Can you drink expired prune juice?
Properly stored, unopened prune juice that has been sold unrefrigerated will generally stay at best quality for about 18 to 24 months after the date on the package when stored at room temperature, although it will usually remain safe to drink after that.
Do I have to refrigerate prune juice after opening?
Store prune juice in a cool, dark place. Once opened, prune juice should be refrigerated and consumed within a few days. To avoid oxidation, store prune juice in an airtight container.