Contact Medical Information

We advise to use the search functionality before contacting the channels below.

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Call 800-438-1985*
*8AM-9PM ET Monday to Friday; excluding holidays

Connect with Pfizer Medical Information regarding your medical question.

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Chat online with Pfizer Medical Information regarding your inquiry on a Pfizer medicine.

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Submit a medical question on a Pfizer prescription product
The submission will be reviewed during our standard business hours.

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To report an adverse event related to Pfizer-BioNTech COVID-19 Vaccine (also known as COMIRNATY ®, COVID-19 mRNA, Vaccine BNT162b2 or BNT162) or Pfizer COVID-19 Treatment (also known as PAXLOVID™ (nirmatrelvir tablets; ritonavir tablets)), and you are not part of a clinical trial* for this product, click the link below to submit your information:

Pfizer Safety Reporting Site

*If you are involved in a clinical trial for either product, adverse events should be reported to your coordinating study site.

If you cannot use the above website or would like to report an adverse event related to a different Pfizer product, please call Pfizer Safety at (800) 438-1985.

FDA Medwatch

You may also contact the U.S. Food and Drug Administration (FDA) directly to report adverse events or product quality concerns either online at www.fda.gov/medwatch or by calling (800)-332-1088.