Chagas disease, a neglected illness, affects nearly 12-14 million people in endemic areas of Latin America. Although the occurrence of acute cases sharply has declined due to Southern Cone Initiative efforts to control vector transmission, there still remain serious challenges, including the maintenance of sustainable public policies for Chagas disease control and the urgent need for better drugs to treat chagasic patients. Since the introduction of benznidazole and nifurtimox approximately 40 years ago, many natural and synthetic compounds have been assayed against Trypanosoma cruzi, yet only a few compounds have advanced to clinical trials. This reflects, at least in part, the lack of consensus regarding appropriate in vitro and in vivo screening protocols as well as the lack of biomarkers for treating parasitaemia. The development of more effective drugs requires (i) the identification and validation of parasite targets, (ii) compounds to be screened against the targets or the whole parasite and (iii) a panel of minimum standardised procedures to advance leading compounds to clinical trials. This third aim was the topic of the workshop entitled Experimental Models in Drug Screening and Development for Chagas Disease, held in Rio de Janeiro, Brazil, on the 25th and 26th of November 2008 by the Fiocruz Program for Research and Technological Development on Chagas Disease and Drugs for Neglected Diseases Initiative. During the meeting, the minimum steps, requirements and decision gates for the determination of the efficacy of novel drugs for T. cruzi control were evaluated by interdisciplinary experts and an in vitro and in vivo flowchart was designed to serve as a general and standardised protocol for screening potential drugs for the treatment of Chagas disease

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The diversity of interventions and outcomes addressed across studies and differences in settings, populations and comparisons made it difficult to summarise results across studies. Cap and co-payment polices may reduce the use of medicines and reduce medicine expenditures for health insurers. However, they may also reduce the use of life-sustaining medicines or medicines that are important in treating chronic, including symptomatic, conditions and, consequently, could increase the use of healthcare services. Fixed co-payment with a ceiling and tiered fixed co-payment may be less likely to reduce the use of essential medicines or to increase the use of healthcare services.

This article examines pharmaceutical services and access to essential medicines in Brazil during the 30 years since the advent of Brazil's Unified Health System from a comprehensiveness perspective. The following topics are addressed: the "realignment" of pharmaceutical services; human resources in pharmaceutical services; the essential medicines concept; the rational use of medicines; technological advances and drug manufacturing; and ethical regulation. With a strong regulatory focus and a structural framework centered on the National Medicines Policy, the past three decades represent a mixture of progress and setbacks, considering the national complexities of the healthcare system and the political, economic and social changes that have influenced policy and access to medicines, which is a key concern even in the world's richest countries, as the forums of discussion on global health have demonstrated. We show that major steps forward have been taken, highlighting that the recent fiscal austerity measures imposed by the government threaten to seriously undermine social progress.

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O artigo discute a evolução do sistema internacional de direitos de propriedade intelectual em três fases e as implicações para saúde pública, especialmente para a implementação de políticas de acesso a medicamentos. Durante a primeira fase, caracterizada pelas Convenções de Paris e de Berna, os países signatários determinavam os campos tecnológicos que seriam protegidos ou não. Na segunda fase, com a implementação do Acordo TRIPS pela OMC, os países são obrigados a garantir proteção patentária a todos os campos tecnológicos, inclusive para a indústria farmacêutica. Dentro das suas respectivas legislações nacionais, os países também têm a oportunidade de implementar o acesso às flexibilidades do TRIPS para medicamentos. Com a terceira fase, caracterizada pela negociação e assinatura de acordos comerciais bilaterais e regionais, os países terão que implementar medidas TRIPS-plus que podem ter implicações negativas para as flexibilidades do TRIPS e para políticas de acesso a medicamentos. Os autores concluem que a proposta atual de sistema internacional de direitos de propriedade intelectual favorece os direitos dos detentores de patentes, que deveriam estar em equilíbrio com os direitos à saúde para a população.