Clinical Trials Directive


The Clinical Trials Directive is a European Union directive aimed at facilitating the internal market in medicinal products within the European Union, while at the same time maintaining an appropriate level of protection for public health. It seeks to simplify and harmonise the administrative provisions governing clinical trials in the European Community, by establishing a clear, transparent procedure.
The Member States of the European Union were required to adopt and publish before 1 May 2003 the laws, regulations and administrative provisions necessary to comply with this Directive. The Member States had to apply these provisions at the latest with effect from 1 May 2004.
This Directive was repealed by Regulation 536/2014, dated 16 April 2014, which took effect on January 31st, 2022. The regulation reflected a view that "the legal form of a Regulation" was more appropriate than a directive requiring member state transposition.

The Articles of the Directive

The Articles of the Directive:

The effects of the directive

It increased the costs of doing clinical trials in the EU, and a reduction in the number of such trials followed its implementation, especially of academic-led studies, and ones looking at new uses for old drugs. Germany derogated from the directive. It is due to be replaced by the EU Clinical Trials Regulation in 2016. The changes are due to come into effect in the second half of 2019.