**5.2 Role of patients/caregivers**

Elderly patients or their caregivers play an equal role in reducing the incidence of ADR. In a study of 30,000 Medicare enrollees aged over 65 years followed for a 12-month period, 99 adverse drug events (23.5% of all adverse drug events) and 30 potential adverse drug events (13.6% of potential adverse drug events) were attributed to patient error [23]. Errors in medication administration, adherence to the treatment regimen, and modification of medication schedules are commonly encountered patient errors.
