(marstacimab-hncq)

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What are the possible side effects of HYMPAVZI?

What are the possible side effects of HYMPAVZI?

HYMPAVZI may cause serious side effects, including:

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blood clots (thromboembolic events). HYMPAVZI may increase the risk for your blood to clot in blood vessels in your arm, leg, lung, or head and can be life-threatening. Get medical help right away if you develop any of these signs or symptoms of blood clots:
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swelling or pain in arms or legs
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redness or discoloration in your arms or legs
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shortness of breath
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pain in chest or upper back
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fast heart rate
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cough up blood
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feel faint
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headache
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numbness in your face
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eye pain or swelling
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trouble seeing
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allergic reactions. Allergic reactions, including rash and itching have happened in people treated with HYMPAVZI. Stop using HYMPAVZI and get medical help right away if you develop any of the following symptoms of a severe allergic reaction:
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swelling of your face, lips, mouth, or tongue
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trouble breathing
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wheezing
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dizziness or fainting
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fast heartbeat or pounding in your chest
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sweating

The most common side effects of HYMPAVZI are injection site reactions, including:

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itching
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swelling
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hardening
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redness
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bruising
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pain

These are not all of the possible side effects of HYMPAVZI.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Additional Resources

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If you cannot use the above website to report an adverse event related to a Pfizer medication, please call (800) 438-1985.

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.