How Long Trulicity Can Sit Out of the Refrigerator Before It Spoils

Trulicity stays safe at room temperature for up to 30 days, but only if it has never been used

Trulicity (dulaglutide) is a injectable medication for type 2 diabetes that comes pre-filled in a pen. The manufacturer's guidance is clear: an unused Trulicity pen can remain at room temperature between 59°F and 86°F for up to 30 days. Once that 30-day window closes, the medication loses potency and should be discarded, even if it looks normal.

This matters because many people store Trulicity in the refrigerator at home but need to carry it with them or travel. Knowing the exact time limit helps you avoid wasting an expensive medication or accidentally using one that no longer works as intended.

Key Takeaways

• An unopened Trulicity pen lasts 30 days at room temperature (59°F to 86°F) before it must be thrown away.
• Once you use a pen for the first injection, it must go back in the refrigerator and be used within 14 days.
• If Trulicity freezes or gets too hot (above 86°F), throw it away immediately—do not use it.
• Mark the date you remove Trulicity from the refrigerator on the pen itself so you know when the 30-day window ends.
• Trulicity that has been left out longer than 30 days should be discarded, even if it appears unchanged.

The 30-day room temperature window applies only to unused pens

The 30-day limit is specifically for pens that have never been injected. This is your travel window—the time you can safely keep Trulicity in a bag, at work, or in a hotel room without refrigeration. The clock starts the moment you remove it from the refrigerator, not the moment you buy it.

Many people misunderstand this rule and think they can leave Trulicity out indefinitely as long as it looks clear and colorless. The medication degrades at the molecular level even when it appears fine to the eye. After 30 days, the active ingredient breaks down enough that the dose you inject may not work as your doctor intended.

What happens after you use a pen for the first time

Once you inject from a Trulicity pen, the rules change. A pen that has been used must go back into the refrigerator immediately and can only stay out of cold storage for a maximum of 8 hours total during the week you are using it. After you have used the pen, it has 14 days to be used up completely before it must be discarded.

This shorter timeline exists because the needle puncture introduces the possibility of contamination. Even though Trulicity pens have a protective cap, the injection site is no longer sterile once breached. Keeping it refrigerated slows bacterial growth and preserves the medication's stability during that 14-day window.

Temperature extremes that require immediate disposal

Trulicity is sensitive to both heat and cold. If the pen freezes—whether in a car during winter or accidentally in a freezer—discard it. Freezing damages the protein structure of the medication and makes it unsafe to use. Similarly, if Trulicity is exposed to temperatures above 86°F for any length of time, it should be thrown away.

Heat exposure is more common than freezing. Leaving Trulicity in a hot car, near a sunny window, or in a warm bathroom can degrade it faster than the standard room temperature timeline. If you are unsure whether the pen has been exposed to unsafe heat, contact your pharmacy or the manufacturer's customer service line—they can advise based on how long and how hot the exposure was.

How to track the 30-day countdown

Write the date directly on the Trulicity pen with a permanent marker when you remove it from the refrigerator. Include both the start date and the discard date (30 days later). This takes the guesswork out of remembering how long it has been sitting out and prevents accidental use of expired medication.

If you travel frequently or move Trulicity in and out of the refrigerator, keep a small notebook or phone note with the removal date. Some people use a simple calendar reminder set for day 28, giving them a two-day buffer to use the pen or prepare a fresh one from the refrigerator.

Storage between injections during the week you are using it

During the week you are actively using a Trulicity pen, store it in the refrigerator between injections. You can take it out for up to 8 hours total during that week—for example, carrying it to an appointment or keeping it at work during the day. Once the 8-hour window is used up, the pen must stay refrigerated for the remainder of that week.

This 8-hour allowance is meant for convenience, not for extended travel. If you need to be away from refrigeration for longer than 8 hours during the week you are using a pen, ask your doctor or pharmacist about adjusting your injection schedule or using a cooling case designed for insulin and injectable medications.

What to do if Trulicity has been left out too long

If you realize a pen has been at room temperature for more than 30 days, or if you cannot remember when it was removed from the refrigerator, do not use it. Contact your pharmacy to request a replacement. Many insurance plans and patient assistance programs cover replacement doses if the medication was damaged due to storage error.

Trulicity is expensive, and the instinct to use it anyway is understandable. But an ineffective dose does not lower your blood sugar and wastes the medication without giving you the benefit you need. Your pharmacist can often expedite a replacement, especially if you explain that the pen was damaged by temperature exposure.

Frequently Asked Questions

Can I use Trulicity if it was left out for 35 days?

No. Once Trulicity exceeds 30 days at room temperature, the medication degrades beyond safe and effective levels. Discard it and contact your pharmacy for a replacement. Using expired medication puts your blood sugar management at risk.

What if I left Trulicity in a car overnight in summer?

If the car was very hot (above 86°F), discard the pen. Heat breaks down the medication faster than room temperature. If you are unsure how hot it got, call your pharmacy or the Trulicity customer service line—they can advise based on the likely temperature range in your area that night.

Does Trulicity go bad if I refrigerate it after leaving it out?

No. If you remove Trulicity from the refrigerator and then put it back before 30 days have passed, it is still safe to use. The 30-day window is continuous from the moment you first remove it, but refrigeration does not reset the clock or damage the medication.

Can I use a cooling case to extend the time Trulicity can be out?

A cooling case keeps Trulicity at refrigerator temperature, which means it does not count toward the 30-day room temperature limit. If you use a cooling case during travel, Trulicity stays stable as long as the case maintains the correct temperature (36°F to 46°F). Check the case's specifications to confirm it reaches that range.

What if my Trulicity pen was frozen by accident?

Discard it. Freezing damages the protein structure of dulaglutide and makes it unsafe to inject. Do not try to thaw it and use it. Contact your pharmacy for a replacement dose.