How to Store GLP-1 Medication: Fridge, Room Temperature and When to Throw It Out

Store GLP-1 pens and vials in the refrigerator at 36–46°F (2–8°C), and never freeze them¹. Each product allows limited time at room temperature: up to 28 days for a Wegovy single-dose pen, 56 days for a FlexTouch pen after first use, and 21 days in total for a Zepbound single-dose pen or vial, or 30 days for a Zepbound KwikPen^1,2.

Almost everyone asks this after the first delivery arrives: does it have to live in the fridge, and what happens if it doesn't? The answers are on each drug's own label, they are specific, and — this is the part that catches people — they are different for each product. Applying Wegovy's number to Zepbound, or a brand number to a compounded vial, is the mistake worth avoiding.

The short answer

Keep it in the refrigerator at 36–46°F (2–8°C). Do not freeze it. Do not put it against the back wall next to the cooling element, which is where things quietly freeze¹. If it needs to come out — travel, a broken fridge, a delivery that sat on a porch — each product allows a limited, one-way window at room temperature, and once that window is used it does not reset by putting the pen back in the cold.

Wegovy (semaglutide): 28 days, or 56 for the FlexTouch pen

The label splits by device, and the two numbers are genuinely different.

The single-dose pen and single-dose prefilled syringe are stored in the refrigerator at 2–8°C. If needed, they can be kept out of the refrigerator between 8–30°C (46–86°F) for up to 28 days. The label is explicit about what ends a pen's life: throw it away if it has been frozen, has been exposed to light or to temperatures above 86°F (30°C), or has been out of the refrigerator for 28 days or longer¹.

The FlexTouch single-patient-use pen — the multi-dose one — is refrigerated before first use, and *after* first use may be kept between 15–30°C (59–86°F) or back in the refrigerator for up to 56 days¹. Same molecule, double the window, because it is a different device.

Wegovy tablets are not a fridge product at all: store them at room temperature, 68–77°F (20–25°C)¹.

Zepbound (tirzepatide): 21 days for a single-dose pen, 30 for a KwikPen

Zepbound's single-dose pen and single-dose vial are refrigerated at 2–8°C. If needed, each can be stored unrefrigerated at temperatures not exceeding 30°C (86°F) for up to a total of 21 days, and the label says to discard the pen or vial after a total of 21 days at room temperature².

Note the word *total*. Three days out for a trip, then back in the fridge, then five more days out later, uses eight of the 21. It is a running clock, not a fresh allowance each time.

The Zepbound KwikPen and the multi-dose vial work differently, because each holds four weekly doses. Unopened, they stay in the fridge until the expiry date, or up to 30 days at room temperature. Once you have used one, you can keep it in its carton in the fridge or at room temperature up to 30°C (86°F), and the label says to throw it away after a total of 30 days at room temperature, 30 days after first use, or after 4 weekly doses, whichever comes first — even if medicine is left in it².

Compounded semaglutide or tirzepatide: there is no label, so ask the pharmacy

This is the gap most people do not realize they are standing in. A compounded preparation has no FDA-approved prescribing information, so none of the numbers above are its numbers. What governs it is the beyond-use date the compounding pharmacy assigns and prints, which reflects that pharmacy's own formulation, its testing and the container it used. Two compounded vials of the same molecule from two pharmacies can carry different dates, and neither is wrong.

So: read the vial, and if the label is vague, call the pharmacy your provider named rather than guessing off a brand-name figure you found online. If your provider will not name the pharmacy at all, that is worth knowing for other reasons too — see is compounded GLP-1 legit and safe.

Compounded vials also come with a second, unrelated hazard the FDA has flagged directly: dosing errors, where patients drew the wrong volume because the vial was measured in milligrams and the syringe in units³. That is a different problem from storage, and we cover the arithmetic in GLP-1 units to mg conversion.

What actually ruins it

Three things, in rough order of how often they happen.

Freezing. The most common way to spoil a pen is not heat, it is the back of the fridge. A GLP-1 that has frozen is discarded, not thawed and used — both labels say so plainly^1,2.

Heat above 86°F (30°C). A car in summer, a mailbox in the afternoon, a windowsill. Wegovy's label names light exposure alongside heat as a discard trigger¹.

Running out the room-temperature clock. This is the one that is invisible: nothing about the pen looks different at day 29. Write the date you took it out of the fridge on the carton — Wegovy's own instructions for the prefilled syringe tell you to record exactly that¹.

The delivery that arrived warm

Most telehealth GLP-1s ship cold-chain with a gel pack, and most arrive fine. If a package clearly sat somewhere hot, or the pack arrived at ambient temperature, do not split the difference and use it anyway — contact the pharmacy or provider, because a replacement for a heat-excursion shipment is a normal request and reputable programs handle it. If your program's refund policy makes that hard, that is a fact worth knowing before you buy, not after — a lot of the fine print we read on provider reviews turns on exactly this.

The honest takeaway: fridge at 2–8°C, never frozen, never above 30°C, and the room-temperature window is 28 days for a Wegovy single-dose pen, 56 for a FlexTouch after first use, 21 total for a Zepbound single-dose pen, and 30 days from first use for a Zepbound KwikPen. For anything compounded, the pharmacy's beyond-use date is the only number that applies — read the vial, and ask if it is unclear.