Research participants are partners in discovery at the Clinical Center, the nation’s clinical research hospital. Clinical research is medical research involving people.The Clinical Center’s mission is to rapidly translate scientific observations and laboratory discoveries into new ways to diagnose, treat and prevent disease. More than 500,000 individuals from around the world have participated in clinical research at the Clinical Center since the hospital opened in 1953. The Clinical Center does not charge patients for participation and treatment in clinical studies at NIH. In addition, in certain emergency circumstances, you may qualify for help with travel and other expenses. For more information:Click here.

It is not the intention of NIH to provide specific medical advice, but rather to provide users with information to better understand their health and their diagnosed disorders. Specific medical advice will not be provided, and NIH urges you to consult with a qualified physician for diagnosis and for answers to your personal questions.

Email sent to the National Institutes of Health Clinical Center may be forwarded to appropriate NIH or outside experts for response. We do not collect your name and e-mail address for any purpose other than to respond to your query. Nevertheless, email is not necessarily secure against interception. This statement applies to NIH Clinical Center Studies website. For additional inquiries regarding studies at the National Institutes of Health, please call the Office of Patient Recruitment at 1-800-411-1222.

How to Search

A. How to Use Search

  • Use the search box found on the home page.
  • Enter one or more words in the search box and then select the “search” button.
  • A list of search results will display. The total number of studies found is shown at the top, along with your search terms.
  • The studies that most closely match your search terms are listed first.

B. Search Logic Rules

  • Single word searches
    • example: diabetes
    • result: finds clinical studies containing the word diabetes
  • Multiple word Searches
    • example: diabetes insulin
    • result: finds clinical studies containing either word (diabetes OR insulin) and both words (diabetes and insulin)

C. Displayed Results

  • The results of all the words entered for the search can be reviewed by scrolling down on the first Search Results page.
  • Additional links are provided to review the results of the search by each individual word and multiple combinations of the words within the user's search term(s). For example, clicking on the [+diabetes] link will display all clinical studies with the word diabetes and not the word insulin. The [+diabetes +insulin] link will display all the clinical studies with both words [+diabetes +insulin].