Sorry, you need to enable JavaScript to visit this website.

Meet The People Who Make Clinical Trials Possible

Clinical trials can lead to life-changing new medicines, but they’re only possible with the help of every person involved.

  • The Sponsor

    The Sponsor, often a pharmaceutical company, designs and oversees the execution of the study. In some cases, the Sponsor also discovered the investigational medicine.

  • The Principal Investigator

    The Principal Investigator is the doctor who runs the study and is responsible for all study-related medical decisions.

  • The Study Coordinator

    The Study Coordinator assists the principal investigator and guides participants through the study experience.

  • Participants

    Participants are the people who join clinical studies and make research possible.


Pfizer sponsors over 200 clinical trials every year.  If you are considering joining a Pfizer study, you will meet with the Principal Investigator and his or her team at their offices in a location near you.  These healthcare professionals run the study and will take the time to explain all the details of the clinical trial and answer all your questions.

Finding a clinical trial that’s right for you, starts with a conversation with your doctor.  You can search for Pfizer sponsored clinical trials here or all clinical trials on


The Four Clinical Trial Phases

Learn more about the differences between each phase of a clinical trial.


Find a Pfizer Clinical Trial Near You

Use the search tool to find a Pfizer study in your area that’s right for you.


Have a Question About Clinical Trials?

Join the virtual chat to get a better understanding of how clinical trials work, and why.