is a registry of federally and privately supported clinical trials conducted in the United States and around the world. gives you information about a trial's purpose, who may participate, locations, and phone numbers for more details. This information should be used in conjunction with advice from health care professionals.   Read more...
  Search for Clinical Trials
Find trials for a specific medical condition or other criteria in the registry. currently has 66,999 trials with locations in 161 countries.
  Investigator Instructions
Get instructions for clinical trial investigators/sponsors about how to register trials in Learn about mandatory registration and results reporting requirements and US Public Law 110-85 (FDAAA).
  Background Information
Learn about clinical trials and how to use, or access other consumer health information from the US National Institutes of Health.