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Drug companies are unwilling to share information on trial protocols, study finds

BMJ 2018; 360 doi: (Published 26 January 2018) Cite this as: BMJ 2018;360:k416
  1. Anne Gulland
  1. London

Drug companies are withholding information on trial protocols, a study has found, as half of commercially sponsored trial protocols contain redactions.

The authors of the study, published in the Journal of the Royal Society of Medicine,1 requested access to trial protocols approved by a research ethics committee in Denmark from October 2012 to March 2013. They requested access to 78 commercial and non-commercial protocols under freedom of information rules, but gaining access was difficult: despite the researchers’ assurances that …

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