The purpose is to study if different factors influence medicine adherence in elderly people. In this study number of generic substitution and use of non-prescription drugs, herbal medicine and dietary supplement is in focus.

The purpose of this study is to describe in the elderly:

1. Association between medicine adherence and number of generic substitution
2. Association between medicine adherence and use of non-prescription drugs, herbal medicine and dietary supplements and interaction between 'prescription drugs' and 'non-prescription drugs, herbal medicine and dietary supplements'
3. Intentional and unintentional non-adherence

Some of the data in the present study were originally collected as part of a major research project 'Methods for Improving Compliance with Medicine Intake' (MICMI). The study sample of 945 persons was randomly selected into three groups: two intervention groups and one control group. Interventions were pharmaceutical care and an electronic reminder system. All groups were followed for one year.

Data in the present study is from the pharmaceutical care group and the control group, and is descriptive.

Inclusion Criteria:

• Aged 65 years or older
• Living in their own homes
• Without assistance to medicine administration
• Living in the Municipality of Aarhus, Denmark
• Long-term treatment with > 4 prescription drugs

Exclusion Criteria:

Persons aged 65 years or older, living in their own homes without assistance to medicine administration in the Municipality of Aarhus, Denmark and who were in long-term treatment with > 4 prescription drugs at the beginning of the project