For US residents only.

Frequently Asked Questions

Learn more about clinical trials

Clinical trials are health-related research studies that involve human subjects. Often, they test new drugs or new combinations of drugs. In the US, clinical trials follow specific protocol (rules) designed to make the studies safe, useful, and accurate.



Phases refer to the type of clinical trial being done on a particular drug. Each phase tries to answer different kinds of questions and work with different sized groups of people.



Reasons to participate are personal, but many people join clinical trials to get early access to new drugs and to help others who struggle with their disease.


Every clinical trial is different and has its own guidelines for participation. These guidelines are called eligibility criteria.


Participating in a clinical trial can give you access to much-needed drugs, but it could also expose you to unpleasant side effects and other discomfort. Discuss with your doctor and carefully consider the potential outcomes of participation in a clinical trial.


In most cases, participants in clinical trials are not paid, but the treatment is provided for free.

Yes, participants are free to leave clinical trials at any time, for any reason.

After the trial ends, researchers compile all the information, form conclusions, and publish the results. Often, further research is required before the Food and Drug Administration (FDA) approves it for general use.



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