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What is XELJANZ/XELJANZ XR?

Patients should always ask their doctors for medical advice about side effects or adverse events. You are encouraged to report adverse events 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. Visit www.fda.gov/MedWatch or call 1-800-FDA-1088.

Safety Questions: 
What should I do if I experience side effects?
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