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Findings from recently published placebo-controlled trials in idiopathic pulmonary fibrosis have established that pirfenidone and nintedanib prevent about 50% of the decline in forced vital capacity typically seen in this disease; future trials are therefore unlikely to use placebo as a control group for ethical reasons. Future clinical assessment will probably include add-on trials in which a new drug is combined with an intervention with established efficacy; this development is in turn likely to herald the use of combination regimens in clinical practice. Personalised medicine (the selection of monotherapies on the basis of individualised biomarker signal) is an intrinsically attractive alternative approach, but is unlikely to be useful in routine management of idiopathic pulmonary fibrosis in the medium-term future because of the complex nature of the disease's pathogenesis. In this Personal View, we review the pleiotropic …