
Participant resources
Learn about the important role participants play in clinical trials and information to help you decide if joining a clinical trial is right for you.
Clinical Trials
Merck & Co, Inc, Rahway, NJ, USA, known as MSD outside of the United States and Canada, provides international versions of this site for both healthcare professionals and the general public.
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Oncology Trials
We are committed to oncology (cancer) research to find out if study drugs alone, or in combination with other study drugs, may help improve lives of people with cancerCancerAbnormal cells that grow out of control [may invade other tissues and may spread into other parts of the body]; Also called malignancy..
We have clinical trials enrolling or planned for multiple cancerCancerAbnormal cells that grow out of control [may invade other tissues and may spread into other parts of the body]; Also called malignancy. types. Choose from the list below to learn more.
There is a lot to consider when deciding whether to participate in a clinical trialClinical Study / Clinical TrialA way to learn how the body responds to a medicine, vaccine, or medical device. [This is done to see if it is safe and works in people.]. Any clinical trial includes risksRiskChance (likelihood) for an event, reaction or health problem to happen, which the study doctor will review with you. Make sure you understand the risks before participating.

Learn about the important role participants play in clinical trials and information to help you decide if joining a clinical trial is right for you.

Learn what clinical trials are and how they work, and get answers to other common questions.