A total of 137 completed questionnaires were obtained from several population samples in an attempt to assess drug knowledge, information sources, and views on drug information with particular attention to the possible role of a patient-oriented package insert. The results indicated that the study population was variably informed and could make fairly accurate assessments by this knowledge. Responders placed great importance on the doctor and pharmacist as preferred and actual drug information sources. The mass media were accorded little prominence. Great emphasis was placed on the adequate provision of information, and this appears to be a crucial function in an adequate doctor-patient relationship. The results appear to indicate a favorable climate for establishing a patient-oriented package insert that should have summarized as well as detailed information to complement the doctor and pharmacist as primary information sources.