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Terms and Conditions



The following Terms and Conditions apply for use of ClinicalTrials.gov data. Downloading ClinicalTrials.gov data indicates your acceptance of the following Terms and Conditions. These Terms and Conditions apply to all data obtained from ClinicalTrials.gov, independent of format and method of acquisition.

Purpose of ClinicalTrials.gov Database

The U.S. National Institutes of Health, Department of Health and Human Services, through its National Library of Medicine, has developed ClinicalTrials.gov to provide patients, family members, and members of the public current information about clinical research studies. ClinicalTrials.gov contains summary information about clinical studies being conducted throughout the United States and in many countries throughout the world. These data are provided to the National Library of Medicine by organizations and institutions that sponsor and implement the studies.

ClinicalTrials.gov is updated daily. You should check ClinicalTrials.gov frequently for updated information.

Availability of Data

ClinicalTrials.gov data are available to all requesters, both within and outside the United States, at no charge.

Use of ClinicalTrials.gov Data

Neither the United States Government, U.S. Department of Health and Human Services, National Institutes of Health, National Library of Medicine, nor any of its agencies, contractors, subcontractors or employees of the United States Government make any warranties, expressed or implied, with respect to data contained in the database, and, furthermore, assume no liability for any party's use, or the results of such use, of any part of the database.

In any publication or distribution of these data, you should:

  • Attribute the source of the data as ClinicalTrials.gov
  • Update the data such that they are current at all times
  • Clearly display the date the data were processed by ClinicalTrials.gov
  • State any modifications made to the content of the data, along with a complete description of the modifications

You shall not assert any proprietary rights to any portion of the database, or represent the database or any part thereof to anyone as other than a United States Government database.

You shall not use any email addresses extracted from our database for marketing or other promotional purposes.

The ClinicalTrials.gov data carry an international copyright outside the United States and its Territories or Possessions. Some ClinicalTrials.gov data may be subject to the copyright of third parties; you should consult these entities for any additional terms of use.

These terms and conditions are in effect as long as the user retains any of the data obtained from ClinicalTrials.gov.
This page last reviewed in May 2014