The server device (12) is a medication history management method in which a medication history is managed by transmitting and receiving information to and from the medical institution terminal (10) and the patient terminal (11), and random number information received from the medical institution terminal (10) The random number value information is generated based on the request, the random number information is stored in a predetermined storage unit, the random number information is displayed on the medical institution terminal (10), and the patient terminal (11). The step of receiving the input random number information and the patient identification information stored in the patient terminal (11) from the patient terminal (11), the random value information stored in a predetermined storage unit, and the patient terminal ( 11), when the random number information received from 11) matches, the medication history information corresponding to the patient identification information is read from a predetermined storage unit, and the medication history information is displayed on the medical institution terminal (10).
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