Clesrovimab Side Effects
Applies to clesrovimab: intramuscular solution.
Important warnings
This medicine can cause some serious health issues
Tell your doctor if you use other medicines or have other medical conditions or allergies.
Get emergency medical help if you have signs of an allergic reaction: hives, difficult breathing, swelling of the face, lips, tongue, or throat.
Call the doctor at once if your child has:
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muscle weakness;
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trouble swallowing;
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blue lips or fingernails; or
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bluish color of skin.
Common side effects may include:
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rash; or
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redness or swelling where the injection was given.
This is not a complete list of side effects and others may occur. Call your child's doctor for medical advice about side effects.
See also:
For healthcare professionals
Applies to clesrovimab: intramuscular solution.
Dermatologic adverse events
- Common (1% to 10%): Rash[Ref]
Rash includes rash, rash erythematous, rash macular, rash papular, rash maculo-papular, rash vesicular, rash exfoliative, dermatitis allergic, drug eruption and toxic skin eruption.[Ref]
Local
- Common (1% to 10%): Injection-site erythema, injection-site swelling (both within 5 days post-dose)[Ref]
References
1. (2025) "Product Information. Enflonsia Prefilled Syringe (cvx 332) (clesrovimab (cvx 332))." Merck Sharp & Dohme LLC
More about clesrovimab
- Check interactions
- Compare alternatives
- Dosage information
- During pregnancy
- Drug class: antiviral monoclonal antibodies
Patient resources
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Further information
Clesrovimab side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.
