Limited sharing of information occurs between hospitals and community pharmacies regarding outpatients receiving oral chemotherapy. We therefore developed the sharing system of patient information between hospital and community pharmacies using the monitoring sheet of tegafur/gimeracil/oteracil potassium (S-1). After October 2013, community pharmacies monitored adverse events in patients receiving S-1 using the monitoring sheet, and subsequently provided this information to our hospital by fax.

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... A medical clerk entered the information into the electronic medical records, thus providing feedback to hospital physicians. In this study, we retrospectively investigated adverse events in outpatients who had received S-1 between September 2012 and October 2014. In total, sixty-seven patients were included in the study. The proportion of patients who experienced adverse events in the control group and the monitoring sheet group was 69.0% and 76.0%, respectively. The proportion of patients who developed lacrimation in the control group and the monitoring sheet group was 11.9% and 36.0%, respectively, which was statistically significant (P = 0.03). On the other hand, the proportion of patients who managed any adverse events in the control group and the monitoring sheet group was 45.2% and 68.0%, respectively. The proportion of patients who managed lacrimation in the control group and the monitoring sheet group was 11.9% and 32.0%, respectively, which was not statistically significant (P = 0.06). These results suggest that this sharing system contributed to the identification of adverse events induced by S-1, resulting in appropriate management for patients who developed these adverse events by hospital physicians and community pharmacists.