Objective: We surveyed community pharmacists and hospital pharmacists on the usefulness of electronic package inserts since they replaced paper-based package insert information for prescription drugs.Methods: We conducted a questionnaire survey with 1,258 community pharmacists and 126 hospital pharmacists on how they search for package insert information, handle data revisions, use paper or electronic media, and their opinions on work efficiency.Results: Questionnaire responses were obtained from 178 community pharmacists (response rate: 14.1%) and 82 hospital pharmacists (response rate: 65.1%). Among respondents, 98.9% and 98.8% of community and hospital pharmacists used personal computers connected to the internet, and 30.9% and 56.1% of community and hospital pharmacists used personal digital assistants. As for package insert medium, 79.2% and 61.8% of community pharmacists used paper and electronic media for package inserts while 50.0% and 98.8% of hospital pharmacists used paper and electronic media. To nine of ten questions about work efficiency, more than half of the hospital pharmacists reported that efficiency increased with electronic package inserts. More than half of community and hospital pharmacists reported that revision made to electronic data were more quickly reflected in practice.Conclusion: The survey revealed that community pharmacists prefer paper-based package inserts, while hospital pharmacists prefer electronic package inserts to check package insert information. The results also showed that using electronic package inserts was perceived to improve work efficiency. Furthermore, personal digital assistants will become important in promoting electronic package inserts.