U.S. Food and Drug Administration Approval of XELJANZ® (tofacitinib citrate) and Invitation to Media Briefing from Pfizer

Pfizer Inc.Media:Victoria DavisO: 484-865-5194E: orInvestor Contact:Jennifer DavisO: 212-733-0717E:

Pfizer Inc. (NYSE: PFE) has received approval from the U.S. Food and Drug Administration (FDA) for XELJANZ (tofacitinib citrate) 5 mg twice daily for the treatment of adults with moderately to severely active rheumatoid arthritis (RA) who have had an inadequate response or intolerance to methotrexate. XELJANZ may be used as monotherapy or in combination with methotrexate or other non-biologic disease-modifying antirheumatic drugs (DMARDs). XELJANZ should not be used in combination with biologic DMARDs or with potent immunosuppressives, such as azathioprine and cyclosporine.

XELJANZ (ZEL'jans') is the first approved RA treatment in a new class of medicines known as Janus kinase (JAK) inhibitors and the first new oral DMARD approved for RA in more than 10 years.

On November 6, at 6:00 P.M. ET, Pfizer will convene a panel, including Pfizer leadership and a prominent RA expert, to discuss the implications of having an additional treatment option for RA patients and rheumatologists. These panelists will be available for a Q&A session following opening remarks.

Please join the teleconference by dialing either (866) 246-2545 in the United States and Canada or (706) 634-2365 outside of the United States and Canada. The passcode is “Pfizer Approval.”

To view the press release, please visit .

For full prescribing information, including boxed warning and Medication Guide, please visit .

XELJANZ is a prescription medicine called a Janus kinase (JAK) inhibitor. XELJANZ is used to treat adults with moderately to severely active rheumatoid arthritis in whom methotrexate did not work well.

At Pfizer, we apply science and our global resources to improve health and well-being at every stage of life. We strive to set the standard for quality, safety and value in the discovery, development and manufacturing of medicines for people and animals. Our diversified global healthcare portfolio includes human and animal biologic and small molecule medicines and vaccines, as well as nutritional products and many of the world's best-known consumer products. Every day, Pfizer colleagues work across developed and emerging markets to advance wellness, prevention, treatments and cures that challenge the most feared diseases of our time. Consistent with our responsibility as the world's leading biopharmaceutical company, we also collaborate with healthcare providers, governments and local communities to support and expand access to reliable, affordable health care around the world. For more than 150 years, Pfizer has worked to make a difference for all who rely on us. To learn more about our commitments, please visit us at .

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