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.

Brazilian generics market change after Farmácia Popular program

ABSTRACT OBJECTIVE To evaluate trends in the use of generic and non-generic medicines to treat hypertension and diabetes under the Farmácia Popular Program (FP) and its impact on generic medicines sales volume and market share in the Brazilian pharmaceutical market. METHODS This longitudinal, retrospective study used interrupted time series design to analyze changes in monthly sales volume and proportion of medicines sales (market share) for oral antidiabetic and antihypertensive medicines for generic versus non-generic products. Analyses were conducted in a combined dataset that aggregate monthly sales volumes from the Farmácia Popular program and from the QuintilesIMS™ (IQVIA) national market sales data from January 2007 to December 2012. The Farmácia Popular program phases analyzed included: a) 2009 reductions in medicines reference prices (AFP-II) and b) 2011 implementation of free medicines program for hypertension and diabetes, the Saúde não tem preço (SNTP - Health has no price). RESULTS Patterns of use for FP-covered antidiabetic and antihypertensive medicines were similar to their use in the market in general. After one year of the decreases in government subsidies in April 2010, market share of antidiabetic and antihypertensive medicines experienced relative declines of -54.5% and -59.9%, respectively. However, when FP-covered medicines were made free to patients, overall market volume for antidiabetic and antihypertensive generics increased dramatically, with 242.6% and 277.0% relative increases by February 2012, as well as non-generics with relative increase of 209.7% and 279% for antidiabetic and antihypertensive medicines, respectively. CONCLUSIONS Ministry of Health policies on the amount of patient cost sharing and on the choice of medicines on coverage lists have substantial impacts on overall generic sales volume in retail pharmacies.

User satisfaction with pharmacy services in the Brazilian National STD/AIDS Program: validity and reliability issues / Satisfação de usuários do Programa Nacional de DST/AIDS com a dispensação de medicamentos: aspectos de validade e confiabilidade

The objective of this study is to evaluate the psychometric properties of a user satisfaction scale regarding the Brazilian National STD/AIDS Program, specifically related to dispensing AIDS medicines. The scale was developed and applied in a study covering 10 Brazilian States that evaluated the quality of medicine dispensing. The questionnaire was answered by 1,412 people living with HIV and undergoing antiretroviral therapy. Construct validation involved two stages of factor analysis. The item-total correlation matrix was analyzed, and tests for associations between the target variable, socio-demographic variables, and related constructs were performed. Reliability was studied by means of the sub-scales' internal consistency, estimated by Cronbach's alpha. Five relevant satisfaction dimensions were identified. A moderate level of internal consistency was found for these dimensions, suggesting they were adequate. The results of the association tests agreed with other studies reported in the literature. We conclude that the instrument is appropriate for application in similar populations with adequate psychometric characteristics and serves to measure users' assessments of the pharmaceutical services received and helps to orient improvements in such services.

O objetivo do presente artigo é avaliar propriedades psicométricas de uma escala de satisfação de usuários do Programa Nacional de DST/AIDS com a dispensação de medicamentos. A escala foi desenvolvida e aplicada num estudo abrangendo dez estados brasileiros para avaliar a qualidade da dispensação de medicamentos. O questionário foi respondido por 1.412 pessoas vivendo com HIV em tratamento com anti-retrovirais. Para validação de constructo, foram realizadas duas etapas de análise fatorial. A matriz de correlação item-escala corrigida foi analisada; testes de associação entre a variável de interesse, variáveis sócio-demográficas e constructos relacionados foram realizados. A confiabilidade foi estudada por meio da consistência interna das subescalas, estimada pelo alpha de Cronbach. Cinco dimensões da satisfação foram identificadas. Encontrou-se consistência interna moderada para essas dimensões, sugerindo adequações. Houve concordância entre os resultados dos testes de associação realizados e os achados de outros estudos descritos na literatura. O instrumento mostrou-se apropriado para ser aplicado em populações semelhantes, servindo para aferir a avaliação dos usuários sobre os serviços recebidos e assim orientar melhorias nos serviços avaliados.