The European population of older people with multiple chronic diseases (multimorbidity) is increasing steadily in tandem with the rising population of people aged ≥ 65 years. Older multimorbid people are at high risk of polypharmacy (PP), inappropriate prescribing (IP), adverse drug reactions (ADRs) and adverse drug events (ADEs). PP, IP, ADRs and ADEs in turn cause excessive drug costs and excess ...