Trulicity left out of the refrigerator is not automatically ruined. The medication can safely stay at room temperature for up to 14 days, as long as the temperature stays below 86°F (30°C). After that 14-day window, or if it was exposed to higher heat, the pen should be discarded.
The 14-Day Room Temperature Rule
Trulicity’s FDA-approved labeling is straightforward: store it in the refrigerator at 36°F to 46°F (2°C to 8°C), but when refrigeration isn’t available, a single pen can remain at room temperature below 86°F for a total of 14 days. This is a cumulative clock. If you left the pen out for 3 days, put it back in the fridge, then took it out again for 5 days, you’ve used 8 of your 14 days. There is no limit to how many times the pen goes in and out of the fridge, as long as the total unrefrigerated time doesn’t exceed 14 days (336 hours).
Once that 14-day total is reached, the manufacturer considers the pen no longer reliable, even if it looks perfectly fine. Discard it and use a new one.
What Actually Degrades the Medication
Trulicity contains dulaglutide, a protein-based drug. Proteins are sensitive to temperature extremes. Heat above 86°F causes the protein molecules to unfold and lose their shape, which is what allows them to work in your body. A pen left in a hot car on a summer day, sitting on a sunny windowsill, or stored anywhere temperatures climb above that threshold may have lost potency in ways you can’t detect by looking at it.
Freezing is equally damaging. If Trulicity has been frozen at any point, do not use it. Freezing can break apart the protein structure and also damage the pen’s delivery mechanism. This matters when using a travel cooler: the pen should never directly touch ice or frozen gel packs.
How to Tell if a Pen Is Compromised
Before injecting, always look at the liquid through the pen’s viewing window. Normal Trulicity is clear and colorless to slightly yellow. Do not use the pen if:
- The liquid looks cloudy
- You see floating particles or specks
- The color has changed noticeably
These visual changes indicate the protein has broken down. That said, a pen can lose potency without any visible change, which is why the 14-day and temperature limits exist even when the liquid still looks normal. If you know the pen exceeded 86°F or spent more than 14 days unrefrigerated, discard it regardless of appearance.
What Happens if You Inject a Degraded Pen
Using Trulicity that has lost potency from improper storage is unlikely to cause a dangerous reaction, but it may not control your blood sugar effectively. You could experience higher-than-expected glucose readings after your injection without an obvious explanation. If you used a pen that was left out too long or exposed to heat and notice your blood sugar running higher than usual in the days that follow, the storage issue is the likely culprit. You’d need to use a properly stored pen for your next dose to get back on track.
Keeping Trulicity Safe During Travel
Travel is the most common reason Trulicity ends up outside a refrigerator, and the 14-day rule gives you a reasonable buffer for most trips. A few practical details from the manufacturer make travel easier:
- Airplane carry-on only. Always pack Trulicity in your carry-on bag. Checked luggage sits in cargo holds where temperatures can swing from freezing to extreme heat.
- Cooling cases work, with caution. If you use a travel cooler, wrap the pen or place a barrier between it and any ice or gel packs. Direct contact with frozen surfaces can freeze the medication.
- Airport X-rays are fine. Security screening does not affect dulaglutide, and changes in cabin air pressure won’t damage the glass syringe inside the pen.
For trips longer than two weeks without fridge access, you’ll need a portable medical cooler that maintains the 36°F to 46°F range. Battery-powered options designed for insulin and similar medications work well for this.
Quick Reference: Safe vs. Unsafe Storage
- Safe: Refrigerator at 36°F to 46°F, for the full shelf life printed on the box.
- Safe: Room temperature below 86°F, for up to 14 cumulative days.
- Unsafe: Any exposure above 86°F, even briefly.
- Unsafe: Any exposure to freezing temperatures.
- Unsafe: More than 14 total days outside the refrigerator, even if below 86°F.
If you’re unsure how long a pen sat out or what temperature it reached, the safest choice is to discard it and start with a fresh pen from the refrigerator.