About ClinicalTrials.gov

ClinicalTrials.gov offers up-to-date information for locating federally and privately supported clinical trials for a wide range of diseases and conditions. A clinical trial (also clinical research) is a research study in human volunteers to answer specific health questions. Interventional trials determine whether experimental treatments or new ways of using known therapies are safe and effective under controlled environments. Observational trials address health issues in large groups of people or populations in natural settings.

ClinicalTrials.gov currently contains 66,919 trials sponsored by the National Institutes of Health, other federal agencies, and private industry. Studies listed in the database are conducted in all 50 States and in 161 countries ClinicalTrials.gov receives over 40 million page views per month 50,000 visitors daily.

The U.S. National Institutes of Health (NIH), through its National Library of Medicine (NLM), has developed this site in collaboration with the Food and Drug Administration (FDA), as a result of the FDA Modernization Act, which was passed into law in November 1997. See the FDA document - Guidance for Industry: Information Program on Clinical Trials for Serious or Life-Threatening Diseases and Conditions (March 2002).

You can learn more about this site from its Frequently Asked Questions and Factsheet.

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Information for Investigators

For information on submitting studies to ClinicalTrials.gov, please see the information at http://prsinfo.clinicaltrials.gov.

Information for Webmasters

There is information available on linking to ClinicalTrials.gov from your web page.

Please read our Terms and Conditions regarding use of ClinicalTrials.gov data.