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Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted. The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov. Updates regarding government operating status and resumption of normal operations can be found at opm.gov.
Print Article: KA-04924

How often are studies updated in ClinicalTrials.gov?

The National Library of Medicine updates studies in the ClinicalTrials.gov database when we get information from the organizations that are doing the trials. We add new studies and update ongoing studies as new information becomes available, such as a new site being added or a change in the study's recruitment status.

Although the National Library of Medicine maintains the database, the content is provided by the organizations that conduct the studies so the frequency of updates depends on them.