BACKGROUND AND PURPOSE: Many patients are inadequately informed about their drug therapy. There is thus a need for providing additional drug information to patients. The authors here report on a 6-year experience with a drug information service for patients. PATIENTS AND METHODS: The information service was available by telephone, e-mail or regular mail and was addressed initially to patients in Saxony and since 2005 to patients throughout Germany. Demographic and drug therapy data of the patients were registered and analyzed using a relational database. All enquiries to the information service between August 2001 and January 2007 were evaluated. RESULTS: 5,587 enquiries were registered. 61.4% of the persons calling were female and 33.8% male (sex was unknown in 4.8% by anonymous calls). The most frequent reasons for an enquiry were a general need for information about drugs and therapy (27.5%) and adverse drug reactions (24.7%). The drug group most frequently enquired about were cardiovascular drugs, accounting for 34.4%, followed by neuropsychiatric drugs (15.1%). CONCLUSION: The results of this analysis show an evident need for a drug information service for patients. This need is possibly caused by the shortage of time that physicians can devote to patients. An independent and competent drug information service may improve the quality of medical care and the satisfaction of the patients involved.