The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, …

Sep 10, 2024 · A clinical trial is medical research that involves people who volunteer to take part in different medical studies. Clinical trials are significant because they’re the only way for …

In any clinical trial, the number of subjects, also called the sample size, has a large impact on the ability to reliably detect and measure the effects of the intervention.

Learn more about the basics of clinical trial participation, read first hand experiences from actual clinical trial volunteers, and see explanations from researchers at the NIH Clinical...

Oct 7, 2025 · The ICTRP is a global initiative that aims to make information about all clinical trials involving humans publicly available. It also aims to: improve the comprehensiveness, …

Apr 24, 2025 · The NIH maintains an online database of clinical research studies taking place at its Clinical Center, which is located on the NIH campus in Bethesda, Maryland. Studies are …

The idea for a clinical trial —also known as a clinical research study —often originates in the laboratory. After researchers test new therapies or procedures in the laboratory and in animal …

Cancer Clinical Trial Information for Patients and Caregivers Explore the basics of clinical trials, including what they are, how they work, and what to expect.

Mar 24, 2022 · Clinical trials are an important part of the research spectrum. The idea for a clinical trial often starts in the lab. After researchers test new treatments or procedures in the lab and …

Dec 17, 2024 · Participants have many different reasons for joining clinical trials. Some participate for the chance to access new therapies that may improve or prevent a health issue. And some …