Prevalence of Potentially Inappropriate Medications in Drug Dispensing Data of Older Adults Living in Northwest Italy.

The increasing use of multiple medications among older adults raises concerns about potentially inappropriate medications (PIMs), which are associated with adverse health outcomes and increased healthcare costs. This study aimed to assess the prevalence and types of PIMs dispensed to older adults living in Northwest Italy using real-world pharmacy claims data. An observational, retrospective analysis was conducted on anonymized drug dispensing datasets from two local health authorities, covering individuals aged 65 years or older between 2018 and 2021. PIMs were identified according to the 2019 American Geriatrics Society Beers Criteria, focusing on drugs that are inappropriate or should be used with caution in older adults or have anticholinergic properties. Over half of older adults who received medications during the study period were dispensed at least one PIM, with stable or slight increased prevalence over time with no differences by sex or region. Proton-pump inhibitors used for more than 8 weeks and paroxetine were the most common PIMs, while furosemide and sulfonylureas were also frequently reported PIMs. These findings indicate a persistently high burden of inappropriate prescribing in older adults and highlight the need for coordinated deprescribing interventions and prescriber education to promote safer, evidence-based pharmacotherapy in aging populations.