The purpose of the present invention is to provide a medical drug verification device, a medical drug verification method, and a medical drug verification system, which enable improving robustness in matching information on medical drugs. The medical drug verification device according to a first embodiment of the present invention is provided with: an exterior information acquisition unit which acquires exterior information of a medical drug; a matching unit which performs matching between verification target information based on the acquired exterior information and a standard information group, regarding medical drugs, stored in a memory; a display control unit which, on the basis of a degree of matching, causes a display device to display multiple candidates of standard information about a medical drug corresponding to the exterior information contained in the standard information group; a reception unit which receives a selection of standard information included in the multiple candidates; a reflection unit which causes the verification target information and/or exterior information corresponding to the selected standard information to be reflected in the stored standard information group, wherein the reflection unit performs reflection in the case when the degree of matching with regard to the selected standard information fails to fulfill a predetermined standard.
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