Unrestricted Access


This is a freely accessible website from the U.S. National Institutes of Health, through its National Library of Medicine (NLM), has developed to provide patients, family members and members of the public access to information about human, clinical research studies for diseases and conditions. Private and public funded studies are part of the database.


Within the Search box area, there are various links to help with searching the database. There are also links geared towards helping patients locate studies and some for assisting researchers with submitting information to the database.  Not familiar with some basics about reading a study in the Clinical Trials database? Use the “Search Help” option, “How to read a study record.”

User tools and features

Content is organized for particular user groups, e.g. patients and families, researchers.  It functions with a basic text word search feature on the PubMed platform.

Dates covered

Most current.

Updating frequency



Professional association web sites, published guidelines (journal articles, Web sites, other publications).

Type of coverage

Patient guidelines.

Print counterpart or
related resources

Patient care guidelines as published in the professional literature or on professional web sites.

Producer/content provider

Various professional associations, National Institutes of Health and other U.S. government associations

Vendor/electronic presentation provider

National Library of Medicine

Supplementary Subject(s)