How long can kesimpta be out of the fridge?

How long can Kesimpta (ofatumumab) be left out at room temperature?

Kesimpta should be stored in a refrigerator before use. Once a dose has been removed from refrigeration, the product can generally be kept at room temperature for a limited window before it must be returned to the refrigerator or discarded, depending on the specific dosing instructions in the prescribing information.

Because the exact allowable “out of fridge” time depends on the product presentation and the specific instructions for room-temperature handling, the safest answer is to follow the storage section in the Kesimpta package insert for your exact formulation (prefilled pen vs. syringe) and your current country/label version.

If you share whether you’re using the prefilled pen or the syringe (and your label/country), I can help interpret the precise time limit from the correct instructions.

What happens if it’s out longer than the allowed time?

If Kesimpta is kept out longer than the room-temperature time allowed by the label, it should not be used. In that case, the usual guidance is to discard it and contact your pharmacist for advice on the next dose timing.

Can you put it back in the fridge after warming up?

Kesimpta handling rules depend on the label’s room-temperature window and whether the medication has exceeded that limit. The prescribing information is the authority here, because some injectable biologics allow a short room-temperature period but require disposal if that time is exceeded.

Quick check: which product do you have?

Reply with:
- prefilled pen or prefilled syringe
- the country/label (or a photo/text of the “Storage” section)

…and I’ll tell you the exact maximum time it can be out of the refrigerator according to the correct Kesimpta instructions.