The standard English expression for the consequences unleashed by Pandora's opened container is “Pandora's box.”
In modern English, opening Pandora's box means starting a process that creates many unexpected problems or releases consequences that are difficult to control. The expression comes from the Greek myth in which Pandora opens a container and troubles escape into the world. It is now used both literally in discussions of the myth and figuratively in journalism, politics, science, and everyday speech.
The English wording is historically interesting because Hesiod's original container was a pithos, or large storage jar. The “box” formulation became established through later translation, especially the Latin term pyxis used by Erasmus during the Renaissance. The idiom therefore preserves a translation choice rather than the exact ancient object.
The phrase is not interchangeable with every mythological idiom. “Achilles' heel” refers to a critical weakness, “Midas touch” to a supposed ability to make things profitable, and “Gordian knot” to a seemingly insoluble problem. Pandora's box specifically suggests harmful consequences released by an action.