How Long Trulicity Lasts in Your Refrigerator

Trulicity stays good for 30 days once you open the pen, even if you keep it in the refrigerator the whole time

Trulicity (dulaglutide) is a diabetes medication that comes in a pre-filled pen. Once you remove it from the pharmacy box and begin using it, you have exactly 30 days before you must throw it away—regardless of how carefully you store it. This 30-day window applies whether the pen sits in your refrigerator at 36–46°F or at room temperature up to 86°F. The clock starts the moment you first use the pen, not when you open the box.

Before you use it for the first time, an unopened Trulicity pen lasts much longer. An unused pen can stay in the refrigerator for up to 24 months (check your specific expiration date on the box). If you need to travel or your refrigerator fails, an unopened pen can survive at room temperature for up to 30 days without losing potency. Once that 30-day room-temperature window closes, an unopened pen must go back into the refrigerator or be discarded.

Key Takeaways

• An opened Trulicity pen lasts exactly 30 days in the refrigerator, and you must discard it after that period regardless of how much medication remains.
• An unopened pen stays stable in the refrigerator for up to 24 months, but can only survive 30 days at room temperature before it must be refrigerated or thrown away.
• Once an unopened pen has spent 30 days at room temperature, it cannot be returned to the refrigerator to extend its life—it must be discarded.
• Trulicity pens should never be frozen, and exposure to temperatures below 36°F or above 86°F can damage the medication permanently.

Storage temperature matters before you open the pen

Unopened Trulicity pens have two distinct storage phases. In the refrigerator at 36–46°F, they remain stable for their full shelf life, which is printed on the box (typically 24 months from the pharmacy date). This is the ideal storage location and the one your pharmacy recommends.

If you travel, lose power, or need to keep an unopened pen outside the refrigerator, it can survive at room temperature (up to 86°F) for a maximum of 30 days. After 30 days at room temperature, the pen must either return to the refrigerator immediately or be discarded. You cannot extend the room-temperature period by moving the pen back to cold storage. Once that 30-day window closes, the medication's stability is compromised and it is no longer safe to use.

Never freeze Trulicity. Freezing damages the protein structure of the medication and makes it unsafe. If a pen has been frozen, discard it even if it still looks normal.

The 30-day countdown after your first injection

The moment you inject yourself with Trulicity for the first time, a 30-day timer begins. This deadline is firm and does not change based on storage conditions. Whether you keep the pen in the refrigerator, on your kitchen counter, or in a cool closet, you must throw away the pen on day 31.

Write the date you first use the pen directly on the pen itself with a permanent marker. This prevents confusion if you have multiple pens or if someone else in your household uses the refrigerator. Many people write both the start date and the discard date (30 days later) so there is no guesswork.

If you forget when you opened the pen, err on the side of caution and discard it. Using expired or degraded Trulicity can reduce its effectiveness and may not control your blood sugar as intended. The cost of a replacement pen is worth the safety of your treatment.

How to store an opened pen in the refrigerator

Keep your opened Trulicity pen in the main body of the refrigerator at 36–46°F, not in the freezer compartment or on the door. The door is warmer and experiences temperature swings every time it opens, which can shorten the pen's life. Store it in a spot where it will not be knocked over or exposed to direct light.

Do not store Trulicity near foods with strong odors, though the pen's sealed cap protects the needle and medication from absorbing smells. Keep it away from children and pets, and never leave it in a car, purse, or bag where temperature can fluctuate wildly.

If you travel and need to bring your opened pen with you, use an insulated travel case designed for insulin or diabetes medications. These cases maintain a cool temperature for several hours and are inexpensive. If you will be away longer than a few hours, bring a small cooler with an ice pack (not touching the pen directly) or ask your hotel for refrigerator access.

What happens if Trulicity gets too warm or too cold

Trulicity is a protein-based medication, and proteins are sensitive to temperature extremes. If an opened pen sits above 86°F for more than a few hours—such as in a hot car or on a sunny windowsill—the medication begins to break down. You may not see any visible change, but the drug's potency decreases, meaning your injection may not work as well.

If a pen has been left in heat, place it in the refrigerator immediately and contact your pharmacist or doctor. They can advise whether the pen is still safe to use based on how long it was exposed and how warm it got. When in doubt, discard the pen and get a replacement.

Freezing is equally damaging. If a pen has been frozen, even partially, discard it. Frozen Trulicity cannot be thawed and reused safely. The ice crystals that form inside the pen damage the medication's molecular structure permanently.

Signs your Trulicity pen may be damaged

Before each injection, inspect your pen for signs of damage. Look for cloudiness, particles, or discoloration in the medication. Trulicity should be clear and colorless. If it looks cloudy, has visible particles, or appears discolored, do not use it—discard it and contact your pharmacy for a replacement.

Check the pen's exterior for cracks, leaks, or damage to the needle cap. A damaged pen may leak or allow air inside, which can contaminate the medication. If the pen feels unusually warm or cold to the touch, or if you know it has been exposed to extreme temperatures, do not use it.

If you are unsure whether a pen is safe, call your pharmacist. They have access to your prescription records and can tell you whether a replacement is covered or if you need to contact your doctor. It is always safer to ask than to risk an ineffective dose.

Disposing of used Trulicity pens safely

Never throw a used Trulicity pen in the regular trash or down the toilet. The needle poses a sharps injury risk to sanitation workers, and the medication can contaminate water supplies. Instead, place the used pen in a sharps container—a rigid, puncture-proof container designed for needles and syringes.

You can buy a sharps container at any pharmacy, usually for a few dollars. Fill it until it is three-quarters full, then seal it and take it to a pharmacy or hospital for proper disposal. Many pharmacies accept sharps containers free of charge. Some communities also have hazardous waste collection events where you can drop off sharps containers.

If you do not have access to a sharps container, ask your pharmacist for guidance on safe disposal in your area. Never recap a used needle by hand, and never leave a used pen where children or pets can reach it.

Frequently Asked Questions

Can I use Trulicity after the 30-day mark if it still looks clear?

No. The 30-day limit is based on how long the medication remains stable and sterile, not on how it looks. Trulicity can appear clear and normal while the drug's potency has already declined. Discard it on day 31 regardless of appearance.

What if I miss a dose and find my pen in the refrigerator weeks later?

If the pen is past the 30-day mark from when you first opened it, discard it. If it is still within 30 days, you can use it. Contact your doctor about the missed dose and when to take your next injection—do not try to make up a missed dose on your own.

Does Trulicity last longer if I keep it in a cooler part of the refrigerator?

No. The 30-day window applies at any temperature between 36–46°F. Colder is not better—freezing damages it. Keep it in the main refrigerator compartment where the temperature is stable.

Can I reuse a Trulicity pen if I only used it once?

Yes, as long as you use it within 30 days of the first injection. Each pen is designed for multiple doses over several weeks. Write the start date on the pen and discard it on day 31.

What should I do if my refrigerator breaks and I have an opened Trulicity pen inside?

Move the pen to a cooler or another refrigerator immediately. If the power was out for less than a few hours and the refrigerator stayed cold, the pen is likely fine. If it was warm for several hours, contact your pharmacist or doctor before using it.