Provided is a packaged medicine capable of preventing electrode degradation over a long period of time, and reliably emitting a signal once ingested, even if a long time passes from production to ingestion. The packaged medicine is provided with: a solid formulation which includes medicine powder and a micro device； a container having a solid formulation-accommodating space and accommodating the solid formulation in the solid formulation-accommodating space； and an inert gas which fills the solid formulation-accommodating space. The micro device is provided with: two electrodes having different ionization tendencies； and an emission part which emits a signal using electromotive force that is generated when the electrodes are in contact with an electrolyte.
