard at the manufacturer date. The 28- or 56-day window doesn't extend past the printed expiration.
This is why writing the open date on the pen matters. A pen opened on March 1 with a "discard after 28 days" rule can't be used on March 30. The drug may still appear normal, but stability and sterility past the in-use window are no longer guaranteed.
Why semaglutide expires (the chemistry)
Semaglutide is a peptide drug, a 31-amino-acid chain with a fatty acid sidechain. Peptides degrade through several pathways over time:
- Hydrolysis. Water in the formulation slowly cleaves peptide bonds.
- Oxidation. Oxygen affects amino acids like methionine and tryptophan.
- Aggregation. Peptide molecules clump together, reducing potency.
- Microbial growth. Once a vial or pen has been pierced, bacteria can enter the formulation.
The manufacturer expiration date represents the period during which 95% or more of the labeled potency is guaranteed under proper storage. After expiration, potency loss isn't dramatic on day one, but it accelerates and isn't predictable.
The in-use date for opened pens and vials is governed mostly by sterility, not potency. Each time a needle pierces the rubber stopper, there's a small chance of contamination. The 28- or 56-day limit reflects how long the preservative system reliably keeps bacteria from growing.
How to read the expiration date on the package
For brand-name semaglutide:
- Cardboard carton: Printed as "EXP MM-YYYY" on a side panel. The drug is good through the last day of that month.
- Pen body: Same date printed on the pen label, sometimes with batch number.
- Vial cap (if vial): A two-line stamp with manufacturing date and expiration.
For compounded semaglutide:
- Vial label: Printed by the dispensing pharmacy. Usually shows "Beyond Use Date" or "BUD" followed by a calendar date.
- Outer packaging: Often duplicates the BUD on the shipping label.
If the date is unreadable or missing, contact the dispensing pharmacy. Don't guess.
Storage rules that affect shelf life
The expiration date assumes proper storage. Mishandling shortens the actual usable life of the drug, sometimes to zero.
Required:
- Refrigerated at 36 to 46 F (2 to 8 C) until first use
- Protected from light (keep in original carton)
- Not frozen, ever
Allowed:
- Room temperature up to 86 F (30 C) once in use
- Brief excursions to room temperature during travel (within manufacturer guidance)
Not allowed:
- Freezing. Once frozen, semaglutide is irreversibly damaged. Discard.
- Direct sunlight. Even a few hours can degrade the peptide.
- Vehicle storage. A car in summer heat reaches 130 F or higher.
- Bathroom storage. Humidity and temperature swings reduce stability.
- Behind the refrigerator vent. Vents can produce localized freezing.
If your pen or vial has been mishandled, look for visible signs of damage:
- Cloudy solution (should be clear)
- Particles floating in the liquid
- Color change to yellow or brown
- Frost or ice crystals
- A pen that won't dial properly
Any of these mean the drug is no longer reliable. Discard and request replacement.
We cover storage in detail at /articles/storage-and-travel/zepbound-and-warm-weather/.
What happens if you use expired semaglutide
Honest answer: nothing dramatic, usually, but you can't count on the drug working. Past the expiration date:
- Potency may have dropped. A dose dialed for 1 mg might deliver 0.7 mg if the peptide has degraded. You won't be able to tell from looking at the solution.
- Sterility is no longer guaranteed. A pen open for 60 days has had many needle punctures. Bacterial growth becomes more likely.
- Side effects from degradation products are theoretically possible but rarely reported.
The most common outcome of using expired semaglutide is reduced effectiveness. You'll notice less appetite suppression, less weight loss, possibly a return of food noise. By the time you notice, you've wasted weeks.
The clinically prudent decision is to discard expired drug and start a fresh pen or vial on schedule. Don't try to extend a pen by a few extra days to save money. The cost of a replacement is usually less than the cost of a wasted week of treatment.
How to dispose of expired semaglutide
Used and expired pens or vials should not go in regular trash without precautions. Recommended disposal:
- FDA take-back programs. Most pharmacies accept expired prescription medications. Walgreens and CVS have take-back kiosks in many locations.
- DEA National Take-Back Day. Twice a year (April and October), the DEA partners with local law enforcement for free, anonymous drug disposal.
- Mail-back envelopes. Some manufacturer programs and online pharmacies provide pre-paid return envelopes.
- Sharps container for needles. All used needles go in a puncture-proof sharps container. Hospitals and pharmacies often accept full sharps containers for disposal.
If take-back isn't accessible, the FDA's secondary recommendation for non-controlled prescription drugs is to mix the drug with an undesirable substance (used coffee grounds, kitty litter), seal the mixture in a bag, and put it in the household trash. Remove identifying labels first.
Don't flush semaglutide. The FDA's flush list includes only specific high-risk medications. Semaglutide isn't on it.
Travel and the cold chain
Maintaining the cold chain during travel is the most common practical question. The basic rules:
- Insulated cooler with ice pack. A small insulated bag with a frozen gel pack maintains 36 to 46 F for 24 to 36 hours. Don't let the pen or vial touch the ice pack directly; freezing damages the drug.
- Carry-on, not checked baggage. Cargo holds reach freezing temperatures. Pens have been ruined on transcontinental flights.
- TSA notification. GLP-1 medications are allowed through security. Tell the TSA officer you're carrying refrigerated medication. A printed prescription label helps but isn't required.
- Hotel mini-fridges. Most hotel mini-fridges hold 38 to 42 F adequately. Check temperature on arrival; some run too cold and freeze the drug.
- Power outages. Refrigerated semaglutide stays good for 4 to 6 hours during a power outage if the door stays closed. Beyond that, transfer to a cooler with ice.
For trips longer than a week, plan ahead. Calculate which doses you'll inject during the trip and bring slightly more than you need. Insurance will not replace a pen or vial damaged by mishandling.
We cover travel in detail at /articles/storage-and-travel/glp1-air-travel/.
FAQ
Does Ozempic expire? Yes. Unopened Ozempic pens carry a printed expiration date typically 24 months from manufacture, when stored refrigerated. Once a pen is in use, discard after 56 days regardless of remaining drug.
Does Wegovy expire? Yes. Wegovy pens have the same unopened shelf life as Ozempic. The in-use period is 28 days for Wegovy, shorter than Ozempic's 56 days. Note the difference if you're switching products.
Does compounded semaglutide expire faster than brand-name? Usually yes. Compounded semaglutide BUDs are typically 28 to 90 days, set by the dispensing pharmacy under USP Chapter 797. Brand-name unopened expiration runs 18 to 24 months.
Can I use semaglutide a few days past expiration? You can, but reliability isn't guaranteed. Potency may drop and sterility is no longer assured. Most providers recommend discarding expired drug. The cost of a replacement is usually less than the cost of a missed dose.
What happens if my semaglutide freezes? Discard it. Freezing irreversibly damages the peptide. Even a brief freeze, including a single overnight in a too-cold refrigerator vent, ruins the drug.
How do I know if my semaglutide is still good? Check the expiration date or beyond-use date on the label, the in-use date written on the pen or vial, and the appearance of the solution (should be clear and colorless). Cloudy, particulate, or frozen solution is no good.
Can I store semaglutide outside the refrigerator? Once in use, yes, up to 86 F for 28 days (Wegovy) or 56 days (Ozempic). Compounded products vary; follow the pharmacy label. Unopened semaglutide should always be refrigerated until first use.
Do I have to refrigerate semaglutide once I start using it? Refrigeration is preferred but not required during the in-use window. Many patients keep the active pen or vial at room temperature for the convenience of slightly warmer injections. Don't exceed 86 F.
How long does semaglutide last after being drawn into a syringe? Best practice is to inject within minutes of drawing. Pre-drawn syringes lose sterility and stability quickly. Most pharmacies don't endorse pre-drawing semaglutide more than a few hours in advance.
Why does Wegovy expire faster than Ozempic once opened? The in-use periods are set by the manufacturer based on stability data and preservative behavior. Wegovy's 28-day in-use period is shorter, possibly because higher doses are used. Both products use phenol as a preservative.
What about Rybelsus tablets? Do they expire? Yes. Rybelsus tablets carry a printed expiration date on the bottle. Tablets are stable at room temperature (59 to 86 F). Once the bottle is opened, the tablets remain usable until the printed expiration date if stored properly.
Is there a database for lot recalls? The FDA's Drug Recalls page lists active recalls. Sign up for FDA email alerts on Recalls and Safety Alerts to get notifications. Compounding pharmacies post their own recalls; ask the dispensing pharmacy how they communicate recalls.
Sources
- FDA prescribing information for Ozempic (semaglutide injection), Novo Nordisk, current revision.
- FDA prescribing information for Wegovy (semaglutide injection), Novo Nordisk, current revision.
- FDA prescribing information for Rybelsus (semaglutide tablets), Novo Nordisk, current revision.
- United States Pharmacopeia Chapter 797 on Pharmaceutical Compounding, Sterile Preparations.
- United States Pharmacopeia Chapter 800 on Hazardous Drugs Handling.
- FDA Drug Disposal Guidance for Consumers, current edition.
Footer disclaimers (all 4 verbatim)
Platform Disclaimer. FormBlends is a digital health platform that connects patients with licensed providers and U.S.-based pharmacies. We do not manufacture, prescribe, or dispense medication directly. All clinical decisions are made by independent licensed providers.
Compounded Medication Notice. Compounded semaglutide and tirzepatide are not FDA-approved. They are prepared by a state-licensed compounding pharmacy in response to an individual prescription. Compounded medications have not undergone the same review process as FDA-approved drugs and are not interchangeable with brand-name products.
Results Disclaimer. Individual results vary. Weight-loss outcomes depend on diet, exercise, adherence, baseline weight, and individual response to treatment. Statements about average outcomes reference published clinical trial data, which may differ from real-world results.
Trademark Notice. Ozempic, Wegovy, and Rybelsus are registered trademarks of Novo Nordisk A/S. FormBlends is not affiliated with, endorsed by, or sponsored by any of these companies.