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[How much does research and development of a drug cost? A call for more transparency].

The cost of research and development (R&D) for a new medicine is an essential element in the debate about fair prices. In a recent study, we estimated R&D costs at an average of around 1.1 billion euro per drug; that is a lot of money, but more than 50% lower than the usual estimate of 2.4 billion euro. There is a need for more transparency about R&D costs, so that proposed prices for medicines can be better assessed on their fairness.