Other Sites About Clinical Studies - ClinicalTrials.gov
ClinicalTrials.gov Menu

Other Sites About Clinical Studies

The following Office for Human Research Protections (OHRP), National Institutes of Health (NIH), and Food and Drug Administration (FDA) Web sites provide information about clinical studies, drug development, and other health care issues.


General Information

About Research Participation

OHRP helps to protect the rights, welfare, and wellbeing of research volunteers. Visit OHRP's About Research Participation public outreach Web page to watch a series of short videos about research participation and print a list of questions to ask researchers.

NIH Clinical Research Trials and You

The NIH Clinical Research Trials and You Web site (page also available in Spanish) provides general information about participating in clinical research, with a focus on NIH-funded research.

MedlinePlus® Clinical Trials Information

MedlinePlus is a Web-based health information service of the National Library of Medicine. It explains health topics using language that is easy to understand. Visit the Clinical Trials page (also available in Spanish) to learn more about clinical research and find answers to common questions.

Children and Clinical Studies

The National Heart, Lung, and Blood Institute provides information about studies involving children on its Children and Clinical Studies page.

Clinical Trials and Drug Development

FDA is responsible for ensuring the safety and effectiveness of drugs, vaccines, and other medical products. Read more about clinical trials and the drug development process on FDA's Web site.

Selected Conditions Studied at NIH


The National Institute on Alcohol Abuse and Alcoholism conducts various research studies at the NIH campus in Bethesda, MD.

Alzheimer's Disease

The Alzheimer's disease clinical trials database is a joint project of FDA and the National Institute on Aging (NIA). It is maintained by NIA's Alzheimer's Disease Education and Referral Center. See the NIA publication Participating in Alzheimer's Research: For Yourself and Future Generations for more information.


The National Cancer Institute (NCI) is the U.S. Government's principal agency for cancer research and training. Most other U.S. Government agencies that conduct cancer research, such as the U.S. Department of Defense and the U.S. Department of Veterans Affairs, do so in partnership with NCI.

Visit NCI's Clinical Trials page to find information on cancer studies, read about noteworthy clinical studies, find resources for researchers, and browse the results of clinical studies by type of cancer.

The NCI Publications Locator provides access to publications that help individuals and health care professionals understand clinical studies. These include self-paced workbooks, booklets, DVDs, slide programs on CD-ROM, and online training courses.

Genetic and Rare Diseases

The Genetic and Rare Diseases (GARD) Information Center Web site provides information about research on rare diseases, including research supported by NIH.


AIDSinfo is a service of the U.S. Department of Health and Human Services that provides the latest federally approved information on HIV/AIDS clinical research; information on treatment and prevention; and medical practice guidelines for people living with HIV/AIDS, their families and friends, health care providers, scientists, and researchers. AIDSinfo also enables users to search ClinicalTrials.gov for HIV/AIDS clinical trials.

Mental Health

The National Institute of Mental Health's (NIMH) Clinical Trials - Participants page helps users find research studies on mental health and disorders. NIMH's Frequently Asked Questions About Participating in NIMH-IRP Research Studies for Adults and Children page answers common questions from research study participants and potential participants.


The National Eye Institute (NEI) provides information about clinical trials in vision research and NEI education programs.

Other NIH Research Areas

NIH Clinical Center

The NIH Clinical Center in Bethesda, MD, is the research hospital of NIH. The NIH Clinical Center Web site provides information for potential participants, their families, and doctors about participating in clinical studies at the center.

National Center for Complementary and Integrative Health (NCCIH)

NCCIH studies focus on interventions such as dietary supplements for a variety of conditions. See the NCCIH Clinical Trials page for more information.

National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)

Medical conditions studied by NIAMS include arthritis, lupus, and osteoporosis. See the NIAMS page on current studies at the NIH campus in Bethesda, MD.

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

NIDDK studies kidney, urine, blood, digestive, metabolic, and endocrine diseases as well as diabetes and nutrition. See the NIDDK Clinical Trials page for more information.

National Institute of Environmental Health Sciences (NIEHS)

NIEHS supports and conducts studies to determine how exposure to chemicals and other agents in the environment may influence a variety of diseases. See the NIEHS page on clinical research for more information.

Learn More

  • Learn About Studies: Learn more about how and why clinical research is conducted.
  • How to Search: Learn how to find studies on ClinicalTrials.gov.
  • RSS Feeds: Learn how to find recently added studies on ClinicalTrials.gov.
This page last reviewed in January 2017