Query URLs only retrieve limited numbers of study records.
To download a zip file containing the content for all study records available on ClinicalTrials.gov (that is, all registration information as well as any available results information), enter one of the following URLs into your browser:
Each zip file contains multiple directories subdividing the large number of files into more manageable quantities. A top level "Contents.txt" file contains information about the number of study records and the date the studies were published.
Note: These are very large files. It will likely take several minutes to download an entire zip file. Additionally, many receiving systems may subject the zip file to automatic security/virus scanning. This scanning may take several additional minutes to complete before the zip file is ready for use. Please be patient.