Peptide Dose Tracker

GLP-1 Left Out of the Fridge: Where Each Label Sets Its Limits

Your own label says whether your pen or vial may stay out of the fridge, for how long, and how warm is too warm. For a GLP-1 left out of the fridge, those limits differ by product, by pen, vial or syringe, and by whether it has been used1234.

Where each label prints its limits

These are the labels posted on DailyMed, read on Oct 12, 2026. Each one covers only its own product.

  • Zepbound (tirzepatide) and Mounjaro (tirzepatide). Separate limits for a single-dose pen or vial, and for a multi-dose vial or KwikPen, unopened or opened12.
  • Ozempic (semaglutide). Separate limits for a new pen, a pen in use, and the single-dose prefilled syringe3.
  • Wegovy (semaglutide). Separate limits for the single-dose pen or syringe, and for a new or in-use FlexTouch pen4.

In the Prescribing Information, look in section 16, How Supplied/Storage and Handling. The Instructions for Use for your pen, vial or syringe has its own storage part, and some Medication Guides do too1234.

Where a label allows time out of the fridge, it gives a time limit and a top temperature1234. All four say not to use the product if it has been frozen1234.

If your vial is compounded

A compounded semaglutide or tirzepatide vial does not come with one of these labels. FDA says injectable GLP-1 drugs need refrigeration as their package inserts state5. It has had complaints of compounded GLP-1 drugs that arrived warm or with too few ice packs, and says not to use any that arrive that way5.

For the instructions on your vial, FDA says to contact the compounder or the telehealth platform5. For where those dates sit on a label, see where to find your storage and expiry dates.

What to write down

Note when the pen or vial went out of the fridge, when you noticed, and where it was. Have those details ready for your pharmacist.

The peptide tracker keeps the discard-by date and lot number you type from your label, and each logged shot can carry a note. Open the tracker (free, no account). For opened vials, see the discard-by date for an opened vial.

What to ask your pharmacist

  • My pen or vial was out of the fridge for this long, at about this temperature. Can I still use it?
  • Does the time out of the fridge change my discard-by date?
  • How should it travel with me, and how should it arrive by mail?

For trips, see traveling with injectable medication.

Questions

What happens if my GLP-1 gets warm?

Your label's storage section says how warm is too warm, and for how long1234. For a compounded vial, FDA says not to use an injectable GLP-1 that arrives warm or without enough cooling5. Ask your pharmacist about your own pen or vial.

Can I use a pen left out overnight?

This page cannot tell you that. Check the storage section of your product's label, and ask your pharmacist, who knows your product and how it was kept.

How long can a GLP-1 pen be unrefrigerated?

It depends on the product and on whether the pen has been used. Each label sets its own limit1234, and a compounded vial has none of these labels: FDA says injectable GLP-1 drugs need refrigeration as their package inserts state5. Read the storage section of your own label and ask your pharmacist.

Read this first. Information only, not medical advice. This site does not recommend amounts. Talk to your prescriber or pharmacist about your own situation. 18+. Questions about your medicine, symptoms or a reaction? Contact your clinician or pharmacist. In an emergency, call 911. Poison Help: 1-800-222-1222.

Editorial review against cited sources. Last checked Oct 12, 2026.

Sources

  1. DailyMed: Zepbound label (opens in a new tab), FDA-reviewed label posted on DailyMed (U.S. National Library of Medicine), labeler Eli Lilly and Company. SPL version 40, label effective 2026-08-28 (Prescribing Information revised 08/2026); DailyMed listing posted Sep 02, 2026.
  2. DailyMed: Mounjaro label (opens in a new tab), FDA-reviewed label posted on DailyMed (U.S. National Library of Medicine), labeler Eli Lilly and Company. SPL version 40, label effective 2026-08-27 (Prescribing Information revised August 2026); DailyMed listing posted Sep 02, 2026.
  3. DailyMed: Ozempic label (opens in a new tab), FDA-reviewed label posted on DailyMed (U.S. National Library of Medicine), labeler Novo Nordisk. SPL version 20, label effective 2026-06-01 (Prescribing Information revised June 2026); DailyMed listing posted Jun 10, 2026.
  4. DailyMed: Wegovy label (opens in a new tab), FDA-reviewed label posted on DailyMed (U.S. National Library of Medicine), labeler Novo Nordisk. SPL version 19, label effective 2026-06-18 (Medication Guide revised 06/2026); DailyMed listing posted Jun 30, 2026.
  5. FDA: concerns with unapproved GLP-1 drugs (opens in a new tab), U.S. Food and Drug Administration. Content current as of 10/01/2026.