Appropriate knowledge of the indications for medications in use among older individuals assisted in the Jornada Científica dos Acadêmicos de Farmácia-Bioquímica

This study aimed to identify variables associated with the appropriate recall of indications and the drug classes that represented the most unmatching medications (i.e., when the individual who used it had not reported any illness that matched its indications). Community-dwelling individuals aged ≥60 years using ≥1 medication, from Santa Cruz da Esperança-SP, Brazil, were home-interviewed. Logistic regression models were used to evaluate the association between the appropriate recall of the indications for all medications in use and the following: gender, age, education, individual income, living arrangement, self-perceived health, and medication number, administration, payment, and identification. Medications whose indications were inappropriately recalled were classified as matching or unmatching. One hundred seventeen individuals used an average of 5.1 (standard deviation, 3.3) medications. Sixty-one (52.1%) appropriately recalled all indications. The appropriate recall of all indications was negatively associated with the number of medications in use (e.g., individuals taking 5-6 medications were 25 times less likely to appropriately recall all indications than those taking 1-2). Antithrombotic, acid-related disorder and psychoanaleptic classes showed greater frequencies of unmatching than matching medications. Therefore, counseling the elderly about drug indications should focus on those using ≥3 medications and/or antithrombotic, acid-related disorder, and psychoanaleptic agents.

Use of drugs for gastrointestinal disorders: evidence from National Survey on Access, Use and Promotion of Rational Use of Medicines / Utilização de medicamentos para distúrbios gastrintestinais: evidências da Pesquisa Nacional sobre Acesso, Utilização e Promoção do Uso Racional de Medicamentos

ABSTRACT Objective To estimate the prevalence of use of drugs to treat gastrointestinal disorders, according to demographic, socioeconomic, and health characteristics of the Brazilian population. Methods This is a population-based survey that interviewed individuals residing in cities of the five regions in Brazil. The study sample was composed of 32,348 individuals aged 20 or more years. The profile of use of drugs for gastrointestinal disorders was evaluated considering the variables sex, age, healthcare plan, region, and number of chronic diseases. We also analyzed the frequency of individuals who declared using other drugs, besides those already employed for treatment of gastrointestinal disorders. Additionally, the estimated frequencies of the drug classes used were determined. Results The prevalence of use of drugs for gastrointestinal disorders in Brazil was 6.9% (95% confidence interval − 6.4-7.6), higher in females, among persons aged over 60 years, in those who had a private healthcare insurance, and presented with two or more chronic diseases. It was noted that 42.9% of the aged who used drugs for gastrointestinal disorders were also on polypharmacy. As to the classes of drugs, 82% corresponded to drugs for the food tract and metabolism, particularly proton pumps inhibitors. Conclusion The use of drugs for treatment of gastrointestinal disorders was significant among women and elderly. In this age group, consumption may be linked to gastric protection due to polypharmacy. This study is an unprecedented opportunity to observe the self-reported consumption profile of these drugs in Brazil and, therefore, could subsidize strategies to promote their rational use.

RESUMO Objetivo Estimar a prevalência de utilização de medicamentos para o tratamento de distúrbios gastrintestinais, segundo características demográficas, socioeconômicas e de saúde da população brasileira. Métodos Trata-se de inquérito de base populacional, que entrevistou indivíduos residentes em municípios das cinco regiões do Brasil. A amostra deste estudo foi composta por 32.348 indivíduos de 20 anos ou mais de idade. Foi avaliado o perfil de utilização de medicamentos para distúrbios gastrintestinais entre as variáveis sexo, idade, plano de saúde, região e número de doenças crônicas. Analisou-se a frequência de indivíduos que declararam utilizar outros medicamentos, além daqueles já utilizados para tratamento de distúrbios gastrintestinais. Além disso, foram estimadas as frequências das classes medicamentosas utilizadas. Resultados A prevalência de utilização de medicamentos para distúrbios gastrintestinais no Brasil foi de 6,9% (intervalo de confiança de 95% − 6,4-7,6), sendo maior no sexo feminino, entre pessoas acima de 60 anos de idade, naqueles que possuíam plano privado de saúde e tinham duas ou mais doenças crônicas. Observou-se que 42,9% dos idosos que utilizaram medicamentos para distúrbios gastrintestinais também eram polimedicados. Em relação às classes medicamentosas, 82% correspondiam a medicamentos para o trato alimentar e metabolismo, destacando os inibidores da bomba de prótons. Conclusão A utilização de medicamentos para tratamento de distúrbios gastrintestinais foi significativa entre mulheres e idosos. Nesta faixa etária, o consumo pode estar vinculado à proteção gástrica causada por polimedicação. Este estudo representa oportunidade inédita para observar o perfil de consumo autorreferido desses medicamentos no Brasil e pode, portanto, subsidiar estratégias para promoção de seu uso racional.

Fatores relacionados à adesão ao tratamento farmacológico por idosos na Atenção Primária à Saúde / Factors related to adhesion to pharmacological treatment by seniors in Primary Health Care

Objective: To identify factors related to adherence to pharmacological treatment by the elderly people in Primary Health Care.Method: It is a descriptive study developed with a team of the Family Health Strategy, in a municipality in northwestern Paraná. Data were collected in June and July 2018, through a questionnaire applied at home visit. Subsequently, the data were recorded, organized in spreadsheets and submitted to descriptive statistics.Results: Among the 118 elderly participants, 61.1% were female, 78.8% were between 60 and 69 years old, 59.3% had up to eight years of schooling, 12.2% had some physical disability, 9, 7% needed help to use medication, 60.1% were taking medication as prescribed, 12.1% had already used medication changed, 39.8% used 1 to 3 medications prescribed by the doctor, 50% reported Self-medication, 84.7% reported knowledge of the indication of all medications, 5.1% indicated that the greatest difficulty in adhering to treatment is that the medication is not provided free of charge. Conclusion: Given the factors highlighted by the participants as influential in adherence to drug treatment, it is necessary that professionals and managers jointly establish strategies to facilitate access to the necessary drugs for seniors.

Objetivo: identificar os fatores relacionados à adesão ao tratamento farmacológico por idosos na Atenção Primária à Saúde. Método: Estudo descritivo desenvolvido junto a uma equipe da Estratégia Saúde da Família, em um município do noroeste do Paraná. Os dados foram coletados nos meses de junho e julho de 2018, por meio de questionário aplicado no momento da visita domiciliar. Posteriormente, os dados foram registrados, organizados em planilhas e submetidos à estatística descritiva. Resultados: Dentre os 118 idosos participantes, 61,1% eram do sexo feminino, 78,8% tinham entre 60 e 69 anos, 59,3% possuíam até oito anos de estudo, 12,2% apresentavam alguma deficiência física, 9,7% necessitavam de auxílio para utilizar medicamentos, 60,1% faziam uso da medicação conforme prescrição médica, 12,1% já fez uso de medicamento trocado, 39,8%, utilizavam de 1 a 3 medicamentos prescritos pelo médico, 50% relataram automedicação, 84,7% relataram conhecimento da indicação de todos os medicamentos, 5,1% indicaram que a maior dificuldade para aderir ao tratamento é o medicamento não ser fornecido gratuitamente. Conclusão: Diante dos fatores destacados pelos participantes como influentes na adesão ao tratamento medicamentoso, torna-se necessário que profissionais e gestores estabeleçam conjuntamente estratégias para facilitar o acesso aos medicamentos necessários para os idosos.

Interventions to reduce the prescription of inappropriate medicines in older patients / Intervenções para reduzir a prescrição de medicamentos inapropriados para idosos

ABSTRACT OBJECTIVE: Identify and critically evaluate systematic reviews addressing the effectiveness of interventions to reduce the number of prescriptions of potentially inappropriate medication to older patients. METHODS: This is an overview of systematic reviews. The studies were searched and selected from Medline, Cochrane Library, Embase, CINAHL, Virtual Health Library, and Web of Science databases, combining the terms aged, prescriptions, inappropriate prescribing and potentially inappropriate medication list with their entry terms and other related descriptors, published by June 2017. This study included systematic reviews with or without meta-analysis that addressed the effectiveness of any intervention or combined interventions to reduce the number of prescriptions of potentially inappropriate medications to older patients, without restriction in terms of design, language or date of publication of primary studies. AMSTAR - A MeaSurement Tool to Assess systematic Reviews - was used to evaluate the methodological quality of selected systematic reviews. Study selection and the methodological quality evaluation were performed by two independent evaluators, who resolved any divergence by consensus. The main findings were grouped into thematic categories, defined after a content analysis and discussed qualitatively as narrative synthesis. RESULTS: This study analyzed 24 systematic reviews. In terms of study design and methodological quality evaluation, most were systematic reviews of randomized controlled clinical trials and studies of moderate quality, respectively. The interventions were analyzed in five thematic categories: medication review services, pharmaceutical interventions, computerized systems, educational interventions, and others. The interventions analyzed showed good results and most of them helped reduce the number of prescriptions of potentially inappropriate medication to older patients. CONCLUSIONS: The systematic reviews included in this overview showed potential benefits of different interventions. However, it was not possible to determine the most effective intervention. Combined interventions are likely to provide better results than isolated interventions.

RESUMO OBJETIVO: Identificar e avaliar criticamente revisões sistemáticas sobre a efetividade de intervenções para reduzir a prescrição de medicamentos potencialmente inapropriados para pacientes idosos. MÉTODOS: Overview de revisões sistemáticas. A busca e a seleção dos estudos foram feitas nas bases de dados Medline, Biblioteca Cochrane, Embase, CINAHL, Biblioteca Virtual em Saúde e Web of Science, combinando os termos aged, prescriptions, inappropriate prescribing e potentially inappropriate medication list com seus sinônimos remissivos e outros descritores associados até junho de 2017. Foram incluídas revisões sistemáticas com ou sem metanálise, que tenham abordado a efetividade de qualquer intervenção ou a combinação de intervenções para reduzir a prescrição de medicamentos potencialmente inapropriados para pacientes idosos, sem restrição quanto ao desenho dos estudos primários, idioma ou data de publicação. Para avaliação da qualidade metodológica das revisões sistemáticas selecionadas, foi utilizado o instrumento A MeaSurement Tool to Assess systematic Reviews. A seleção e a avaliação da qualidade metodológica foram realizadas por dois avaliadores independentes. As divergências foram superadas por consenso. Os principais achados foram agrupados em categorias temáticas, definidas com base em análise de conteúdo e discutidas qualitativamente na forma de síntese narrativa. RESULTADOS: Vinte e quatro revisões sistemáticas foram incluídas no estudo. Quanto ao desenho do estudo e à avaliação da qualidade metodológica, prevaleceram revisões sistemáticas de ensaios clínicos controlados randomizados e estudos de qualidade moderada, respectivamente. As intervenções foram analisadas em cinco categorias temáticas: serviços de revisão de medicamentos, intervenções farmacêuticas, sistemas informatizados, intervenções educacionais e outras. As intervenções estudadas apresentaram bons resultados e a maioria contribuiu para reduzir a prescrição de medicamentos inapropriados para pacientes idosos. CONCLUSÕES: As revisões sistemáticas incluídas nesse overview apontaram benefícios potenciais de diferentes intervenções. No entanto, não foi possível determinar qual a mais efetiva. É provável que intervenções multifacetadas alcancem resultados melhores do que intervenções isoladas.

Alarming lack of knowledge about antithrombotic therapy among patients with atrial fibrillation / Terapia antitrombótica: alarmante falta de conhecimento em pacientes com fibrilação atrial

ABSTRACT Large population campaigns have been conducted in Brazil to improve knowledge about the signs and symptoms of stroke and the importance of time to care. Objective: Parallel to these important actions, we aimed to evaluate the lay knowledge of patients with atrial fibrillation, a well-recognized etiology of stroke, adequate treatment and management of which can prevent up to 30% of cerebrovascular events. Methods: We questioned 143 patients with atrial fibrillation about the risks associated with the disease. Results: Ninety-one percent were on anticoagulation treatment. Of the total, 63.6% reported having been informed about the risks and benefits of anticoagulants but only 46.9% were able to correctly mention one of these risks. Ischemic stroke was identified as a risk by only 25.9% and hemorrhagic stroke was not mentioned. A CHADS2 ≥ 2 was scored by 84.0% of the patients. Conclusions: Our study showed an alarming knowledge gap in patients with atrial fibrillation. Difficulty in adherence to treatment resulting from the failure of this communication is possibly one of the factors responsible for the high incidence and recurrence of stroke, and should not go unnoticed.

RESUMO Campanhas populacionais para melhorar o conhecimento sobre os sinais e sintomas do acidente vascular encefálico e a importância do tempo para o tratamento têm sido realizadas no nosso país, visando a melhoria da linha do atendimento. Objetivo: Paralelamente a estas relevantes ações, objetivamos avaliar o conhecimento leigo de pacientes portadores de fibrilação atrial, etiologia determinada e prevalente do acidente vascular encefálico, cujo tratamento e manejo adequado podem prevenir até 30% dos eventos cerebrovasculares. Métodos: Entrevistamos portadores de fibrilação atrial sobre os riscos associados à doença. Resultados: Noventa e um por cento estavam sob uso de anticoagulantes. Do total, 63,6% responderam terem sido informados sobre riscos e benefícios da terapia anticoagulante, mas apenas 46,9% souberam citar corretamente um desses riscos. Acidente vascular encefálico isquêmico foi associado ao risco por apenas 25,9% e acidente vascular encefálico hemorrágico não foi mencionado. CHADS2 ≥ 2 foi pontuado por 84,0% dos pacientes. Conclusões: Nosso estudo demonstra uma alarmante falha no conhecimento do risco de acidente vascular encefálico nos portadores de fibrilação atrial. Dificuldade na aderência ao tratamento resultante da falha dessa comunicação é fator relevante na incidência e recorrência do acidente vascular encefálico e não deve ser negligenciado.

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

Adaptação Transcultural do Oral Anticoagulation Knowledge Test para o Português do Brasil / Cross-cultural Adaptation of the Oral Anticoagulation Knowledge Test to the Brazilian Portuguese

Resumo O conhecimento dos pacientes sobre o tratamento com anticoagulantes orais pode favorecer o alcance dos resultados terapêuticos e a prevenção de eventos adversos relacionados à farmacoterapia. No Brasil, observa-se a ausência de instrumentos validados para avaliação do conhecimento do paciente sobre o tratamento com a varfarina. O objetivo deste estudo foi realizar a adaptação transcultural do instrumento Oral Anticoagulation Knowledge (OAK) Test do inglês para o português do Brasil. Trata-se de estudo metodológico desenvolvido em uma clínica de anticoagulação de um hospital público universitário. O estudo compreendeu as etapas de tradução inicial, síntese das traduções, retrotradução, revisão pelo comitê de especialistas e pré-teste com 30 indivíduos. A equivalência semântica foi obtida através da análise do significado referencial e geral de cada item. A equivalência conceitual dos itens buscou demonstrar a relevância e a aceitabilidade do instrumento. Com o processo de adaptação transcultural foi obtida a versão final do OAK Test em língua portuguesa do Brasil, intitulada “Teste de Conhecimento sobre Anticoagulação Oral”. Constatou-se uma equivalência semântica e conceitual adequada entre a versão adaptada e a original, bem como uma excelente aceitabilidade desse instrumento.

Abstract Patients’ knowledge about oral anticoagulant therapy may favor the achievement of therapeutic results and the prevention of adverse pharmacotherapy-related events. Brazil lacks validated instruments for assessing the patient’s knowledge about treatment with warfarin. This study aimed to perform the cross-cultural adaptation of the Oral Anticoagulation Knowledge (OAK) Test instrument from English into Portuguese. This is a methodological study developed in an anticoagulation clinic of a public university hospital. The study included initial translation, synthesis of translations, back-translation, review by the experts committee and pre-testing with 30 individuals. We obtained semantic equivalence through the analysis of the referential and general meaning of each item. The conceptual equivalence of the items sought to demonstrate the relevance and acceptability of the instrument. The process of cross-cultural adaptation produced the final version of the OAK Test in Brazilian Portuguese entitled “Teste de Conhecimento sobre Anticoagulação Oral”. There was a suitable semantic and conceptual equivalence between the adapted version and the original version, as well as an excellent acceptability of this instrument.

Beneficial effects of a pharmaceutical care program on outpatients with inflammatory bowel disease

This study aimed to evaluate the effects of aPharmaceutical Care (PC) program among outpatientswith Inflammatory bowel diseases (IBD) in an outpatientdepartment of a tertiary care teaching hospital in RibeiraoPreto, Brazil. Patients with IBD were randomizedinto two groups, one to receive PC procedures (PCG;N=18) and a control group (CG; N=17). Both groupswere followed for one year and compared at six (T6),and 12 (T12), months of study. Patients were assessedfor treatment compliance, knowledge about treatment,clinical colitis activity index, and quality of life (SF-36). In PCG patients, the number of adherent patientssignificantly increased from 28% to 72% (p<0.05), andin the percent score for patient knowledge increasedfrom 80% to 100% (p≤0.0001) from T0 to T12. Therewas a significant decrease in clinical activity indexesfrom T6 to T12 in PCG patients (median; range: 2.20;0.99­3.77 versus 1.90; 0.99­3.77; p=0.02), but not inthe CG group (1.69; 0.99­3.77 versus 1.69; 0.99­3.48).Quality of life questionnaire rvealed increased scoresfor mental health domain at T12 in both PCG (57.5versus 65.3; p=0.04) and CG (56.9 versus 67.0; p=0.01)groups. The PC program was associated with increasedcompliance, better mental health-related quality of life,and enhanced knowledge about treatment.(AU)

Factors influencing the preference for purchasing generic drugs in a Southern Brazilian city

ABSTRACT OBJECTIVE The objective of this study is to identify factors associated with the preference for purchasing generic drugs in a medium-sized municipality in Southern Brazil. METHODS We have analyzed data from a population-based cross-sectional study conducted in 2012 with a sample of 2,856 adults (≥ 20 years old). The preference for purchasing generic drugs was the main outcome. The explanatory variables were the demographic and socioeconomic variables. Statistical analyses included Poisson regressions. RESULTS The preference for purchasing generic drugs was 63.2% (95%CI 61.4-64.9). The variables correlated with this preference in the fully adjusted models were: male (prevalence ratio [PR] = 1.08; 95%CI 1.03-1.14), age of 20-39 years (PR = 1.10; 95%CI 1.02-1.20), low socioeconomic status (PR = 1.15; 95%CI 1.03-1.28), and good knowledge about generic drugs (PR= 4.66; 95%CI 2.89-7.52). Among those who preferred to purchase generic drugs, 55.1% have reported accepting to replace the prescribed drug (if not a generic) with the equivalent generic drug. Another correlate of the preference for purchasing generic drugs was because individuals consider their quality equivalent to reference medicines (PR = 2.15; 95%CI 1.93-2.41). CONCLUSIONS Knowledge about generic drugs was the main correlate of the preference for purchasing generic drugs. The greater the knowledge or positive perception about generic drugs, the greater is the preference to purchase them. Therefore, educational campaigns for healthcare professionals and consumers appear to be the best strategy for expanding the use of generic drugs in Brazil.

Avaliação da compreensão da farmacoterapia entre idosos atendidos na Atenção Primária à Saúde de Belo Horizonte, MG, Brasil / An evaluation of elderly people´s understanding of pharmacotherapy among those treated in the Primary Healthcare System in Belo Horizonte, Brazil

Resumo Os idosos apresentam maior número de doenças, levando a maior uso de medicamentos e a farmacoterapia mais complexa. O objetivo do estudo foi avaliar o nível de compreensão da farmacoterapia entre idosos e fatores associados. Realizou-se estudo transversal analítico em Unidades Básicas de Saúde. Foram investigadas as características sociodemográficas, clínicas, funcionais e relativas ao uso de medicamentos. O nível de compreensão foi obtido após a análise de concordância entre a resposta do entrevistado e a informação contida na prescrição para: nome do medicamento, dose, frequência, indicação, precauções e efeitos adversos. O nível global de compreensão foi classificado como insuficiente em caso de discordância ≥ 30%. Dos 227 idosos entrevistados, 51,1% apresentaram compreensão insuficiente em relação aos medicamentos. Realizou-se regressão logística multivariada para observar os fatores associados à compreensão da farmacoterapia, sendo menor escolaridade e dependência para uso dos medicamentos os que apresentaram associação com a compreensão insuficiente (p < 0,05). É necessário implementar estratégias para aumentar a qualidade das orientações fornecidas aos idosos e garantir seu cumprimento.

Abstract There are a greater number of elderly people with diseases which has led to a greater use in medication and complexity in pharmacotherapy. The aim of this study was to understand the level of understanding on pharmacotherapy amongst the elderly and associated factors. An analytical transversal study was carried out in the Primary Health Care Units. Sociodemographic, clinical, and functional characteristics relative to the use of medication were explored. The level of understanding was obtained after a concordance analysis had been done based on the responses from the interviewees and the information on the medical prescriptions such as: name of medication, dosage, frequency, indication, precautions and side effects. The global level of understanding was classified as insufficient in cases where the discordance was ≥ 30%. Of the 227 elderly people interviewed, 51.1% showed an insufficient understanding in relation to their medication. We carried out multivariate logistic regression to observe the factors associated with an understanding of pharmacotherapy. We noted that those with a low level of education and a dependency on the use of medication showed insufficient understanding. (p < 0,05). It is necessary to implement strategies to increase the quality of the guidance given to the elderly and to ensure compliance.

Percepção, conhecimento e uso de medicamentos genéricos no Sul do Brasil: o que mudou entre 2002 e 2012? / Perception, knowledge, and use of generic drugs in southern Brazil: what changed from 2002 to 2012? / Percepción, conocimiento y uso de medicamentos genéricos en el Sur de Brasil: ¿qué ha cambiado entre 2002 y 2012?

Resumo: Este estudo compara a percepção, conhecimento e uso de medicamentos genéricos em adultos de Pelotas, Rio Grande do Sul, Brasil, por meio de dois estudos transversais de base populacional realizados em 2002 e 2012. Os desfechos estudados foram: (a) prevalência de utilização de medicamentos genéricos; (b) proporção de uso de medicamentos genéricos entre os demais medicamentos; (c) percepção dos usuários sobre preço e qualidade dos medicamentos genéricos; (d) conhecimento dos usuários sobre medicamentos genéricos; e (e) estratégias de aquisição de medicamentos. A prevalência de uso de medicamentos genéricos aumentou de 3,6% (IC95%: 3,0-4,3) para 26,1% (IC95%: 24,5-27,7) no período de dez anos. A percepção sobre preço e qualidade dos medicamentos genéricos se manteve estável, a identificação das características que diferenciam os medicamentos genéricos dos demais medicamentos melhorou (p < 0,001) e o erro de classificação de medicamento diminuiu (p < 0,001). Houve um aumento significativo na estratégia de aquisição de medicamentos pela substituição do medicamento prescrito pelo medicamento genérico. Entre 2002 e 2012, aumentou o conhecimento e uso de medicamentos genéricos, enquanto a percepção quanto ao menor preço e qualidade equivalente mantiveram-se elevadas.

Abstract: This study compared the perception, knowledge, and use of generic drugs by adults in Pelotas, Rio Grande do Sul State, Brazil, using two cross-sectional population-based studies from 2002 and 2012. Study outcomes were: (a) prevalence of use of generics; (b) generics as a proportion of all medication; (c) users' perceptions of prices and quality; (d) users' knowledge of generics; and (e) strategies for acquisition of medicines. Prevalence of generics use increased from 3.6% (95%CI: 3.0-4.3) to 26.1% (95%CI: 24.5-27.7) in the 10-year period. Perceptions of prices and quality of generics remained stable, identification of characteristics that distinguish generics from other drugs improved (p < 0.001), and drug classification errors decreased (p < 0.001). There was a significant increase in acquiring medication by replacing prescribed drugs with generics. Between 2002 and 2012 there was an increase in knowledge and use of generics, while perception of lower prices and equivalent quality remained high.

Resumen: Este estudio compara la percepción, conocimiento y uso de medicamentos genéricos en adultos de Pelotas, Río Grande do Sul, Brasil, a través de dos estudios transversales de base poblacional, realizados en 2002 y 2012. Los resultados estudiados fueron: (a) prevalencia de utilización de medicamentos genéricos; (b) proporción de uso de medicamentos genéricos entre los demás medicamentos; (c) percepción de los usuarios sobre el precio y calidad de los medicamentos genéricos; (d) conocimiento de los usuarios sobre medicamentos genéricos y (e) estrategias de adquisición de medicamentos. La prevalencia de uso de medicamentos genéricos aumentó de 3,6% (IC95%: 3,0-4,3) a 26,1% (IC95%: 24,5-27,7) en un período de 10 años. La percepción sobre el precio y calidad de los medicamentos genéricos se mantuvo estable, la identificación de las características que diferencian los medicamentos genéricos de los demás medicamentos mejoró (p < 0,001) y el error de clasificación de medicamentos disminuyó (p < 0,001). Hubo un aumento significativo en la estrategia de adquisición de medicamentos, a través de la sustitución del medicamento prescrito por el medicamento genérico. Entre 2002 y 2012 aumentó el conocimiento y uso de medicamentos genéricos, mientras que la percepción en lo referente al menor precio y calidad equivalente, se mantuvieron elevadas.