Prevalência de uso e fontes de obtenção de medicamentos anti-hipertensivos no Brasil: análise do inquérito telefônico VIGITEL / Prevalence of use and sources of antihypertensive medicine in Brazil: an analysis of the VIGITEL telephone survey

RESUMO: Objetivo: A prevalência de hipertensão arterial no Brasil e no mundo vem aumentando nas últimas décadas, sendo o uso de medicamentos uma das estratégias utilizadas no controle da doença. O objetivo deste estudo foi estimar a prevalência de uso e identificar as fontes de obtenção de anti-hipertensivos no Brasil, segundo variáveis sociodemográficas, comparando três períodos: 2011, 2014 e 2017. Métodos: Foram utilizados dados de indivíduos com idade ≥20 anos que referiram diagnóstico médico de hipertensão arterial, entrevistados pelo Vigitel nos anos de 2011, 2014 e 2017. Foi estimada a distribuição de frequências e as prevalências de uso de medicamentos, segundo variáveis sociodemográficas, de acordo com as fontes de obtenção, com intervalos de confiança de 95%. As diferenças entre as proporções foram verificadas pelo teste χ2 de Pearson (Rao-Scott), com nível de significância de 5%. Resultados: A prevalência de uso manteve-se estável (80%). Quanto às fontes de obtenção observou-se variação no período, indicando diminuição na obtenção por meio das Unidades de Saúde do SUS (44,2% em 2011; 30,5% em 2017). Esse decréscimo esteve acompanhado do aumento na obtenção pela Farmácia Popular (16,1% em 2011; 29,9% em 2017). A prevalência de obtenção por meio de farmácias privadas/drogarias mostrou estabilidade no período. Conclusões: A prevalência de uso de medicamentos se manteve alta e houve modificação no padrão de utilização segundo fontes de obtenção, evidenciando migração entre Unidades de Saúde do SUS para a Farmácia Popular, sugerindo redução da disponibilidade dos medicamentos pelas farmácias públicas de forma universal e gratuita.

ABSTRACT: Objective: The prevalence of hypertension in Brazil and worldwide has been increasing in recent decades, and drug therapy is one of the strategies used to control this condition. The objective of this study was to estimate the prevalence of use and identify the sources for obtaining antihypertensive drugs in Brazil, according to sociodemographic variables, comparing three periods: 2011, 2014 and 2017. Methods: Data from individuals aged ≥20 years who reported a medical diagnosis of hypertension, interviewed by Vigitel in 2011, 2014 and 2017 were used. Frequency and prevalence of drug use in addition to the sources for obtaining medication were estimated by sociodemographic variables, with 95% confidence intervals. The differences between proportions were verified by Pearson's chi-square test (Rao-Scott), with a significance level of 5%. Results: The prevalence of antihypertensive drug use remained stable (80%). Regarding the sources for obtaining these medicines, there was variation in the period, indicating a decrease in usage through the Brazilian Unified Health System (SUS) (44.2% in 2011; 30.5% in 2017). This decrease was accompanied with increase in PFPB (16.1% in 2011; 29.9% in 2017). The prevalence of other sources for obtaining medicine (private pharmacies/drugstores) showed stability in the period. Conclusions: The prevalence of medication use remained high and there was a change in the pattern of use according to sources, demonstrating migration between SUS pharmacies to the PFPB, and suggesting a reduction in the availability of medicines from public pharmacies universally, and for free.

Impact of a drug dispensing model at a Community Pharmacy in Goiânia, Goiás, Brazil

Although dispensing of medication has been addressed by theoretical models, studies that confirm the impact of this service are still needed. The objective was to evaluate the impact of a new model of medicine dispensing system on patients' medication knowledge, adherence to treatment and satisfaction. One hundred and four patients attending the dispensing service of a community pharmacy between 21 January 2013 and 20 April 2013 were included in this intervention study. The impact of the service on patients' medication knowledge, adherence to treatment and satisfaction was assessed by using validated questionnaires at two time points: at the moment of medication dispensing and 30 days thereafter by telephone contact. Statistical analysis was performed by McNemar's test, and a p<0.05 was set as statistically significant. The number of patients showing insufficient knowledge about medications decreased by 50% (p < 0.05), and the number of those showing sufficient knowledge was three times greater (p < 0.05) after medicine dispensing. A high level of satisfaction was observed. Improvement of medication adherence, however, was not observed. The proposed system model for drug dispensing improved patients' knowledge about medication and satisfaction