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The Modernized ClinicalTrials.gov Will Become the Singular Website Experience

Classic Website to Retire on June 25, 2024

May 30, 2024

Starting June 25, 2024, the National Library of Medicine’s (NLM) modernized ClinicalTrials.gov website will become the singular website experience for all users. As part of its commitment to enhance the user experience and deliver improved functionality for searching, viewing, and downloading information about clinical trials, NLM is retiring the classic version of the website and its application programming interface. Attempts to use the classic version of the ClinicalTrials.gov website (https://classic.clinicaltrials.gov/), including some frequently used links, will automatically be redirected to the modernized ClinicalTrials.gov website (www.clinicaltrials.gov) where information and documents continue to be available.

ClinicalTrials.gov is the world’s largest clinical trial and results registry. This web-based resource provides patients and their advocates, health care providers, researchers, and the public with easy access to information on publicly and privately supported clinical research studies covering a wide range of diseases and conditions. Managed by NLM on behalf of the National Institutes of Health (NIH), ClinicalTrials.gov lists records for more than 490,000 clinical trials, observational studies, and expanded access programs.

As previously announced, users have had nearly a year to explore the modernized ClinicalTrials.gov website and take advantage of its benefits, which include web components that improve navigation and make important information easier to find. Register to learn more about preparing for the final transition to the new ClinicalTrials.gov, with NLM’s free webinar on June 6, 2024, at 1 p.m. EDT.

For more information, see Modernization Transition Top Questions. To learn more about the modernization effort and stay informed about future updates, visit the ClinicalTrials.gov Modernization webpage and the latest Release Notes.