Storage of Diluted Solution: The product does not contain a preservative.
Store the diluted solution from the KEYTRUDA 100 mg/4 mL vial either: At room temperature for no more than 6 hours from the time of dilution. This includes room temperature storage of the diluted solution, and the duration of infusion.
Under refrigeration at 2°C to 8°C (36°F to 46°F) for no more than 24 hours from the time of dilution. If refrigerated, allow the diluted solution to come to room temperature prior to administration. Do not shake.
Discard after 6 hours at room temperature or after 24 hours under refrigeration.
Do not freeze.