Conestat Alfa Side Effects

Medically reviewed by Drugs.com. Last updated on May 4, 2024.

Applies to conestat alfa: intravenous powder for injection.

Get emergency medical help if you have signs of an allergic reaction: rash or hives; chest tightness, wheezing, difficult breathing; blue-colored lips or gums; fast heartbeats; feeling like you might pass out; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have:

• sudden numbness or weakness (especially on one side of the body);

• sudden severe headache, slurred speech, problems with vision or balance; or

• pain, swelling, warmth, or redness in one or both legs.

Common side effects may include:

• headache;

• diarrhea; or

• nausea.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.

For healthcare professionals

Applies to conestat alfa: intravenous powder for injection.

General adverse events

The most common adverse reactions were headache, nausea, and diarrhea.^[Ref]

Nervous system

• Very common (10% or more): Headache (up to 10%)
• Common (1% to 10%): Vertigo, procedural headache
• Uncommon (0.1% to 1%): Paresthesia^[Ref]

Dermatologic

• Common (1% to 10%): Angioedema, erythema marginatum, skin burning sensation
• Uncommon (0.1% to 1%): Urticaria
• Postmarketing reports: Rash^[Ref]

Gastrointestinal

• Common (1% to 10%): Nausea, diarrhea
• Uncommon (0.1% to 1%): Abdominal discomfort, oral paresthesia
• Postmarketing reports: Abdominal pain^[Ref]

Respiratory

• Common (1% to 10%): Sneezing
• Uncommon (0.1% to 1%): Throat irritation^[Ref]

Hematologic

• Common (1% to 10%): Fibrin D-dimer increased^[Ref]

Immunologic

• Common (1% to 10%): C-reactive protein increased^[Ref]

Musculoskeletal

• Common (1% to 10%): Back pain^[Ref]

Ocular

• Common (1% to 10%): Lipoma

Other

• Uncommon (0.1% to 1%): Swelling^[Ref]

See also:

Further information

Conestat alfa 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.

Medical Disclaimer