Cimzia prefilled syringes can stay out of the fridge for up to 7 days at room temperature, as long as the temperature stays at or below 77°F (25°C). The powdered vial form gets a much longer window of up to 6 months. Either way, you need to keep the medication in its original carton to protect it from light, and once it’s been at room temperature, the clock is ticking.
Prefilled Syringes: Up to 7 Days
The U.S. prescribing information for Cimzia prefilled syringes allows a single period of up to 7 days at room temperature, defined as no warmer than 77°F (25°C). You should write the date you removed the syringe from the fridge on the carton so you can track the window. If you haven’t used it within those 7 days, discard it.
Outside the U.S., some regulatory sources list a 10-day window at the same temperature range (up to 25°C). This reflects differences in how regional drug agencies evaluate stability data. If you’re in Australia or the UK, your product leaflet may say 10 days. If you’re in the U.S., follow the 7-day guidance on your carton.
Powdered Vials: Up to 6 Months
If you use the older lyophilized (freeze-dried) powder form of Cimzia rather than the prefilled syringe, the room temperature window is dramatically longer. Unopened vials can be stored at up to 77°F (25°C) for up to 6 months, though they can’t exceed the original expiration date printed on the packaging. Once you move the vials out of the fridge, write the new 6-month expiration date on the carton and don’t put them back in the refrigerator.
Why You Can’t Put It Back in the Fridge
The standard rule across all Cimzia forms is straightforward: once it’s been stored at room temperature, don’t return it to the refrigerator. Temperature cycling, where a biologic drug warms up and cools down repeatedly, can degrade the protein in the medication and reduce its effectiveness. Cimzia’s stability testing was done for a single, one-way temperature excursion, not for going back and forth.
There is one narrow exception worth knowing about. The UK’s Specialist Pharmacy Service, citing direct communication with the manufacturer, notes that a single excursion of up to 10 days between 8°C and 25°C may allow the product to be returned to the fridge and used within its original expiry date. However, this falls outside the official product license, and the medication must be discarded if it has been through more than one such excursion. For most people, the safest approach is to treat any room-temperature period as final and use or discard the syringe within the allowed window.
Keep It in the Carton
Cimzia is sensitive to light. Whether stored in the fridge or temporarily at room temperature, prefilled syringes should remain in their original carton until you’re ready to inject. This isn’t just a suggestion on the label. Light exposure can break down biologic medications over time, potentially making your dose less effective. If your syringe has been sitting out of the carton under a lamp or near a window, that’s a concern worth noting even if the temperature was fine.
What Counts as Room Temperature
The 77°F (25°C) ceiling is firm. A climate-controlled home in most seasons will stay within range, but a hot car, a sunny countertop, or a bag left in direct sunlight during summer can easily exceed that threshold. If you’re traveling, a simple insulated pouch without ice packs can help buffer against temperature spikes, but avoid freezing the medication. Cimzia should never be frozen.
If you suspect your syringe got warmer than 77°F at any point during its time out of the fridge, don’t use it. There’s no visual way to tell whether the protein inside has degraded, so the safe move is to discard it and use a fresh syringe.
Traveling With Cimzia
For short trips of a week or less, you can simply carry your prefilled syringes at room temperature in their original carton. This is the easiest option when flying, since you avoid dealing with ice packs and TSA questions about gel packs (though those are generally allowed for medical use).
For longer trips, you’ll want to keep Cimzia refrigerated with a portable cooler or insulated travel case. The key is avoiding direct contact between the syringe and any ice or frozen gel packs, which could freeze the medication. A layer of fabric or a small towel between the pack and the carton works well. If your hotel has a mini-fridge, store the carton there upon arrival and note whether it’s been more than 7 days since the syringes were last refrigerated. If it has, those syringes are past their room-temperature window and should not be returned to cold storage for continued use.
Letting the Syringe Warm Before Injection
Regardless of storage, you should let a refrigerated Cimzia syringe reach room temperature before injecting. This typically takes about 30 minutes on the counter. Injecting cold medication is more likely to sting or cause discomfort at the injection site. This brief warm-up period is separate from the 7-day storage window. Pulling a syringe out for 30 minutes and then putting it back in the fridge if you change your mind is a different situation from leaving it at room temperature for days.