Outpatient cancer chemotherapy is becoming increasingly widely adopted. It is, therefore, essential to strengthen the collaboration between hospital and community pharmacists. Although there have been several reports on the collaboration between these two health care providers in the provision of outpatient cancer chemotherapy, there have been no reports on the usefulness of the tools provided by hospital pharmacists to their community counterparts. Hence, this study examined the usefulness of the Adverse Drug Reaction Information Form, which was provided to insurance pharmacies. The response rate of community pharmacists to the information provided was 80%. The most common content of the information provided was related to supportive care(55.9%). Telephone consultations between community pharmacists and patients were conducted in 20 cases(34.8%)to confirm the symptoms of adverse drug reactions. The telephone follow-up rate for each grade of adverse drug reaction was 34.8% for grade 1 and 45.5% for Grade 2, with the number of Grade 2 adverse drug reaction cases being the highest. These findings demonstrate that collaboration between hospital and community pharmacists using the Adverse Drug Reaction Information Form can help provide high-quality outpatient cancer care.