There is growing evidence of efficacy of therapeutic agents in older adults and increasing use of pharmacological interventions, effective marketing strategies, and self-medication. All of these factors contribute to increasing use of medications by older people, a high prevalence of polypharmacy, and consequently a high prevalence of medication errors. In the European project AgeD in HOme Care (ADHOC), polypharmacy (defined as nine and more medications) was reported by 22% of older adults (65+) in home care in Europe. In four of eight European countries the prevalence exceeded 20% (Finland 41%, the Czech Republic 39%, Iceland 32%, and the UK 20%) [3].