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HealthRX.com · Printable dose-error record

Mounjaro out-of-fridge day counter and pen check

Keep this with your Mounjaro supply. It counts the days each pen or vial spends out of the refrigerator, records where it was kept, and lists the label's checks to run before every injection, at home or while traveling.

Companion to “Mounjaro Storage, Stability & Shelf Life: Evidence-Based Guide” · healthrx.com/mounjaro/storage-stability · Facts checked 2026-10-18

This pen or vial

Presentationsingle-dose pen, single-dose vial, KwikPen or multi-dose vial
Strength (mg)
Lot number
Expiration date (EXP)
Date of first useKwikPen or multi-dose vial only

Time out of the refrigerator

Write each stretch out of the fridge on its own line and keep a running total. Moving it back into the fridge pauses the count; it does not reset it.

Date taken outDate back in or usedDays out this timeRunning total of daysWhere it was keptFelt hot or cold to touch?

What the Mounjaro label allows

  • Refrigerate at 2°C to 8°C (36°F to 46°F) until needed.[1]
  • Single-dose pen or vial: up to a total of 21 days unrefrigerated, at no more than 30°C (86°F).[1]
  • Unopened KwikPen or multi-dose vial kept in the fridge: usable until the expiry date on the label.[1]
  • Opened KwikPen or multi-dose vial: throw away after 4 weekly doses, 30 days after first use, or 30 days at room temperature.[1]
  • Keep it in the original carton to protect it from light. Never use it if it has been frozen.[1]
  • Never share a KwikPen with another person, even with a new needle.[1]

Before each injection

  • Name and strength on the label match my prescription
  • Not past the EXP date and not damaged
  • Never frozen, including during shipping or travel
  • Medicine is clear, colorless to slightly yellow, with no particles
  • Running total of room-temperature days is still under the limit for this presentation
  • Kept in its carton, away from heat and direct light

Travel plan

Trip dates and number of doses needed
How the pens will travelcarry-on bag, insulated pouch; not against ice packs
Refrigerator available at the destination?
Pharmacy to call there if a pen is lost or spoiled

Questions for the pharmacist

  1. My pen was somewhere hotter than 86°F. Can I still use it, or does it need replacing?
  2. My mail-order box arrived warm with melted cold packs. What should I do with the pens?
  3. Does my plan replace a pen that spoiled while I was traveling?
  4. Which presentation am I getting next time, and do its storage rules differ from what I have now?
Sources for the facts on this sheet
  1. Eli Lilly and Company, via DailyMed. Mounjaro (tirzepatide) injection, for subcutaneous use: prescribing information and Medication Guide. Effective 2026-08-27. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=d2d7da5d-ad07-4228-955f-cf7e355c8cc0

This sheet records information for a conversation with your prescriber or pharmacist. It does not replace their instructions or the medication's prescribing information.