Objectives: It is important for patients to make correct use of drug information (DI) to promote the proper use of medicines. Many patients use the Internet to find DI, but awareness about the websites of public institutions that provide DI is low. This study aimed to identify the actual use of the Internet for DI and associated problems to inform development of a comprehensive DI website for patients.Method: Patients with diabetes were set as a model case for patients who take medicines and need DI. A questionnaire survey was conducted among patients with diabetes who visited community pharmacies in Kagoshima City from March 2019 to October 2019. The survey covered Internet use, DI needs, methods of sourcing DI, and problems obtaining DI via the Internet.Results: There were 349 valid respondents (median age 64 years), of which 52.1% used the Internet at least once a week. Around half of the Internet users searched for DI on the Internet. More than half of these respondents chose a DI acquisition site because it “appeared at the top of search results” and was “easy to understand.” However, around half of these respondents felt that “there is too much information on the internet and I don’t know what is correct.”Conclusion: This study suggests that older patients with a long history of diabetes use the Internet to obtain DI. However, patients face various problems accessing DI via the Internet. It may be necessary to construct a comprehensive website that is easy to use and enhance public health literacy to support the proper use of medicines by patients.