Lessons Learned from the COVID-19 Pandemic: Interpreting Vaccination Strategies in a Nationwide Demographic Study.

OBJECTIVE: Brazil was strongly affected by the COVID-19 pandemic. Its continental dimension and socio-demographic characteristics pose challenges to distribution and accessibility, making vaccination programs challenging. The objectives of the study were to describe the clinical and demographic characteristics of the general population vaccinated against COVID-19 by October 2021 and analyze the strategies implemented during the vaccination program. STUDY DESIGN AND SETTING: A retrospective nationwide study that analyzed data from the OpenDataSUS platform of the Informatics Department of the Brazilian Ministry of Health (DataSUS), which contains information from all individuals in Brazil who have received at least one dose of any vaccine against COVID-19 approved by the National Health Agency (ANVISA) from 17 January to 3 October 2021. RESULTS: Until 3 October, a total of 146,254,578 persons (68.6 per 100 inhabitants) received at least one dose of a vaccine in Brazil. The north and northeast regions had the lowest vaccination rates compared with the remaining regions (North: 56.8, Northeast: 62.0, South: 74.4, and Southeast: 73.2 per 100 inhabitants). Elderly individuals had the highest vaccination rates, particularly those above 70 years old. Heterologous dosing regimens were administered to 1,063,079 individuals (0.7% of those receiving the first dose). CONCLUSIONS: The COVID-19 vaccination program reached more than two-thirds of the population in Brazil by 9 months after its start, but the vaccination coverage was heterogeneous, reflecting the country's geographic and socio-demographic characteristics. Establishing priority groups for vaccination was a main characteristic of the vaccination strategy. In addition, technology transfer agreements have played an important role in increasing vaccine accessibility.

Benzbromarone in the treatment of gout.

BACKGROUND: Benzbromarone is a uricosuric drug that has been used in the treatment of gout over the last 30 years. Due to its potent inhibition of the dominant apical (luminal) urate exchanger in the human proximal tubule URAT1, it reduces the urate reabsorption, diminishing serum urate levels and therefore preventing gout flares. Through several clinical trials, Benzbromarone has been proved effective and safe, inclusive in patients with chronic kidney disease and as combination therapy with allopurinol. Due to hepatotoxicity reports, it was withdrawn from the European market by the manufacturer, however many authors have questioned the product's withdrawal due to a lack of clinical evidence in order to support its hepatotoxicity. Benzbromarone is still available in several European countries, New Zealand, Brazil and several other countries. Despite the product's marketing over more than 20 years after the first hepatotoxicity reports, we have found only five reports in our literature search, and no prospective or retrospective study correlating hepatotoxicity with benzbromarone use. SHORT CONCLUSION: Benzbromarone is a safe and effective molecule for the treatment of gout. However, due to in vitro and in vivo data related to hepatotoxicity, it is prudent to prescribe it with some caution, especially for patients with an already known liver condition.

Benzbromarone in the treatment of gout

Abstract Background Benzbromarone is a uricosuric drug that has been used in the treatment of gout over the last 30 years. Due to its potent inhibition of the dominant apical (luminal) urate exchanger in the human proximal tubule URAT1, it reduces the urate reabsorption, diminishing serum urate levels and therefore preventing gout flares. Main body of the abstract Through several clinical trials, Benzbromarone has been proved effective and safe, inclusive in patients with chronic kidney disease and as combination therapy with allopurinol. Due to hepatotoxicity reports, it was withdrawn from the European market by the manufacturer, however many authors have questioned the product's withdrawal due to a lack of clinical evidence in order to support its hepatotoxicity. Benzbromarone is still available in several European countries, New Zealand, Brazil and several other countries. Despite the product's marketing over more than 20 years after the first hepatotoxicity reports, we have found only five reports in our literature search, and no prospective or retrospective study correlating hepatotoxicity with benzbromarone use. Short conclusion Benzbromarone is a safe and effective molecule for the treatment of gout. However, due to in vitro and in vivo data related to hepatotoxicity, it is prudent to prescribe it with some caution, especially for patients with an already known liver condition.

The biosimilars journey: current status and ongoing challenges.

Biosimilar products are already approved and marketed in several countries. The Food and Drug Administration has approved ten different biosimilars, and the European Medicines Agency has approved 40. Even though this scenario has provided important experience with biosimilar products, there are still challenges and unanswered questions. Up to now, a good amount of knowledge has been gathered in order to support the importance of the totality of evidence and the construction of a biosimilarity exercise for regulatory approval. In addition, the extrapolation of indications has been proved viable when a careful analysis is performed. The models for clinical trials and the use of the most sensible populations have been extensively discussed, and there is apparent homogeneity in manufacturer choices for study designs. However, some challenges remain. The lack of regulatory harmony, especially concerning naming, the marketed intended copies, the interchangeability, and the biosimilars in orphan diseases are some of those and are the focus of discussion in this review.

Partnership for productive development of biosimilar products: perspectives of access to biological products in the Brazilian market.

The manufacturing process for biological products is complex, expensive and critical to the final product, with an impact on their efficacy and safety. They have been increasingly used to treat several diseases, and account for approximately 50% of the yearly budget for the Brazilian public health system. As the patents of biological products expire, several biosimilars are developed. However, there are concerns regarding their efficacy and safety; therefore, the regulatory agencies establish rules to approve and monitor these products. In Brazil, partnership programs between national government-owned companies and private technology holders have been implemented, aiming at knowledge sharing, capacity-building and technological transfer. Such partnerships locally promote manufacturing of these strategic drugs at reduced costs to the public health system. These agreements offer mutual advantages to both the government and patent holders: for the former, a biotechnological development flow is established and enables potential cost reduction and self-sufficient production; whereas for the latter, exclusive sales of the product are ensured during technological transfer, for a fixed period.

Partnership for productive development of biosimilar products: perspectives of access to biological products in the Brazilian market / Parceria para o desenvolvimento produtivo com produtos biossimilares: perspectivas de acesso a produtos biológicos no mercado brasileiro

ABSTRACT The manufacturing process for biological products is complex, expensive and critical to the final product, with an impact on their efficacy and safety. They have been increasingly used to treat several diseases, and account for approximately 50% of the yearly budget for the Brazilian public health system. As the patents of biological products expire, several biosimilars are developed. However, there are concerns regarding their efficacy and safety; therefore, the regulatory agencies establish rules to approve and monitor these products. In Brazil, partnership programs between national government-owned companies and private technology holders have been implemented, aiming at knowledge sharing, capacity-building and technological transfer. Such partnerships locally promote manufacturing of these strategic drugs at reduced costs to the public health system. These agreements offer mutual advantages to both the government and patent holders: for the former, a biotechnological development flow is established and enables potential cost reduction and self-sufficient production; whereas for the latter, exclusive sales of the product are ensured during technological transfer, for a fixed period.

RESUMO O processo de manufatura de produtos biológicos é complexo, oneroso e crítico para o produto final, com impacto em sua eficácia e segurança. Seu uso está sendo cada vez mais ampliado no tratamento de diversas doenças, e cerca de 50% do orçamento anual do sistema de saúde público brasileiro é consumido por tais produtos. Com o término da proteção de patentes de produtos biológicos diversos, estão sendo desenvolvidos os biossimilares. Porém, há preocupações relacionadas com sua eficácia e segurança, fazendo com que os órgãos reguladores criem regulamentações para sua aprovação e monitoramento. No Brasil, estão sendo implantados programas de parceria entre laboratórios públicos nacionais e laboratórios detentores de tecnologia, objetivando a obtenção de conhecimento, capacitação profissional e transferência desta tecnologia. Tais parcerias visam à produção local destes medicamentos estratégicos a um custo reduzido para o Sistema Único de Saúde. Os acordos oferecem vantagens mútuas para o governo e o laboratório detentor da patente do produto biológico: ao primeiro, estabelece-se um fluxo de desenvolvimento biotecnológico, que possibilita potencial redução de custos e autossuficiência na produção, enquanto ao segundo garante-se a exclusividade da venda do produto durante a transferência da tecnologia por um prazo estabelecido.

The Experience with Biosimilars of Infliximab in Rheumatic Diseases.

BACKGROUND: Infliximab biosimilars are the first biosimilars of monoclonal antibodies approved by the main regulatory agencies. Up to the present day, two infliximab biosimilars have been approved: CT-P13 (Celltrion), and SB2 (Biogen), but other companies have been developing candidate infliximab biosimilars that are on clinical trials: PF 06438179 (Pfizer), the ABP710 (bioCentury/Amgen) the BCD055 (JSC Biocad Russica) and BOW015 (Epirus). METHODS: We have made a literature search in MedLine database using the key words [Infliximab] and [biosimilars] and [rheumatic diseases] and [rheumatisms]. We have also made a search in the clinicaltrials.org website. CONCLUSIONS: Clinical data published so far have provided important evidence on long-term efficacy and safety, immunogenicity and switching, supporting the use of CT-P13 and SB2 for the treatment of rheumatic diseases. In addition, the European experience has proved the economic advantages of the incorporation of infliximab biosimilars in clinical practice. Despite the widespread use of infliximab biosimilars there is still a lack of data regarding interchangeability between reference products and biosimilars.

Consenso brasileiro multi-institucional de pacientes sobre medicamentos biossimilares / Brazilian patients multi-institutional consensus on biosimilar drugs

Objetivo: O presente trabalho tem como objetivo emitir um consenso de diversas associações de pacientes sobre os produtos biossimilares. Métodos: O consenso foi produzido em reunião presencial com 15 representantes de 11 diferentes associações de pacientes. Previamente ao encontro, realizou- -se exercício Delphi contemplando 12 diferentes tópicos referentes a medicamentos biossimilares, sendo os temas de menor concordância selecionados para aulas informativas. Posteriormente, os participantes reuniram-se para discussão dos temas e elaboração do consenso. Resultados: O consenso concentrou-se em torno de oito temas gerais: nomenclatura, farmacovigilância, mercado nacional, RDC nº 55/2010, extrapolação de indicações, substituição automática, intercambialidade e estudos clínicos. Conclusões: Os medicamentos biossimilares representam avanço referente ao acesso à terapia biológica devido, especialmente, à competitividade econômica. Todavia, sua utilização deve ser respaldada por exercícios clínicos apropriados ­ exercício de biossimilaridade ­, respeitando a autonomia do prescritor e sempre apoiado em metodologias apropriadas de farmacovigilância.

Objective: This paper aims to publish a consensus from diverse patient associations on biossimilar drugs. Methods: The consensus was produced in a live meeting that gathered 15 representatives from 11 different patient associations. Previously to the meeting a Delphi exercise was elaborated contemplating 12 different subjects regarding biosimilar drugs. The subjects with smaller agreement were chosen to be discussed in informative lectures. Posteriorly, the attendants discussed the subjects and elaborated the consensus. Results: The consensus focused on eight different general subjects: nomenclature, pharmacovigilance, national Market, RDC nº 55/2010, extrapolation of controindications, automatic substitution, interchangeability, clinical trials. Conclusions: Biosimilar drugs represent progress regarding the access to biologic treatment, especially due to its economic competitiveness. However, its use must be supported by proper clinical trials ­ biosimilarity exercise ­ respecting the prescritor autonomy and counting on solid pharmacovigilance methods.