In recent years, the costs of new drug development have skyrocketed. The average cost of developing a new approved drug is now estimated to be $1.3 billion (DiMasi and Grabowski, 2007). At the same time, each year fewer new molecular entities (NMEs) are approved. DiMasi and Grabowski report that only 21.5 percent of the candidate drugs that enter phase I clinical testing actually make it to market. In 2007, just 17 novel drugs and 2 novel biologics were approved. In addition to the slowing rate of drug development and approval, recent years have seen a number of drugs withdrawn from the market for safety reasons. According to the Government Accountability Office (GAO), 10 drugs were withdrawn because of safety concerns between 2000 and March 2006 (GAO, 2006). Finding ways to select successful drug candidates earlier in development could save millions or even billions of dollars, reduce the costs of drugs on the market, and increase the number of new drugs with improved safety profiles that are available to patients. Emerging scientific knowledge and technologies hold the potential to enhance correct decision making for the advancement of candidate drugs. Identification of safety problems is a key reason that new drug development is stalled. Traditional methods for assessing a drug's safety prior to approval are limited in their ability to detect rare safety problems. Prior to receiving U.S. Food and Drug Administration (FDA) approval, a drug will have been tested in hundreds to thousands of patients. Generally, drugs cannot confidently be linked to safety problems until they have been tested in tens of thousands to hundreds of thousands of people. With current methods, it is unlikely that rare safety problems will be identified prior to approval. Emerging Safety Science: Workshop Summary summarizes the events and presentations of the workshop.
Biomarkers can be defined as indicators of any biologic state, and they are central to the future of medicine. As the cost of developing drugs has risen in recent years, reducing the number of new drugs approved for use, biomarker development may be a way to cut costs, enhance safety, and provide a more focused and rational pathway to drug development. On October 24, 2008, the IOM's Forum on Drug Discovery, Development, and Translation held "Assessing and Accelerating Development of Biomarkers for Drug Safety," a one-day workshop, summarized in this volume, on the value of biomarkers in helping to determine drug safety during development.
The process for developing new drug and biologic products is extraordinarily expensive and time-consuming. Although large pharmaceutical companies may be able to afford the cost of development because they can expect a large return on investment, organizations developing drugs to treat rare and neglected diseases are unable to rely on such returns. On June 23, 2008, the Institute of Medicine's Forum on Drug Discovery, Development, and Translation held a public workshop, "Breakthrough Business Models: Drug Development for Rare and Neglected Diseases and Individualized Therapies," which sought to explore new and innovative strategies for developing drugs for rare and neglected diseases.
Tuberculosis is one of the leading causes of death in the world today, with 4,500 people dying from the disease every day. Many cases of TB can be cured by available antibiotics, but some TB is resistant to multiple drugs-a major and growing threat worldwide. The Institute of Medicine's Forum on Drug Discovery, Development, and Translation hosted a workshop on November 5, 2008, to address the mounting concern of drug-resistant TB. The session brought together a wide range of international experts to discuss what is known and not known about this growing threat, and to explore possible solutions.
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