AUTHOR=Burato Sofia , Leonardi Luca , Antonazzo Ippazio Cosimo , Raschi Emanuel , Ajolfi Chiara , Baraghini Manuela , Chiarello Antonella , Delmonte Valentina , Di Castri Lucio , Donati Monia , Fadda Antonella , Fedele Daniela , Ferretti Alessandra , Gabrielli Laura , Gobbi Silvia , Lughi Sereno , Mazzari Martina , Pieraccini Fabio , Renzetti Alessandro , Russi Elsa , Scanelli Chiara , Zanetti Barbara , Poluzzi Elisabetta
TITLE=Comparing the Prevalence of Polypharmacy and Potential Drug-Drug Interactions in Nursing Homes and in the Community Dwelling Elderly of Emilia Romagna Region
JOURNAL=Frontiers in Pharmacology
VOLUME=11
YEAR=2021
URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2020.624888
DOI=10.3389/fphar.2020.624888
ISSN=1663-9812
ABSTRACT=Backround: We aimed at assessing the prevalence of polypharmacy and potential drug-drug interactions (DDIs) with clinical relevance in elderly patient on Emilia Romagna area. Both outpatients and residents in nursing homes were assessed, with only partially overlapping strategies.
Methods: We defined a list of 190 pairs of potentially interacting drugs, based on literature appraisal and availability of therapeutic alternatives. January-June 2018 data on drug use in patients over 65 years-old were collected from nine Local Health Authorities of Emilia Romagna: data on community-dwelling subjects were extracted from archives of reimbursed prescriptions, while drug use in a sample of nursing homes was recorded from clinical charts in one index day within the same semester. The frequency of polypharmacy (at least five or at least 10 concurrent drugs) and of each DDI was calculated.
Results: In line with different rates of polypharmacy (80% vs 16%), the risk of exposure to at least one interaction was 53.7% in nursing homes and 26.4% in outpatients. Among DDIs, in nursing homes antidepressants—anxiolytics (11.9%) ranked first, followed by antidepressants—aspirin (7.4%). In outpatients, ACE-inhibitors—non-steroidal anti-inflammatory drugs (NSAIDs) reached 7.2% followed by the calcium channel blockers—α-blockers (2.4%).
Discussion: Polypharmacy and risk of DDIs appeared very different in the two settings, due to both technical and clinical reasons. In order to reduce use of benzodiazepines, NSAIDs, antidepressants and relevant DDIs, 1) defining alternative options for pain relief in elderly outpatients, and 2) implementing non-pharmacological management of insomnia and anxiety in nursing homes should be prioritized.