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Palivizumab Side Effects

Medically reviewed by Last updated on Apr 2, 2023.

Applies to palivizumab: intramuscular solution.

Serious side effects of Palivizumab

Along with its needed effects, palivizumab may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor or nurse immediately if any of the following side effects occur while taking palivizumab:

More common

  • Bluish color of the fingernails, lips, skin, palms, or nail beds
  • blurred vision
  • confusion
  • cough
  • difficulty with breathing
  • difficulty with swallowing
  • dizziness
  • dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  • fast heartbeat
  • fever
  • hives or welts
  • irregular, fast or slow, or shallow breathing
  • itching
  • large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
  • loss of strength or energy
  • muscle pain or weakness
  • redness of the skin
  • shortness of breath
  • skin rash
  • sweating
  • tightness in the chest
  • unresponsiveness
  • unusual tiredness or weakness
  • wheezing

Incidence not known

  • Black, tarry stools
  • bleeding gums
  • blood in the urine or stools
  • pinpoint red spots on the skin
  • unusual bleeding or bruising

Other side effects of Palivizumab

Some side effects of palivizumab may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Incidence not known

  • Bleeding, blistering, burning, coldness, discoloration of the skin, feeling of pressure, hives, infection, inflammation, itching, lumps, numbness, pain, rash, redness, scarring, soreness, stinging, swelling, tenderness, tingling, ulceration, or warmth at the injection site

For Healthcare Professionals

Applies to palivizumab: intramuscular powder for injection, intramuscular solution.


Frequency not reported: Arrhythmia (during studies of congenital heart disease patients)[Ref]


Common (1% to 10%): Nausea, vomiting, diarrhea[Ref]


Frequency not reported: Anaphylaxis, anaphylactic shock (sometimes fatal)

Postmarketing reports: Angioedema[Ref]


Common (1% to 10%): Injection site reactions[Ref]


Very common (10% or more): Pyrexia[Ref]


Very common (10% or more): Rash

Uncommon (0.1% to 1%): Urticaria

Frequency not reported: Pruritus[Ref]


The most serious adverse reactions are anaphylaxis and other acute hypersensitivity reactions.[Ref]


Uncommon (0.1% to 1%): Thrombocytopenia (mild), eosinophilia (mild)

Postmarketing reports: Severe thrombocytopenia (platelet count less than 50,000/microliter)[Ref]

Nervous system

Uncommon (0.1% to 1%): Convulsions[Ref]


Frequency not reported: Cyanosis during studies of congenital heart disease patients

Postmarketing reports: Dyspnea, asthma, bronchospasm[Ref]


1. Product Information. Synagis (palivizumab). Ross Product Division Pharmaceuticals. 2001.

2. Boeckh M, Berrey MM, Bowden RA, Crawford SW, Balsley J, Corey L. Phase 1 evaluation of the respiratory syncytial virus-specific monoclonal antibody palivizumab in recipients of hematopoietic stem cell transplants. J Infect Dis. 2001;184:350-4.

3. Cerner Multum, Inc. UK Summary of Product Characteristics.

4. Pharmaceutical Society of Australia. APPGuide online. Australian prescription products guide online. 2006.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.