PROBLEM TO BE SOLVED: To efficiently grasp information necessary for a prescription audit for a prescription prescribed to a patient.SOLUTION: A residual medicine confirmation device is a device for supporting a medicine providing job when a pharmacist performs the medicine providing job to a patient. The residual medicine confirmation device includes: estimated residual medicine amount calculation means that calculates an estimated residual medicine amount for estimating a residual medicine amount of medicine excessively taken by the patient on the basis of a theoretical residual medicine amount which is the residual medicine amount in a case where the patient properly took the medicine; and residual medicine confirmation display means that displays a display based on the estimated residual medicine amount on a display part.
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