UPDATE 8/29/24: The ClinicalTrials.gov modernized PRS is currently experiencing technical problems and their team is investigating, so if you see an error in an old study record, please reach out to the UIowa PRS administrator @ ct-gov@uiowa.edu. 

A modernized API for Clinicaltrials.gov has replaced the classic API, which was retired on June 25, 2024. An API migration guide is available to help users understand the differences between the classic API and the modernized API. Additional support materials include documentation on the Study Data Structure and Search Areas pages of the modernized ClinicalTrials.gov. Study records with sections still under development with Results, Delayed Results, or Study Documents will continue to open in the Classic PRS view. For more information on the PRS transition, visit the Modernization Transition Top Questions.