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Reporting Adverse Events

Important Note: Patients should always ask their doctors for medical advice about adverse events.

In the United States

You may report an adverse event related to Pfizer products by calling 1-800-438-1985 (U.S. only). If you prefer, you may contact the U.S. Food and Drug Administration (FDA) directly. The FDA has established a reporting service known as Medwatch where health care professionals and consumers can report serious problems they suspect may be associated with the drugs and medical devices they prescribe, dispense, or use. Visit Medwatch or call 1-800-FDA-1088

Outside the United States

Countries worldwide may have specific processes in place to handle reports of adverse events. To report an adverse event, ask your health care provider for more information or contact your local health authority.

To learn more about medicine safety, visit


Conducting Research & Clinical Trials

Read Pfizer's commitment to conducting ethical research, ensuring the safety and privacy of patients and how we approach clinical trials.