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Objective: The ideal goal of any information system is to supply and deliver the information that users need. The aim of this study is to determine gastroenterology and hepatology experts' views about the current information retrieval systems and determining the characteristics of the optimal system from their point of view.

Methods: This is qualitative research that has been done phenomenologically. The study population 14 gastroenterology and hepatology experts. The data collection tool was a free interview in a non-structured way. Colaizzi's descriptive phenomenological method was used to collect data.

Results: The problems were classified into 3 categories, 15 general themes, and 31 sub-themes. The optimal information retrieval systems were classified into 4 categories, 12 general themes, and 41 sub-themes.

Conclusions: The success of information retrieval systems, especially in the field of medical sciences, depends on considering various dimensions that not paying attention to them can lead to dissatisfaction of end-users of the system and ultimately the failure of the retrieval system. Therefore, it is suggested that information retrieval system design be done by developers under the characteristics of the optimal information retrieval system by gastroenterology and hepatology experts