The Department of Pharmacy Services at Ikuwakai Memorial Hospital shares drug and patient information with other medical or nursing facilities using a patient information form. This process is also used for health insurance pharmacies. However, there have been few reports on the content and utility of these forms for interinstitutional information sharing between hospital pharmacies and medical or nursing facilities. Thus, we evaluated the use of these forms for information provision in the period from October 2017 to September 2020. Forms were completed if there was a need to communicate information about a patient, such as a change in prescription during hospitalization. During the study period, 233 forms were delivered to health insurance pharmacies or medical or nursing facilities at the time of discharge. Of these forms, 131 were collected and aggregated in a questionnaire survey of the utility of the forms. Patient information forms were viewed as helpful at more than 80% in other medical or nursing facilities, which confirmed the utility of the forms at these facilities. Our findings emphasize the importance of active provision of information by hospital pharmacists to other medical or nursing facilities to support safe drug therapy.