How long can compounded semaglutide stay out of the fridge?

How long can compounded semaglutide stay out of the fridge?

Quick answer: No FDA-approved number exists for compounded vials. Follow the storage line on your pharmacy label and its beyond-use date, and ask the pharmacy if it says nothing.

Use the dose on your label from your REMEVi provider; this page explains the units, it does not set your dose.

Brand-name medicines come with FDA-approved storage limits because the FDA reviewed data on how those exact products hold up. Compounded semaglutide and tirzepatide are prepared by licensed pharmacies for an individual prescription. They are not FDA-approved, and the FDA has not reviewed them for safety, effectiveness or quality. So there is no FDA-approved out-of-fridge limit for a compounded vial. Its storage directions come from the pharmacy that made it, printed on the label along with a beyond-use date.

The FDA’s starting point (current as of October 1, 2026): “Injectable GLP-1 drugs require refrigeration as indicated in their package inserts.” And USP’s pharmacy standard (FAQs, December 11, 2023) explains why cold matters for compounded sterile preparations: longer beyond-use dates are generally allowed for colder storage, because cold slows the growth of most microorganisms. A beyond-use date set for the fridge assumes the vial stayed in the fridge.

What do the brand-name labels say about room temperature?

Quick answer: Brand limits run from 21 to 56 days, depending on the product and whether it has been opened. They apply to those FDA-approved products, not to compounded vials.

Here is what each manufacturer’s label says, in its own terms. Notice how much the limits differ between products — even between two presentations of the same brand. That is the clearest reason not to borrow a brand number for a compounded vial.

Wegovy®, Ozempic®, Zepbound® and Mounjaro® are FDA-approved brand-name products that REMEVi does not sell. Facts quoted from their labels describe those products only. We name them to orient you, not to suggest a compounded medication is equivalent to them.

Why not borrow the brand number? Because it was set for one specific product. The FDA notes that compounded semaglutide comes in varying concentrations, and that some compounders add other ingredients such as vitamin B12, B6, L-carnitine or NAD (FDA alert, July 26, 2024). A storage limit that holds for one formula says nothing reliable about a different one. Your pharmacy label is the instruction written for the vial in your hand.

What if my semaglutide arrives warm?

Quick answer: Don’t use it. The FDA advises against using any injectable GLP-1 that arrives warm or without enough refrigeration. Call REMEVi before injecting.

The FDA (October 1, 2026) says it has received complaints that certain compounded GLP-1 drugs “have arrived warm or with inadequate ice packs,” and it recommends that patients “not use any injectable GLP-1 drug that arrives warm or with insufficient refrigeration, as this can affect the drug’s quality.”

If your package arrives warm, keep the vial and the packaging, don’t inject from it, and contact REMEVi at (702) 352-4746 so the care team can sort out next steps with the pharmacy. Open the box as soon as it arrives rather than leaving it on the doorstep, and if your label says to refrigerate, put the vial straight into the fridge.

Can semaglutide be frozen?

Quick answer: Every brand label we checked says do not freeze, and do not use the medicine if it has been frozen. Check your pharmacy label for a compounded vial.

Novo Nordisk’s labels for Wegovy® (revised 06/2026) and Ozempic® (revised 05/2026) say not to store the medicine in the freezer or directly beside the refrigerator’s cooling element, and not to use it if it has been frozen. Lilly’s Zepbound® and Mounjaro® labels (revised 08/2026) also say do not freeze and do not use if frozen.

Those are brand facts. For a compounded vial, the storage directions are the pharmacy’s. If a compounded vial was ever frozen, don’t use it until the pharmacy or your REMEVi care team has told you what to do.

Does light or heat matter?

Quick answer: Brand labels say to protect the medicine from heat and light and keep it in the original carton. Your compounded vial’s label sets its own storage.

Lilly’s labels say to “protect ZEPBOUND from heat and light” and to store it in the original carton to protect from light; the Mounjaro® label says the same. Novo’s Ozempic® label says the pen “should be protected from excessive heat and sunlight,” and Wegovy®’s says to throw a single-dose pen away if it has been exposed to light or to temperatures above 86°F.

Keep your compounded vial in the box or bag it came in, if your label says to, and away from a sunny window, a hot car or the stove. When the label and this page disagree, the label wins.

I left my vial out overnight. Can I still use it?

Quick answer: Don’t guess. Call the pharmacy or your REMEVi care team, say how long it was out and how warm it got, and follow their answer.

A brand label’s 21 or 56 days does not transfer to a compounded vial, and there is no FDA-approved number to fall back on. The people who can answer are the pharmacy that made the vial and your REMEVi care team. Have the vial label in hand when you call, and note roughly when the vial came out and how warm the room or car was. The 28-day limit after first use and the beyond-use date still apply either way — how many doses are in a vial and how long it lasts.

Questions about your vial, syringe or label? Message your REMEVi care team or call (702) 352-4746 before you inject.