PROBLEM TO BE SOLVED : To more accurately evaluate the relationship between administration of a medicine and its administration effect for each medicine and for each patient.SOLUTION : According to an embodiment, a hospital information system includes a generation unit. The generation unit generates image data relating to an image in which an identifier representing the administration timing of a medicine, an area representing a temporal change of the administration effect of the medicine, and an area representing a temporal change of the condition of a patient to whom the medicine has been administered are displayed in a common time sequence.SELECTED DRAWING : Figure 1COPYRIGHT : (C)2019, JPO&INPIT