Clinical Trial Guides
Educational resources for patients, caregivers, and anyone interested in U.S. clinical research. According to ClinicalTrials.gov, the National Institutes of Health public registry maintained by the U.S. National Library of Medicine catalogs more than 500,000 clinical studies across over 220 countries since 1997, with the U.S. Food and Drug Administration Amendments Act (FDAAA) of 2007 requiring registration for most studies of FDA-regulated products. These guides cover the federal regulations, informed consent, sponsor types, and patient rights. See our methodology for data sources.
Clinical trials are research studies that test medical treatments, devices, or interventions in people. These guides explain how trials work, your rights as a participant, and how to find studies for your condition. All information is for educational purposes — consult your healthcare provider before joining any trial.
Explore the Data
Guides provide context. For the trial data itself, explore conditions, sponsors, and states.
Methodology
Our guides are based on publicly available data from authoritative government sources. All statistics, ratings, and figures cited in these guides are drawn directly from official datasets and publications, with sources clearly referenced throughout.
We aim to present complex government data in plain language that is accessible to general audiences. When methodologies differ between data sources or change over time, we note these variations inline. Our editorial process includes regular reviews to ensure accuracy and timeliness of the information presented.