This research is focused on improving health outcomes for older people by improving the continuum of care at the critical hospital-community interface. The elderly are at particular risk of medication misadventure following hospital discharge. The smooth transition of patients across of the hospital-community interface requires the availability of quality information in a timely fashion to patients and the community-based health professionals. The principal objective of this thesis was to improve medication-related communication through the provision of a community-linked Medication Liaison Service involving hospital and community-based practitioners in the identification of at risk patients, delivery of services to those patients whilst in the hospital and immediately post-discharge in their own homes, and appropriate follow-up services.