Clinical trials


We need clinical trials to find potential medicines and vaccines that work to improve people’s health. Clinical trials can offer hope for many people and may help researchers find better treatments for others in the future.

What is a clinical trial?

A clinical trial is a research study in human volunteers. Each trial tests a new way to prevent, detect, diagnose or treat diseases. Clinical trials help determine whether vaccines and medicines (or new uses for existing medicines) are safe and effective.

Clinical trials are also known as intervention studies, clinical studies or clinical research. For more information on our global approach to clinical trials, please click here.

Results of MSD-sponsored clinical trials

We are committed to the timely registration of clinical trials in patients and to disclosing the results, regardless of their outcome. We seek to provide balanced and accurate information about our studies, and have strict guidelines in place to guide publication.

We also disclose medically important safety data from other studies. Along with publishing our clinical trial results in peer-reviewed medical journals, we post study results of our marketed products on