Drug interactions among older adults followed up in a comprehensive medication management service at Primary Care.

OBJECTIVE: To estimate the prevalence of drug interactions and associated factors among older adults followed up in a Comprehensive Medication Management Service at Primary Care. METHODS: Firstly, the Beers criteria 2015 was used to define drug interactions; later, drug interactions proposed by Dumbreck for patients with diabetes, depression, and heart failure were evaluated. The associated factors were assessed by univariate (Pearson's χ2) and multivariate analyses (logistic regression). The significance level of 5% was set for all analyses. RESULTS: The mean age of the studied population was 70.2±7.8 years; 52.2% were between 60 and 69 years, and 61.3% were female. Among the older adults, 94.5% used two or more drugs (condition for the occurrence of drug-drug interaction). The prevalence of drug interaction according to the Beers criteria was 4.9%. After multivariate analysis, diseases of the central nervous system, arrhythmia, number of medications, and female sex were positively associated with drug interaction. The prevalence of drug interaction according to Dumbreck was 27.2%. After multivariate analysis, the number of medications, the presence of heart failure, and Charlson comorbidity index greater than 1 were conditions positively associated with drug interactions. CONCLUSION: The holistic and individualized approach used in comprehensive medication management services for older patients is important, considering the prevalence of drug interactions and the need to minimize adverse events.

Drug interactions among older adults followed up in a comprehensive medication management service at Primary Care / Interações medicamentosas entre idosos acompanhados em serviço de gerenciamento da terapia medicamentosa da Atenção Primária

ABSTRACT Objective: To estimate the prevalence of drug interactions and associated factors among older adults followed up in a Comprehensive Medication Management Service at Primary Care. Methods: Firstly, the Beers criteria 2015 was used to define drug interactions; later, drug interactions proposed by Dumbreck for patients with diabetes, depression, and heart failure were evaluated. The associated factors were assessed by univariate (Pearson's χ2) and multivariate analyses (logistic regression). The significance level of 5% was set for all analyses. Results: The mean age of the studied population was 70.2±7.8 years; 52.2% were between 60 and 69 years, and 61.3% were female. Among the older adults, 94.5% used two or more drugs (condition for the occurrence of drug-drug interaction). The prevalence of drug interaction according to the Beers criteria was 4.9%. After multivariate analysis, diseases of the central nervous system, arrhythmia, number of medications, and female sex were positively associated with drug interaction. The prevalence of drug interaction according to Dumbreck was 27.2%. After multivariate analysis, the number of medications, the presence of heart failure, and Charlson comorbidity index greater than 1 were conditions positively associated with drug interactions. Conclusion: The holistic and individualized approach used in comprehensive medication management services for older patients is important, considering the prevalence of drug interactions and the need to minimize adverse events.

RESUMO Objetivo: Estimar a prevalência de interações medicamentosas entre idosos acompanhados em um Serviço de Gerenciamento da Terapia Medicamentosa na Atenção Primária e fatores associados. Métodos: Para definir as interações medicamentosas, foi utilizado o critério de Beers de 2015 e, em um segundo momento, as interações medicamentosas propostas por Dumbreck para pacientes com diabetes, depressão e insuficiência cardíaca. A análise dos fatores associados foi realizada por análise univariada (χ2 de Pearson) e multivariada (regressão logística). Foi adotado o nível de significância de 5% para todas as análises. Resultados: A média da idade da população foi de 70,2±7,8 anos, 52,2% estavam na faixa etária de 60 a 69 anos, e 61,3% eram do sexo feminino. Dentre os idosos, 94,5% usavam dois medicamentos ou mais (condição para que ocorressem interações medicamentosas). A prevalência de interações medicamentosas dos critérios de Beers foi de 4,9%. Após análise multivariada, doença do sistema nervoso central, arritmia, número de medicamentos e sexo feminino foram positivamente associados com presença de interações medicamentosas. A prevalência das interações medicamentosas propostas por Dumbreck foi de 27,2%. Após análise multivariada, número de medicamentos, insuficiência cardíaca e índice de comorbidade de Charlson superior a 1 foram positivamente associados com presença de interações medicamentosas. Conclusão: A abordagem holística e individualizada no gerenciamento da terapia medicamentosa de pacientes idosos é importante, tendo em vista a prevalência das interações medicamentosas e a necessidade de minimizar consequentes eventos adversos.

Medicamentos potencialmente inadequados utilizados no tratamento do diabetes em idosos: uma revisão integrativa / Potentially inappropriate medications used in the diabetes treatment in older patients: an integrative review

Objetiva-se avaliar as evidências acerca do perfil de segurança para idosos dos medicamentos utili-zados no tratamento do Diabetes Mellitus tipo 2, que são considerados medicamentos potencialmen-te inadequados pelo critério de Beers e pela ferramenta STOPP: glibenclamida e clorpropamida. Realizou-se uma revisão integrativa da literatura realizada a partir da base de dados PubMed. Foram utilizados os descritores do banco Medical Subject Headings (MeSH) "chlorpropamide", "glyburide" e "sulfonylureas" combinados ao descritor "aged". Foram incluídos artigos que avaliaram o perfil de segurança do uso de clorpropamida e/ou glibenclamida por idosos. Sete artigos foram selecionados. Não foi encontrado nenhum estudo que avaliasse a clorpropamida. Dois estudos avaliaram a segu-rança cardiovascular e o risco de morte com glibenclamida, mas não foram apontadas diferenças entre o uso deste medicamento e de outros da classe das sulfonilureias. Os demais trabalhos eviden-ciaram uma associação entre o uso de glibenclamida e hipoglicemia, apesar de apresentarem resultados conflitantes quanto à relação da ocorrência deste evento com a função renal dos pacientes ido-sos. Concluí-se que a literatura aponta a necessidade de reavaliação da prescrição de glibenclamida, dada sua comprovada relação com o desenvolvimento de hipoglicemia em pacientes idosos

The aim is to evaluate scientific evidences about the safety profile among older patients of drugs used to treat type 2 Diabetes that are considered potentially inappropriate medications by the Beers criteria and STOPP: glyburide and chlorpropamide. An integrative review was performed on Pub-Med database using Medical Subject Headings (MeSH), using the descriptors: "chlorpropamide", "glyburide", "sulfonylureas" and "aged". Articles that evaluated the safety profile of chlorpropamide and/or glyburide for older patients were included. Seven articles were selected, none of which as-sessed the safety profile of chlorpropamide. Two studies evaluated the cardiovascular safety and the risk of death with glyburide, but no difference between this product and other drugs from the sul-fonylureas class was identified. The other studies showed an association between the use of gly-buride and hypoglycemia, despite showing conflicting results regarding the relationship between this event and renal function of older patients. It concludes that the scientific literature showed the needing for reassessment of glyburide prescription among older patients, given its proven relation-ship with the occurrence of hypoglycemia