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Welcome Data Providers
  • The Clinical Trials Search Portal provides access to a central database containing the trial registration data sets provided by the registries listed on the right. It also provides links to the full original records.
  • To facilitate the unique identification of trials, the Search Portal bridges (groups together) multiple records about the same trial. More information

  • Please note: This Search Portal is not a clinical trials registry. How to register a trial

  • It is possible to export the results of the search into XML. More information

  • Crawling the ICTRP database now requires a username/password. To request access to the crawling pages please send an email to ictrpinfo@who.int

  • A new field called 'Prospective registration' has been added to the ICTRP database, More details about this new field can be found here

  • The WHO Database of Regulatory Information Tracking of Clinical Trials Registration & Ethics Committees (REGTRAC) is now online here
  • Australian New Zealand Clinical Trials Registry, last data file imported on 28 February 2022
  • Chinese Clinical Trial Registry, last data file imported on 28 February 2022
  • ClinicalTrials.gov, last data file imported on 28 February 2022
  • EU Clinical Trials Register (EU-CTR), last data file imported on 1 March 2022
  • ISRCTN, last data file imported on 1 March 2022
  • The Netherlands National Trial Register, last data file imported on 1 March 2022
  • Brazilian Clinical Trials Registry (ReBec), last data file imported on 7 February 2022
  • Clinical Trials Registry - India, last data file imported on 21 February 2022
  • Clinical Research Information Service - Republic of Korea, last data file imported on 8 February 2022
  • Cuban Public Registry of Clinical Trials, last data file imported on 7 February 2022
  • German Clinical Trials Register, last data file imported on 7 February 2022
  • Iranian Registry of Clinical Trials, last data file imported on 7 February 2022
  • Japan Registry of Clinical Trials (jRCT), last data file imported on 1 March 2022
  • Pan African Clinical Trial Registry, last data file imported on 7 February 2022
  • Sri Lanka Clinical Trials Registry, last data file imported on 7 February 2022
  • Thai Clinical Trials Registry (TCTR), last data file imported on 7 February 2022
  • Peruvian Clinical Trials Registry (REPEC), last data file imported on 13 December 2021
  • Lebanese Clinical Trials Registry (LBCTR), last data file imported on 7 February 2022
Disclaimer: Trials posted on this search portal are not endorsed by WHO, but are provided as a service to our users. In no event shall the World Health Organization be liable for any damages arising from the use of the information linked to in this section. None of the information obtained through use of the search portal should in any way be used in clinical care without consulting a physician or licensed health professional. WHO is not responsible for the accuracy, completeness and/or use made of the content displayed for any trial record.
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