From the FDA label (DailyMed)Verified 2026-07-12

Zepbound Storage & Handling

Where tirzepatide belongs and for how long: the cold range, the warm allowance, and what to do about a dose that froze or sat in the sun — read straight off the FDA prescribing information.

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Zepbound Storage at a Glance

Refrigerated (unopened)

36°F to 46°F (2°C to 8°C)

Room-temperature allowance

Single-dose pen/vial: up to 30°C (86°F) for a total of 21 days, then discard. Multi-dose vial/single-patient-use KwikPen: up to 30°C (86°F) for 30 days if never refrigerated, or 30 days after first use once opened.

Freezing

Do not freeze ZEPBOUND. Do not use ZEPBOUND if it has been frozen.

Light

Store ZEPBOUND in its original carton to protect it from light.

Source: Zepbound FDA prescribing information via DailyMed (SetID 487cd7e7-434c-4925-99fa-aa80b1cc776b), Section 16.2 How Supplied/Storage and Handling, read on 2026-07-12. Treat this as a summary: the full label and the patient instructions in your box are the authority.

Handling the pen or vial

Once you start using it: the in-use window is 21 days at room temperature (single-dose pen/vial). Write down the day you first used it — on the device itself or in your calendar — because the label says discard at the end of that window regardless of how much is left.

The carton it arrived in is the light protection, and the obvious place to write the first-use date, so keep the pen or vial inside it wherever you can. Between doses the needle comes off; a pen should never be stored with one attached.

Traveling with Zepbound

Traveling cold means an insulated bag with an ice pack the carton does not sit against. Traveling warm means writing down the day it left the fridge, because that clock — 21 days for a single-dose pen or vial, 30 for the multi-dose — does not reset if you chill it again later.

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Frequently Asked Questions

An unopened Zepbound belongs in the fridge at 36°F to 46°F (2°C to 8°C). Single-dose pen/vial: up to 30°C (86°F) for a total of 21 days, then discard. Multi-dose vial/single-patient-use KwikPen: up to 30°C (86°F) for 30 days if never refrigerated, or 30 days after first use once opened. Taken from the FDA label on DailyMed, SetID 487cd7e7-434c-4925-99fa-aa80b1cc776b, Section 16.2, read on 2026-07-12.

It survives, but on a clock. Single-dose pen/vial: up to 30°C (86°F) for a total of 21 days, then discard. Multi-dose vial/single-patient-use KwikPen: up to 30°C (86°F) for 30 days if never refrigerated, or 30 days after first use once opened. Once that clock starts it does not stop: throw the product away after 21 days at room temperature (single-dose pen/vial), however much is left inside.

Do not freeze ZEPBOUND. Do not use ZEPBOUND if it has been frozen. Where you cannot be certain a dose stayed above freezing, treat it as unusable and ask your pharmacy for a replacement rather than risking it.