Frequently asked questions

A member of the study team at the location where you’re participating is typically your main point of contact throughout the clinical trial. This member of the study team can answer many questions about the day-to-day details of the study. Depending on your question, he or she may refer you to other members of the study team, such as the principal investigator.

You should contact the study doctor as soon as the side effect happens, and follow any instructions that he or she provides. The study doctor may determine that you need additional procedures or medicines to help manage the side effects. Additional details of what you should do if you experience a side effect may be explained in the informed consent document for your study.

All side effects should be reported to the study doctor, even if you believe the side effect is mild or that it wasn’t caused by the study medicine. Contact information for the study doctor, including a 24-hour emergency contact number, can be found on study materials you received. These materials include the informed consent document and a medical emergency contact card.

Seek medical assistance immediately. All participants in Pfizer clinical trials are provided with a medical emergency contact card. You should provide this card to the healthcare professionals caring for you in the emergency. The healthcare professionals can call the phone number on the card to learn about the clinical trial and the study medicine that you are receiving. Additional details of what you should do in case of an emergency may be explained in the informed consent document of your study.

You are always free to leave a clinical trial at any time and for any reason. If you decide to leave the study, please tell the study doctor so that you can end your participation in the safest way. The study doctor will explain how to return the study medicine and what other steps may occur.

Your decision to stop participating in the study will not affect your regular medical care or any benefits to which you are entitled. The informed consent document of your study may provide more details on what happens if your participation in the study ends.