How to Store Tirzepatide: Refrigeration and Shelf Life
Whether Tirzepatide needs refrigeration, how long powder and mixed vials keep, and what to do if a vial got warm.
For the FDA-approved product, the label and package insert are the authority on storage. The notes below are for vials of powder that are mixed before use.
Storage at a glance
Quoted from the FDA label, with the source for each row.
| Condition | What the source says | Source type | Source |
|---|---|---|---|
| Single-dose pen or vial, unopened | Store MOUNJARO single-dose pen and single-dose vial in a refrigerator at 2°C to 8°C (36°F to 46°F). | FDA label | FDA label (Mounjaro) |
| Room-temperature excursion | If needed, each single-dose pen or single-dose vial can be stored unrefrigerated at temperatures not to exceed 30°C (86°F) for up to a total of 21 days. | FDA label | FDA label (Mounjaro) |
| Freezing | Do not freeze MOUNJARO. Do not use MOUNJARO if frozen. | FDA label | FDA label (Mounjaro) |
| Single-dose pen or vial, unopened | Store ZEPBOUND single-dose pen and single-dose vial in a refrigerator at 2°C to 8°C (36°F to 46°F). | FDA label | FDA label (Zepbound) |
| Room-temperature excursion | If needed, each single-dose pen or single-dose vial can be stored unrefrigerated at temperatures not to exceed 30°C (86°F) for up to a total of 21 days. | FDA label | FDA label (Zepbound) |
| Freezing | Do not freeze ZEPBOUND. Do not use ZEPBOUND if frozen. | FDA label | FDA label (Zepbound) |
Unmixed powder
Freeze-dried (lyophilized) powder is the form most vials ship in. Sourced conditions for Tirzepatide are in the table above; anything they do not cover is unverified.
- Keep vials sealed, dry and out of direct light and heat until use.
- Check the label for a lot number and an expiry date. A vial with neither tells you nothing about its age.
After mixing
Once mixed with bacteriostatic water, peptide vials are usually kept in the refrigerator and used within a limited time. Sourced conditions for Tirzepatide are in the table above; anything they do not cover is unverified.
- Write the mixing date on the vial.
- Swab the rubber top with alcohol before every draw.
- Do not freeze a mixed vial unless the product information says you can.
If it got warm or looks wrong
How much potency Tirzepatide loses after a temperature slip is not covered by any published stability study we found. When in doubt, ask a pharmacist.
Common questions
Does Tirzepatide need to be refrigerated?
Follow the storage instructions on the approved product's label (quoted on this page). Compounded or research versions should come with their own instructions; if they don't, ask the pharmacy.
How long is Tirzepatide good for after mixing?
That depends on the product and how it was mixed. We publish a shelf life only from a manufacturer or a stability study; the sourced conditions are on this page.
More on Tirzepatide
Sources
- 1These highlights do not include all the information needed to use MOUNJARO safely and effectively. See full prescribing information for MOUNJARO. MOUNJARO ® (tirzepatide) Injection, for subcutaneous uFDA label (Mounjaro), DailyMed · current labeldailymed.nlm.nih.govAccessed 2 Oct 2026
- 2These highlights do not include all the information needed to use ZEPBOUND safely and effectively. See full prescribing information for ZEPBOUND. ZEPBOUND ® (tirzepatide) Injection, for subcutaneous uFDA label (Zepbound), DailyMed · current labeldailymed.nlm.nih.govAccessed 2 Oct 2026
Found an error? Report a correction.